/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:51:31,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:51:31,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:51:31,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 06:51:32,021 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 [2021-06-05 06:51:32,045 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:51:32,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:51:32,046 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:51:32,046 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:51:32,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:51:32,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:51:32,048 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:51:32,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:51:32,048 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:51:32,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:51:32,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:51:32,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:51:32,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:51:32,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:51:32,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:51:32,049 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:51:32,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:51:32,050 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:51:32,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:51:32,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:51:32,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:51:32,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:51:32,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:51:32,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:51:32,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:51:32,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:51:32,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:51:32,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:51:32,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:51:32,051 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:51:32,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:51:32,051 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:51:32,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:51:32,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:51:32,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:51:32,288 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:51:32,289 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:51:32,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts.wvr.bpl [2021-06-05 06:51:32,290 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts.wvr.bpl' [2021-06-05 06:51:32,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:51:32,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:51:32,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:51:32,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:51:32,320 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:51:32,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:51:32" (1/1) ... [2021-06-05 06:51:32,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:51:32" (1/1) ... [2021-06-05 06:51:32,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:51:32,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:51:32,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:51:32,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:51:32,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:51:32" (1/1) ... [2021-06-05 06:51:32,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:51:32" (1/1) ... [2021-06-05 06:51:32,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:51:32" (1/1) ... [2021-06-05 06:51:32,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:51:32" (1/1) ... [2021-06-05 06:51:32,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:51:32" (1/1) ... [2021-06-05 06:51:32,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:51:32" (1/1) ... [2021-06-05 06:51:32,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:51:32" (1/1) ... [2021-06-05 06:51:32,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:51:32,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:51:32,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:51:32,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:51:32,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:51:32" (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 [2021-06-05 06:51:32,417 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:51:32,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:51:32,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:51:32,425 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:51:32,425 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:51:32,425 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:51:32,425 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:51:32,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:51:32,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:51:32,425 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 06:51:32,425 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 06:51:32,425 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 06:51:32,426 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:51:32,618 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:51:32,618 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:51:32,620 INFO L202 PluginConnector]: Adding new model mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:51:32 BoogieIcfgContainer [2021-06-05 06:51:32,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:51:32,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:51:32,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:51:32,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:51:32,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:51:32" (1/2) ... [2021-06-05 06:51:32,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6004b131 and model type mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:51:32, skipping insertion in model container [2021-06-05 06:51:32,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:51:32" (2/2) ... [2021-06-05 06:51:32,624 INFO L111 eAbstractionObserver]: Analyzing ICFG mts.wvr.bpl [2021-06-05 06:51:32,628 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:51:32,628 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:51:32,628 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:51:32,629 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:51:32,652 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 06:51:32,671 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 06:51:32,684 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:51:32,684 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:51:32,684 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:51:32,684 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:51:32,684 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:51:32,684 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:51:32,684 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:51:32,684 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:51:32,690 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 06:51:32,704 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:51:32,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:32,712 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:32,712 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:32,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1113490327, now seen corresponding path program 1 times [2021-06-05 06:51:32,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:32,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123061897] [2021-06-05 06:51:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:32,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:32,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123061897] [2021-06-05 06:51:32,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123061897] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:51:32,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:51:32,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:51:32,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590610069] [2021-06-05 06:51:32,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:51:32,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:32,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:51:32,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:51:32,890 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.6) 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) [2021-06-05 06:51:32,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:32,958 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-06-05 06:51:32,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:51:32,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) 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 [2021-06-05 06:51:32,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:32,969 INFO L225 Difference]: With dead ends: 154 [2021-06-05 06:51:32,969 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 06:51:32,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:51:32,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 06:51:33,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-06-05 06:51:33,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 06:51:33,016 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-06-05 06:51:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:33,017 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 06:51:33,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) 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) [2021-06-05 06:51:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 06:51:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:51:33,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:33,018 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:33,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:51:33,019 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:33,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:33,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2043191081, now seen corresponding path program 1 times [2021-06-05 06:51:33,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:33,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602448269] [2021-06-05 06:51:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:33,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:33,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602448269] [2021-06-05 06:51:33,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602448269] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:51:33,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:51:33,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:51:33,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667127099] [2021-06-05 06:51:33,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:51:33,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:33,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:51:33,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:51:33,077 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:33,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:33,107 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-06-05 06:51:33,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:51:33,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:51:33,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:33,110 INFO L225 Difference]: With dead ends: 158 [2021-06-05 06:51:33,110 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 06:51:33,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:51:33,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 06:51:33,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-06-05 06:51:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 06:51:33,128 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 06:51:33,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:33,128 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 06:51:33,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:33,128 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 06:51:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:51:33,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:33,130 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:33,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 06:51:33,130 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:33,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:33,131 INFO L82 PathProgramCache]: Analyzing trace with hash -219246905, now seen corresponding path program 1 times [2021-06-05 06:51:33,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:33,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570040977] [2021-06-05 06:51:33,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:33,514 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-06-05 06:51:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:33,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:33,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570040977] [2021-06-05 06:51:33,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570040977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:33,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910939383] [2021-06-05 06:51:33,626 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 [2021-06-05 06:51:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:33,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:51:33,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:34,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,067 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 20 treesize of output 14 [2021-06-05 06:51:34,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,075 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 25 treesize of output 17 [2021-06-05 06:51:34,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,083 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 27 treesize of output 19 [2021-06-05 06:51:34,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:51:34,096 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 32 treesize of output 22 [2021-06-05 06:51:34,097 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:34,141 INFO L628 ElimStorePlain]: treesize reduction 54, result has 43.2 percent of original size [2021-06-05 06:51:34,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:51:34,143 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:35 [2021-06-05 06:51:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:34,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910939383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:34,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:34,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:51:34,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612010533] [2021-06-05 06:51:34,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:34,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:34,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:34,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:34,187 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:34,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:34,488 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 06:51:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:51:34,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:51:34,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:34,490 INFO L225 Difference]: With dead ends: 330 [2021-06-05 06:51:34,490 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 06:51:34,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 529.9ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:51:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 06:51:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 06:51:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 06:51:34,506 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 06:51:34,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:34,507 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 06:51:34,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:34,507 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 06:51:34,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:51:34,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:34,508 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:34,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 06:51:34,720 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:34,721 INFO L82 PathProgramCache]: Analyzing trace with hash -387055997, now seen corresponding path program 2 times [2021-06-05 06:51:34,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:34,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991534084] [2021-06-05 06:51:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:34,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:34,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991534084] [2021-06-05 06:51:34,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991534084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:34,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113091790] [2021-06-05 06:51:34,948 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 [2021-06-05 06:51:34,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:34,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:34,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:51:34,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:35,174 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:51:35,174 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:51:35,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:35,185 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:51:35,185 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2021-06-05 06:51:35,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:35,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:51:35,196 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:51:35,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:35,206 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:51:35,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 06:51:35,207 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:35,239 INFO L628 ElimStorePlain]: treesize reduction 49, result has 38.0 percent of original size [2021-06-05 06:51:35,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:51:35,252 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:31 [2021-06-05 06:51:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:35,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113091790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:35,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:35,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 06:51:35,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724906070] [2021-06-05 06:51:35,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:51:35,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:35,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:51:35,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:51:35,316 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:35,747 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 06:51:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:51:35,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:51:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:35,750 INFO L225 Difference]: With dead ends: 374 [2021-06-05 06:51:35,750 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 06:51:35,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 516.1ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:51:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 06:51:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 06:51:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 06:51:35,759 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 06:51:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:35,759 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 06:51:35,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 06:51:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:51:35,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:35,760 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:35,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 06:51:35,977 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:35,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:35,977 INFO L82 PathProgramCache]: Analyzing trace with hash -88282549, now seen corresponding path program 3 times [2021-06-05 06:51:35,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:35,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851555270] [2021-06-05 06:51:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:36,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:36,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851555270] [2021-06-05 06:51:36,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851555270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:36,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704231894] [2021-06-05 06:51:36,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:51:36,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:51:36,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:36,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:51:36,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:36,440 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:51:36,440 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:51:36,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:36,447 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:51:36,447 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 36 [2021-06-05 06:51:36,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:36,485 INFO L628 ElimStorePlain]: treesize reduction 38, result has 54.8 percent of original size [2021-06-05 06:51:36,487 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 11 treesize of output 7 [2021-06-05 06:51:36,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:36,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:51:36,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:51:36,507 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:173, output treesize:27 [2021-06-05 06:51:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:36,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704231894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:36,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:36,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:51:36,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834916096] [2021-06-05 06:51:36,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:36,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:36,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:36,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:36,541 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:36,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:36,748 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-05 06:51:36,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:51:36,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:51:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:36,750 INFO L225 Difference]: With dead ends: 296 [2021-06-05 06:51:36,750 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 06:51:36,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:51:36,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 06:51:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-05 06:51:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 06:51:36,765 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 06:51:36,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:36,765 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 06:51:36,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 06:51:36,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:51:36,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:36,766 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:36,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 06:51:36,985 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1482543051, now seen corresponding path program 4 times [2021-06-05 06:51:36,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:36,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942284971] [2021-06-05 06:51:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:37,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:37,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942284971] [2021-06-05 06:51:37,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942284971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:37,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779549045] [2021-06-05 06:51:37,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:37,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:37,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:37,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:51:37,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:37,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:51:37,374 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:51:37,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:37,382 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:51:37,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 06:51:37,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:37,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:51:37,440 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:51:37,440 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:51:37,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:37,450 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:51:37,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2021-06-05 06:51:37,451 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:51:37,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:51:37,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:51:37,497 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:73 [2021-06-05 06:51:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:37,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779549045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:37,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:37,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:51:37,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150405573] [2021-06-05 06:51:37,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:37,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:37,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:37,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:37,613 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:37,941 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 06:51:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:51:37,942 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:51:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:37,943 INFO L225 Difference]: With dead ends: 425 [2021-06-05 06:51:37,943 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 06:51:37,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 436.3ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:51:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 06:51:37,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 06:51:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:37,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 06:51:37,950 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 06:51:37,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:37,950 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 06:51:37,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 06:51:37,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:37,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:37,951 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:38,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:38,167 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:38,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:38,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1258502875, now seen corresponding path program 5 times [2021-06-05 06:51:38,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:38,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073135320] [2021-06-05 06:51:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:38,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:38,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073135320] [2021-06-05 06:51:38,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073135320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:38,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204849466] [2021-06-05 06:51:38,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:38,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:51:38,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:38,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:38,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:38,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204849466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:38,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:38,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:51:38,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928081248] [2021-06-05 06:51:38,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:38,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:38,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:38,300 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:38,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:38,652 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 06:51:38,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:51:38,652 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:38,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:38,655 INFO L225 Difference]: With dead ends: 619 [2021-06-05 06:51:38,655 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 06:51:38,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:51:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 06:51:38,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 06:51:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:38,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 06:51:38,662 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 06:51:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:38,663 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 06:51:38,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 06:51:38,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:38,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:38,664 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:38,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 06:51:38,877 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:38,877 INFO L82 PathProgramCache]: Analyzing trace with hash 2060145577, now seen corresponding path program 6 times [2021-06-05 06:51:38,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:38,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118247122] [2021-06-05 06:51:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:38,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:38,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118247122] [2021-06-05 06:51:38,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118247122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:38,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427428551] [2021-06-05 06:51:38,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:38,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:51:38,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:38,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:38,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:39,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427428551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:39,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:39,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:39,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089780119] [2021-06-05 06:51:39,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:39,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:39,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:39,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:39,039 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:39,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:39,737 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 06:51:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:51:39,738 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:39,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:39,742 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 06:51:39,742 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 06:51:39,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:51:39,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 06:51:39,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 06:51:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 06:51:39,760 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 06:51:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:39,760 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 06:51:39,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 06:51:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:39,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:39,761 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:39,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 06:51:39,973 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:39,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:39,974 INFO L82 PathProgramCache]: Analyzing trace with hash -705917075, now seen corresponding path program 7 times [2021-06-05 06:51:39,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:39,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073503161] [2021-06-05 06:51:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:40,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:40,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073503161] [2021-06-05 06:51:40,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073503161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:40,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291503333] [2021-06-05 06:51:40,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:40,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:40,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:40,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291503333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:40,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:40,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:40,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890741122] [2021-06-05 06:51:40,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:40,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:40,114 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:40,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:40,712 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 06:51:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:51:40,712 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:40,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:40,715 INFO L225 Difference]: With dead ends: 951 [2021-06-05 06:51:40,715 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 06:51:40,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:51:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 06:51:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 06:51:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:40,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 06:51:40,724 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 06:51:40,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:40,725 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 06:51:40,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:40,725 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 06:51:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:40,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:40,725 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:40,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:40,941 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:40,941 INFO L82 PathProgramCache]: Analyzing trace with hash -731730967, now seen corresponding path program 1 times [2021-06-05 06:51:40,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:40,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501591719] [2021-06-05 06:51:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:40,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:40,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501591719] [2021-06-05 06:51:40,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501591719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:40,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279785326] [2021-06-05 06:51:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:41,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:51:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:41,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279785326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:41,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:41,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:51:41,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130886307] [2021-06-05 06:51:41,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:51:41,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:41,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:51:41,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:51:41,069 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:41,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:41,157 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 06:51:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:51:41,163 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:41,166 INFO L225 Difference]: With dead ends: 669 [2021-06-05 06:51:41,166 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 06:51:41,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:41,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 06:51:41,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 06:51:41,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:41,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 06:51:41,176 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 06:51:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:41,176 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 06:51:41,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 06:51:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:41,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:41,177 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:41,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 06:51:41,385 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:41,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:41,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1168699675, now seen corresponding path program 8 times [2021-06-05 06:51:41,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:41,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806934892] [2021-06-05 06:51:41,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:41,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:41,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806934892] [2021-06-05 06:51:41,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806934892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:41,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636090214] [2021-06-05 06:51:41,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:41,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:41,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:41,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:41,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:41,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636090214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:41,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:41,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:51:41,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873086931] [2021-06-05 06:51:41,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:41,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:41,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:41,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:41,531 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:41,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:41,678 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 06:51:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:51:41,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:41,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:41,680 INFO L225 Difference]: With dead ends: 710 [2021-06-05 06:51:41,680 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 06:51:41,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:51:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 06:51:41,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 06:51:41,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 06:51:41,690 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 06:51:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:41,691 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 06:51:41,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 06:51:41,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:41,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:41,692 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:41,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:41,912 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:41,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:41,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1874657007, now seen corresponding path program 2 times [2021-06-05 06:51:41,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:41,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511740724] [2021-06-05 06:51:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:41,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:41,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511740724] [2021-06-05 06:51:41,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511740724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:41,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037885711] [2021-06-05 06:51:41,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:41,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:41,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:41,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:51:41,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:42,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037885711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:42,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:42,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:51:42,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907654521] [2021-06-05 06:51:42,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:51:42,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:42,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:51:42,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:51:42,029 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:42,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:42,117 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 06:51:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:51:42,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:42,120 INFO L225 Difference]: With dead ends: 830 [2021-06-05 06:51:42,120 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 06:51:42,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:42,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 06:51:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 06:51:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 06:51:42,131 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 06:51:42,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:42,131 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 06:51:42,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:42,131 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 06:51:42,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:42,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:42,132 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:42,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:42,348 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:42,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:42,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1073628723, now seen corresponding path program 9 times [2021-06-05 06:51:42,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:42,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086416249] [2021-06-05 06:51:42,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:42,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:42,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086416249] [2021-06-05 06:51:42,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086416249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:42,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490375473] [2021-06-05 06:51:42,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:42,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:51:42,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:42,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:42,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:42,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490375473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:42,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:42,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:51:42,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142161103] [2021-06-05 06:51:42,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:51:42,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:42,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:51:42,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:51:42,488 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:42,765 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 06:51:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:51:42,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:42,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:42,769 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 06:51:42,769 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 06:51:42,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:51:42,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 06:51:42,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 06:51:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 06:51:42,783 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 06:51:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:42,783 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 06:51:42,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 06:51:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:42,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:42,784 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:43,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 06:51:43,002 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:43,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1858542817, now seen corresponding path program 10 times [2021-06-05 06:51:43,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:43,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832127460] [2021-06-05 06:51:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:43,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:43,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832127460] [2021-06-05 06:51:43,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832127460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:43,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895589598] [2021-06-05 06:51:43,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:43,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:43,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:43,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:43,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:43,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895589598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:43,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:43,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:51:43,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394817809] [2021-06-05 06:51:43,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:51:43,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:43,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:51:43,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:51:43,128 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:43,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:43,506 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 06:51:43,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:51:43,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:43,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:43,512 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 06:51:43,512 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 06:51:43,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 239.3ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:51:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 06:51:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 06:51:43,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 06:51:43,531 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 06:51:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:43,531 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 06:51:43,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 06:51:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:43,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:43,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:43,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:43,757 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:43,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:43,757 INFO L82 PathProgramCache]: Analyzing trace with hash 775520161, now seen corresponding path program 11 times [2021-06-05 06:51:43,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:43,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873817275] [2021-06-05 06:51:43,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:43,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:43,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873817275] [2021-06-05 06:51:43,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873817275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:43,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501712160] [2021-06-05 06:51:43,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:43,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:43,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:43,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:43,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:43,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501712160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:43,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:43,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:51:43,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035488296] [2021-06-05 06:51:43,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:43,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:43,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:43,953 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:44,225 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2021-06-05 06:51:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:44,372 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 06:51:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:51:44,373 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:44,377 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 06:51:44,377 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 06:51:44,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:51:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 06:51:44,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 06:51:44,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 06:51:44,392 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 06:51:44,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:44,392 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 06:51:44,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:44,392 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 06:51:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:44,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:44,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:44,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 06:51:44,609 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:44,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:44,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2048369017, now seen corresponding path program 12 times [2021-06-05 06:51:44,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:44,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306709015] [2021-06-05 06:51:44,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:44,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:44,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306709015] [2021-06-05 06:51:44,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306709015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:44,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518821802] [2021-06-05 06:51:44,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:51:44,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:51:44,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:44,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:44,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:44,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518821802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:44,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:44,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:51:44,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733874235] [2021-06-05 06:51:44,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:44,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:44,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:44,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:44,866 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:45,087 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 06:51:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:51:45,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:45,092 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 06:51:45,092 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 06:51:45,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:51:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 06:51:45,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 06:51:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 06:51:45,106 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 06:51:45,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:45,106 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 06:51:45,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 06:51:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:45,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:45,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:45,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:45,321 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:45,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1490304735, now seen corresponding path program 13 times [2021-06-05 06:51:45,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:45,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24887506] [2021-06-05 06:51:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:45,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:45,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24887506] [2021-06-05 06:51:45,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24887506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:45,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615970070] [2021-06-05 06:51:45,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:45,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:45,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:45,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615970070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:45,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:45,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:51:45,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341361120] [2021-06-05 06:51:45,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:51:45,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:45,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:51:45,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:51:45,506 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:46,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:46,324 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 06:51:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:51:46,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:46,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:46,329 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 06:51:46,330 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 06:51:46,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:51:46,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 06:51:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 06:51:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 06:51:46,363 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 06:51:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:46,363 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 06:51:46,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 06:51:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:46,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:46,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:46,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 06:51:46,580 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1541712485, now seen corresponding path program 14 times [2021-06-05 06:51:46,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:46,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860377091] [2021-06-05 06:51:46,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:46,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:46,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860377091] [2021-06-05 06:51:46,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860377091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:46,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840917060] [2021-06-05 06:51:46,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:46,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:46,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:46,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:46,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:46,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840917060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:46,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:46,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:46,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674146447] [2021-06-05 06:51:46,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:46,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:46,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:46,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:46,715 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:47,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:47,425 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 06:51:47,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:51:47,425 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:47,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:47,434 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 06:51:47,435 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 06:51:47,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:51:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 06:51:47,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 06:51:47,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 06:51:47,459 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 06:51:47,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:47,459 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 06:51:47,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:47,459 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 06:51:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:47,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:47,460 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:47,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 06:51:47,676 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:47,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1224350167, now seen corresponding path program 15 times [2021-06-05 06:51:47,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:47,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422831710] [2021-06-05 06:51:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:47,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:47,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422831710] [2021-06-05 06:51:47,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422831710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:47,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296312987] [2021-06-05 06:51:47,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:47,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:51:47,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:47,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:47,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:47,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296312987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:47,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:47,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:47,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503191994] [2021-06-05 06:51:47,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:47,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:47,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:47,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:47,824 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:48,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:48,492 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 06:51:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:51:48,492 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:48,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:48,498 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 06:51:48,498 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 06:51:48,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:51:48,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 06:51:48,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 06:51:48,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 06:51:48,522 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 06:51:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:48,522 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 06:51:48,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 06:51:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:48,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:48,524 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:48,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:48,737 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:48,737 INFO L82 PathProgramCache]: Analyzing trace with hash 936318707, now seen corresponding path program 16 times [2021-06-05 06:51:48,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:48,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751055105] [2021-06-05 06:51:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:48,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:48,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751055105] [2021-06-05 06:51:48,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751055105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:48,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529998903] [2021-06-05 06:51:48,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:48,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:48,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:48,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:48,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:48,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529998903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:48,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:48,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:51:48,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261831458] [2021-06-05 06:51:48,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:48,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:48,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:48,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:48,850 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:49,423 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 06:51:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:51:49,424 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:49,431 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 06:51:49,432 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 06:51:49,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:51:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 06:51:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 06:51:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 06:51:49,453 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 06:51:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:49,453 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 06:51:49,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:49,453 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 06:51:49,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:49,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:49,454 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:49,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 06:51:49,670 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:49,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:49,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2008635681, now seen corresponding path program 17 times [2021-06-05 06:51:49,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:49,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920759706] [2021-06-05 06:51:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:49,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:49,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920759706] [2021-06-05 06:51:49,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920759706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:49,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953683944] [2021-06-05 06:51:49,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:49,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:51:49,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:49,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:49,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:49,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953683944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:49,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:49,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:51:49,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475371081] [2021-06-05 06:51:49,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:49,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:49,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:49,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:49,791 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:50,269 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 06:51:50,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:51:50,270 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:50,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:50,274 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 06:51:50,274 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 06:51:50,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:51:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 06:51:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 06:51:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 06:51:50,296 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 06:51:50,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:50,296 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 06:51:50,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 06:51:50,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:50,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:50,298 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:50,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:50,511 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:50,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:50,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2817957, now seen corresponding path program 18 times [2021-06-05 06:51:50,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:50,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541709778] [2021-06-05 06:51:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:50,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:50,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541709778] [2021-06-05 06:51:50,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541709778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:50,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879093994] [2021-06-05 06:51:50,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:50,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:51:50,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:50,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:50,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:50,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879093994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:50,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:50,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:50,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684205910] [2021-06-05 06:51:50,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:50,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:50,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:50,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:50,693 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-05 06:51:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:51,256 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 06:51:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:51:51,257 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 24 [2021-06-05 06:51:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:51,262 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 06:51:51,262 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 06:51:51,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 361.4ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:51:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 06:51:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 06:51:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 06:51:51,283 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 06:51:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:51,283 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 06:51:51,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-05 06:51:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 06:51:51,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:51,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:51,284 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:51,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 06:51:51,500 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:51,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:51,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1052559437, now seen corresponding path program 19 times [2021-06-05 06:51:51,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:51,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909584831] [2021-06-05 06:51:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:51,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:51,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909584831] [2021-06-05 06:51:51,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909584831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:51,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492646984] [2021-06-05 06:51:51,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:51,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:51,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:51,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492646984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:51,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:51,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:51,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622450368] [2021-06-05 06:51:51,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:51,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:51,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:51,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:51,622 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-05 06:51:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:52,154 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 06:51:52,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:51:52,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 24 [2021-06-05 06:51:52,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:52,158 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 06:51:52,158 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 06:51:52,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 297.8ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:51:52,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 06:51:52,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 06:51:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 06:51:52,179 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 06:51:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:52,179 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 06:51:52,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-05 06:51:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 06:51:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:52,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:52,181 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:52,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 06:51:52,397 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:52,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1615861683, now seen corresponding path program 3 times [2021-06-05 06:51:52,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:52,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573804729] [2021-06-05 06:51:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:52,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:52,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573804729] [2021-06-05 06:51:52,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573804729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:52,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420156327] [2021-06-05 06:51:52,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:52,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:51:52,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:52,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:51:52,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:52,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420156327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:52,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:52,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:51:52,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456157324] [2021-06-05 06:51:52,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:51:52,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:52,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:51:52,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:51:52,518 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:52,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:52,589 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 06:51:52,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:51:52,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:52,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:52,591 INFO L225 Difference]: With dead ends: 929 [2021-06-05 06:51:52,591 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 06:51:52,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:52,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 06:51:52,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 06:51:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 06:51:52,601 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 06:51:52,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:52,602 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 06:51:52,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:52,602 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 06:51:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:52,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:52,603 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:52,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:52,813 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:52,813 INFO L82 PathProgramCache]: Analyzing trace with hash -685661939, now seen corresponding path program 20 times [2021-06-05 06:51:52,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:52,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10058024] [2021-06-05 06:51:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:52,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:52,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10058024] [2021-06-05 06:51:52,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10058024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:52,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005312064] [2021-06-05 06:51:52,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:52,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:52,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:52,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:52,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:52,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005312064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:52,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:52,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 06:51:52,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584991141] [2021-06-05 06:51:52,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:51:52,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:52,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:51:52,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:51:52,917 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:53,172 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 06:51:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:51:53,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:53,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:53,174 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 06:51:53,174 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 06:51:53,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:51:53,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 06:51:53,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 06:51:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 06:51:53,188 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 06:51:53,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:53,188 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 06:51:53,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:53,189 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 06:51:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:53,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:53,190 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:53,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 06:51:53,391 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:53,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:53,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1217017513, now seen corresponding path program 21 times [2021-06-05 06:51:53,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:53,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974048733] [2021-06-05 06:51:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:53,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:53,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974048733] [2021-06-05 06:51:53,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974048733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:53,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25601156] [2021-06-05 06:51:53,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:53,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:51:53,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:53,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:53,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:53,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25601156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:53,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:53,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 06:51:53,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270763608] [2021-06-05 06:51:53,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:51:53,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:53,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:51:53,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:51:53,485 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:53,704 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 06:51:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:51:53,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:53,707 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 06:51:53,707 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 06:51:53,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:51:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 06:51:53,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 06:51:53,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:53,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 06:51:53,724 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 06:51:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:53,724 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 06:51:53,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:53,725 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 06:51:53,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:53,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:53,726 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:53,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:53,937 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:53,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:53,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2131830039, now seen corresponding path program 22 times [2021-06-05 06:51:53,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:53,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058875565] [2021-06-05 06:51:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:53,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:53,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058875565] [2021-06-05 06:51:53,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058875565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:53,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957298834] [2021-06-05 06:51:53,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:53,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:53,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:53,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:53,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:54,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957298834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:54,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:54,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 06:51:54,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894505266] [2021-06-05 06:51:54,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:51:54,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:54,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:51:54,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:51:54,028 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:54,192 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 06:51:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:51:54,193 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:54,194 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 06:51:54,194 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 06:51:54,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:51:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 06:51:54,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 06:51:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 06:51:54,207 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 06:51:54,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:54,207 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 06:51:54,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 06:51:54,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:54,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:54,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:54,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 06:51:54,412 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:54,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:54,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1241435117, now seen corresponding path program 23 times [2021-06-05 06:51:54,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:54,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137468690] [2021-06-05 06:51:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:54,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:54,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137468690] [2021-06-05 06:51:54,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137468690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:54,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852410663] [2021-06-05 06:51:54,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:54,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:51:54,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:54,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:54,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:54,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852410663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:54,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:54,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 06:51:54,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791622639] [2021-06-05 06:51:54,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:51:54,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:54,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:51:54,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:51:54,521 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:54,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:54,711 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 06:51:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:51:54,712 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:54,714 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 06:51:54,714 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 06:51:54,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:51:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 06:51:54,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 06:51:54,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 06:51:54,726 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 06:51:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:54,726 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 06:51:54,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 06:51:54,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:54,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:54,728 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:54,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 06:51:54,931 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:54,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:54,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1243112745, now seen corresponding path program 24 times [2021-06-05 06:51:54,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:54,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467115790] [2021-06-05 06:51:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:54,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:54,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467115790] [2021-06-05 06:51:54,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467115790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:54,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120342884] [2021-06-05 06:51:54,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:54,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:51:54,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:54,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:54,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:55,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120342884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:55,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:55,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:55,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924591387] [2021-06-05 06:51:55,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:55,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:55,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:55,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:55,066 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:55,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:55,504 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 06:51:55,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:51:55,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:55,507 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 06:51:55,507 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 06:51:55,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:51:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 06:51:55,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 06:51:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 06:51:55,525 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 06:51:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:55,525 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 06:51:55,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 06:51:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:55,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:55,526 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:55,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:55,734 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:55,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:55,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1522949907, now seen corresponding path program 25 times [2021-06-05 06:51:55,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:55,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085176022] [2021-06-05 06:51:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:55,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:55,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085176022] [2021-06-05 06:51:55,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085176022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:55,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422810433] [2021-06-05 06:51:55,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:55,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:55,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:55,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422810433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:55,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:55,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:55,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199427449] [2021-06-05 06:51:55,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:55,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:55,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:55,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:55,869 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:56,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:56,321 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 06:51:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:51:56,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:56,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:56,324 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 06:51:56,324 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 06:51:56,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:51:56,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 06:51:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 06:51:56,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:56,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 06:51:56,344 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 06:51:56,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:56,344 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 06:51:56,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 06:51:56,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:56,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:56,346 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:56,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:56,562 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:56,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:56,562 INFO L82 PathProgramCache]: Analyzing trace with hash 637718967, now seen corresponding path program 26 times [2021-06-05 06:51:56,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:56,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148176185] [2021-06-05 06:51:56,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:56,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:56,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148176185] [2021-06-05 06:51:56,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148176185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:56,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946989626] [2021-06-05 06:51:56,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:56,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:56,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:56,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:56,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:56,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946989626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:56,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:56,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:51:56,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764862921] [2021-06-05 06:51:56,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:56,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:56,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:56,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:56,679 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:57,070 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 06:51:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:51:57,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:57,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:57,073 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 06:51:57,073 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 06:51:57,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:51:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 06:51:57,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 06:51:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 06:51:57,093 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 06:51:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:57,093 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 06:51:57,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 06:51:57,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:57,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:57,094 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:57,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:57,297 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:57,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:57,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1710035941, now seen corresponding path program 27 times [2021-06-05 06:51:57,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:57,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087163841] [2021-06-05 06:51:57,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:57,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:57,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087163841] [2021-06-05 06:51:57,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087163841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:57,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862498682] [2021-06-05 06:51:57,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:57,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:51:57,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:57,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:57,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862498682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:57,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:57,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:51:57,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786414874] [2021-06-05 06:51:57,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:57,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:57,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:57,402 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:57,706 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 06:51:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:51:57,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:57,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:57,709 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 06:51:57,709 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 06:51:57,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:51:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 06:51:57,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 06:51:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 06:51:57,726 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 06:51:57,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:57,726 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 06:51:57,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:57,726 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 06:51:57,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:57,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:57,727 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:57,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:57,928 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:57,928 INFO L82 PathProgramCache]: Analyzing trace with hash -295781783, now seen corresponding path program 28 times [2021-06-05 06:51:57,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:57,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085660916] [2021-06-05 06:51:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:57,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:57,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085660916] [2021-06-05 06:51:57,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085660916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:57,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176359949] [2021-06-05 06:51:57,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:57,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:57,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:57,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:57,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:58,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176359949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:58,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:58,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:58,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273832048] [2021-06-05 06:51:58,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:58,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:58,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:58,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:58,047 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-05 06:51:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:58,391 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 06:51:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:51:58,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 24 [2021-06-05 06:51:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:58,394 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 06:51:58,394 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 06:51:58,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:51:58,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 06:51:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 06:51:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 06:51:58,411 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 06:51:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:58,411 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 06:51:58,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-05 06:51:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 06:51:58,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:58,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:58,413 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:58,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:58,613 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:58,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:58,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1351159177, now seen corresponding path program 29 times [2021-06-05 06:51:58,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:58,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087292656] [2021-06-05 06:51:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:58,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:58,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087292656] [2021-06-05 06:51:58,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087292656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:58,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358749419] [2021-06-05 06:51:58,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:58,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:51:58,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:58,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:58,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:58,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358749419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:58,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:58,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:51:58,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600299605] [2021-06-05 06:51:58,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:58,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:58,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:58,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:58,741 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-05 06:51:59,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:59,046 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 06:51:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:51:59,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 24 [2021-06-05 06:51:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:59,050 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 06:51:59,050 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 06:51:59,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:51:59,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 06:51:59,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 06:51:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 06:51:59,068 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 06:51:59,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:59,069 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 06:51:59,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-05 06:51:59,069 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 06:51:59,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:59,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:59,070 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:59,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 06:51:59,285 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:59,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1252113, now seen corresponding path program 30 times [2021-06-05 06:51:59,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:59,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392079476] [2021-06-05 06:51:59,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:59,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:59,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392079476] [2021-06-05 06:51:59,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392079476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:59,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274775570] [2021-06-05 06:51:59,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:59,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:51:59,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:59,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:59,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:59,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274775570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:59,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:59,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:51:59,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785055928] [2021-06-05 06:51:59,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:51:59,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:59,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:51:59,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:51:59,394 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:59,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:59,692 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 06:51:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:51:59,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:51:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:59,694 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 06:51:59,695 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 06:51:59,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:51:59,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 06:51:59,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 06:51:59,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 06:51:59,712 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 06:51:59,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:59,712 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 06:51:59,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 06:51:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:51:59,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:59,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:59,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:59,914 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:59,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1073569087, now seen corresponding path program 31 times [2021-06-05 06:51:59,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:59,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844471295] [2021-06-05 06:51:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:59,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:59,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844471295] [2021-06-05 06:51:59,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844471295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:59,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972574078] [2021-06-05 06:51:59,941 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 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 [2021-06-05 06:51:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:59,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:59,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:00,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972574078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:00,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:00,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:52:00,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810168562] [2021-06-05 06:52:00,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:00,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:00,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:00,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:00,013 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:00,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:00,275 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 06:52:00,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:52:00,275 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:52:00,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:00,277 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 06:52:00,277 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 06:52:00,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:52:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 06:52:00,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 06:52:00,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 06:52:00,294 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 06:52:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:00,294 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 06:52:00,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:00,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 06:52:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:52:00,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:00,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:00,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 06:52:00,512 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:00,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:00,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1960561683, now seen corresponding path program 32 times [2021-06-05 06:52:00,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:00,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651786119] [2021-06-05 06:52:00,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:00,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:00,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651786119] [2021-06-05 06:52:00,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651786119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:00,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862758588] [2021-06-05 06:52:00,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:00,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:00,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:52:00,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:00,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862758588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:00,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:00,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:52:00,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19206143] [2021-06-05 06:52:00,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:00,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:00,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:00,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:00,609 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:00,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:00,804 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 06:52:00,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:52:00,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:52:00,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:00,806 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 06:52:00,806 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 06:52:00,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:52:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 06:52:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 06:52:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 06:52:00,821 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 06:52:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:00,821 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 06:52:00,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:00,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 06:52:00,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:52:00,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:00,822 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:01,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:01,037 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:01,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:01,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1288275347, now seen corresponding path program 33 times [2021-06-05 06:52:01,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:01,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397107087] [2021-06-05 06:52:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:01,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:01,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:01,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397107087] [2021-06-05 06:52:01,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397107087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:01,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921418432] [2021-06-05 06:52:01,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:01,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:52:01,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:01,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:52:01,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:01,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921418432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:01,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:01,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:52:01,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730713353] [2021-06-05 06:52:01,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:01,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:01,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:01,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:01,168 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-05 06:52:01,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:01,462 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 06:52:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:52:01,462 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 24 [2021-06-05 06:52:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:01,465 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 06:52:01,465 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 06:52:01,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:52:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 06:52:01,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 06:52:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 06:52:01,483 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 06:52:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:01,483 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 06:52:01,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-05 06:52:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 06:52:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:52:01,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:01,485 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:01,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 06:52:01,701 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:01,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:01,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1951314555, now seen corresponding path program 34 times [2021-06-05 06:52:01,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:01,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777045425] [2021-06-05 06:52:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:01,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:01,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777045425] [2021-06-05 06:52:01,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777045425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:01,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278115542] [2021-06-05 06:52:01,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:52:01,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:52:01,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:01,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:52:01,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:01,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278115542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:01,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:01,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:52:01,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243263285] [2021-06-05 06:52:01,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:01,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:01,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:01,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:01,828 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-05 06:52:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:02,084 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 06:52:02,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:52:02,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 24 [2021-06-05 06:52:02,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:02,086 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 06:52:02,086 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 06:52:02,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:52:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 06:52:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 06:52:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 06:52:02,102 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 06:52:02,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:02,102 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 06:52:02,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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) [2021-06-05 06:52:02,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 06:52:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:52:02,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:02,103 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:02,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:02,304 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:02,304 INFO L82 PathProgramCache]: Analyzing trace with hash -860517803, now seen corresponding path program 35 times [2021-06-05 06:52:02,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:02,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442497985] [2021-06-05 06:52:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:02,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:02,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442497985] [2021-06-05 06:52:02,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442497985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:02,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546996562] [2021-06-05 06:52:02,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:02,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:52:02,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:02,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:52:02,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:02,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546996562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:02,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:02,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:52:02,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300710445] [2021-06-05 06:52:02,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:52:02,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:02,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:52:02,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:52:02,407 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-06-05 06:52:02,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:02,552 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 06:52:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:52:02,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:52:02,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:02,554 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 06:52:02,555 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 06:52:02,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:52:02,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 06:52:02,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 06:52:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 06:52:02,569 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 06:52:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:02,569 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 06:52:02,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-06-05 06:52:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 06:52:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:02,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:02,571 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:02,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:02,786 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:02,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:02,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1270661831, now seen corresponding path program 4 times [2021-06-05 06:52:02,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:02,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874558506] [2021-06-05 06:52:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:03,135 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-06-05 06:52:03,329 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 06:52:03,547 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-06-05 06:52:03,720 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 06:52:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:03,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:03,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874558506] [2021-06-05 06:52:03,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874558506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:03,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003752194] [2021-06-05 06:52:03,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:03,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:52:03,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:03,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:52:03,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:04,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:52:04,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:52:04,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:52:04,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:52:04,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:52:04,395 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:52:04,404 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:52:04,411 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:52:04,417 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 06:52:04,424 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:52:04,432 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:52:04,440 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 06:52:04,446 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:52:04,453 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:52:04,459 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:52:04,465 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:04,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:04,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:52:04,478 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:04,550 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-05 06:52:04,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:52:04,551 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 06:52:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:04,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003752194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:04,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:04,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:52:04,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827621672] [2021-06-05 06:52:04,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:52:04,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:04,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:52:04,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:52:04,594 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:05,300 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-05 06:52:05,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:05,588 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 06:52:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:52:05,589 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:05,591 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 06:52:05,591 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 06:52:05,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1790.2ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:52:05,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 06:52:05,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 06:52:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:05,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 06:52:05,607 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 06:52:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:05,607 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 06:52:05,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 06:52:05,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:05,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:05,608 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:05,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:05,825 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:05,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:05,825 INFO L82 PathProgramCache]: Analyzing trace with hash -757736185, now seen corresponding path program 5 times [2021-06-05 06:52:05,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:05,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624769920] [2021-06-05 06:52:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:06,218 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 06:52:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:06,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:06,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624769920] [2021-06-05 06:52:06,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624769920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:06,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955981164] [2021-06-05 06:52:06,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:06,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:52:06,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:06,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:52:06,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:07,046 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 06:52:07,086 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_5], 3=[v_prenex_9, v_prenex_7]} [2021-06-05 06:52:07,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:07,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:07,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:07,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:52:07,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:07,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:07,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:07,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 06:52:07,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:07,223 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-05 06:52:07,223 INFO L628 ElimStorePlain]: treesize reduction 73, result has 74.2 percent of original size [2021-06-05 06:52:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:07,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:07,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:52:07,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:07,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:07,281 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 06:52:07,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 54 [2021-06-05 06:52:07,284 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:07,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:07,329 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 06:52:07,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 42 [2021-06-05 06:52:07,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:07,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:07,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:52:07,381 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:322, output treesize:59 [2021-06-05 06:52:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:07,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955981164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:07,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:07,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:52:07,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114279279] [2021-06-05 06:52:07,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:52:07,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:07,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:52:07,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:52:07,456 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:07,878 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 62 [2021-06-05 06:52:08,102 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-05 06:52:08,334 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-06-05 06:52:08,540 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-05 06:52:08,710 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 06:52:08,894 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-06-05 06:52:09,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:09,300 INFO L93 Difference]: Finished difference Result 1563 states and 5076 transitions. [2021-06-05 06:52:09,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:52:09,300 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:09,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:09,303 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 06:52:09,303 INFO L226 Difference]: Without dead ends: 1533 [2021-06-05 06:52:09,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2362.1ms TimeCoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:52:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-06-05 06:52:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1150. [2021-06-05 06:52:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:09,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-05 06:52:09,318 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-05 06:52:09,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:09,319 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-05 06:52:09,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:09,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-05 06:52:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:09,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:09,321 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:09,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:09,537 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:09,537 INFO L82 PathProgramCache]: Analyzing trace with hash 833693123, now seen corresponding path program 36 times [2021-06-05 06:52:09,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:09,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340382439] [2021-06-05 06:52:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:10,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:10,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340382439] [2021-06-05 06:52:10,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340382439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:10,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448179391] [2021-06-05 06:52:10,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:10,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:52:10,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:10,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:52:10,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:10,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 06:52:10,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 06:52:10,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 06:52:10,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 06:52:10,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 06:52:10,717 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 06:52:10,725 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 06:52:10,735 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:52:10,744 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:52:10,755 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 06:52:10,765 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:52:10,774 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 06:52:10,783 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 06:52:10,793 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 06:52:10,801 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:52:10,809 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:10,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:10,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 06:52:10,815 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,837 INFO L628 ElimStorePlain]: treesize reduction 60, result has 24.1 percent of original size [2021-06-05 06:52:10,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:52:10,839 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:13 [2021-06-05 06:52:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:10,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448179391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:10,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:10,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:52:10,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088905751] [2021-06-05 06:52:10,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:52:10,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:10,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:52:10,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:52:10,865 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:11,571 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-06-05 06:52:12,241 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-06-05 06:52:12,400 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2021-06-05 06:52:12,557 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-06-05 06:52:12,875 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-06-05 06:52:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:12,952 INFO L93 Difference]: Finished difference Result 1615 states and 5216 transitions. [2021-06-05 06:52:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:52:12,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:12,954 INFO L225 Difference]: With dead ends: 1615 [2021-06-05 06:52:12,954 INFO L226 Difference]: Without dead ends: 1600 [2021-06-05 06:52:12,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2263.0ms TimeCoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:52:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-05 06:52:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1180. [2021-06-05 06:52:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-05 06:52:12,969 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-05 06:52:12,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:12,969 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-05 06:52:12,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:12,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-05 06:52:12,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:12,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:12,971 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:13,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 06:52:13,171 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:13,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:13,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1638740299, now seen corresponding path program 6 times [2021-06-05 06:52:13,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:13,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954752160] [2021-06-05 06:52:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:13,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:13,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954752160] [2021-06-05 06:52:13,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954752160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:13,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156601653] [2021-06-05 06:52:13,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:52:13,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:52:13,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:13,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:52:13,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:14,255 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-05 06:52:14,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:14,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:14,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:52:14,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:14,426 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 06:52:14,426 INFO L628 ElimStorePlain]: treesize reduction 65, result has 72.6 percent of original size [2021-06-05 06:52:14,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:14,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:14,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:14,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 06:52:14,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:14,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:14,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 06:52:14,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:14,523 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.8 percent of original size [2021-06-05 06:52:14,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:14,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:14,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:52:14,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:14,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:14,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:14,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:14,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:52:14,585 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:14,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:14,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:52:14,621 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-05 06:52:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:14,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156601653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:14,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:14,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:52:14,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845298363] [2021-06-05 06:52:14,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:52:14,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:14,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:52:14,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:52:14,708 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:14,897 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-06-05 06:52:15,638 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 06:52:15,944 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-05 06:52:16,110 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-05 06:52:16,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:16,199 INFO L93 Difference]: Finished difference Result 1620 states and 5225 transitions. [2021-06-05 06:52:16,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:52:16,200 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:16,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:16,202 INFO L225 Difference]: With dead ends: 1620 [2021-06-05 06:52:16,202 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 06:52:16,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2051.7ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:52:16,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 06:52:16,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1189. [2021-06-05 06:52:16,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.3383838383838382) internal successors, (3966), 1188 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3966 transitions. [2021-06-05 06:52:16,217 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3966 transitions. Word has length 26 [2021-06-05 06:52:16,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:16,217 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3966 transitions. [2021-06-05 06:52:16,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:16,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3966 transitions. [2021-06-05 06:52:16,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:16,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:16,219 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:16,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:16,420 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:16,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1105845433, now seen corresponding path program 37 times [2021-06-05 06:52:16,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:16,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598821687] [2021-06-05 06:52:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:16,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:16,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598821687] [2021-06-05 06:52:16,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598821687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:16,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303817600] [2021-06-05 06:52:16,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:16,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:52:16,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:17,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 06:52:17,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 06:52:17,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 06:52:17,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 06:52:17,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 06:52:17,578 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:52:17,587 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 06:52:17,597 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 06:52:17,606 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:52:17,615 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:52:17,631 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 06:52:17,640 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 06:52:17,649 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 06:52:17,657 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 06:52:17,664 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 06:52:17,672 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:17,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:17,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:52:17,677 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:17,712 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-06-05 06:52:17,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:52:17,713 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-06-05 06:52:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:17,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303817600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:17,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:17,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:52:17,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705465278] [2021-06-05 06:52:17,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:52:17,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:17,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:52:17,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:52:17,747 INFO L87 Difference]: Start difference. First operand 1189 states and 3966 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:18,993 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2021-06-05 06:52:19,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:19,830 INFO L93 Difference]: Finished difference Result 1800 states and 5747 transitions. [2021-06-05 06:52:19,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:52:19,830 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:19,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:19,833 INFO L225 Difference]: With dead ends: 1800 [2021-06-05 06:52:19,833 INFO L226 Difference]: Without dead ends: 1785 [2021-06-05 06:52:19,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2191.9ms TimeCoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:52:19,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-06-05 06:52:19,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1201. [2021-06-05 06:52:19,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3466666666666667) internal successors, (4016), 1200 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:19,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4016 transitions. [2021-06-05 06:52:19,848 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4016 transitions. Word has length 26 [2021-06-05 06:52:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:19,849 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 4016 transitions. [2021-06-05 06:52:19,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4016 transitions. [2021-06-05 06:52:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:19,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:19,850 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:20,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 06:52:20,051 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:20,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2082164277, now seen corresponding path program 38 times [2021-06-05 06:52:20,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:20,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631140491] [2021-06-05 06:52:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:20,411 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 06:52:20,532 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-05 06:52:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:20,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:20,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631140491] [2021-06-05 06:52:20,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631140491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:20,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016024430] [2021-06-05 06:52:20,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:20,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:20,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:20,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:52:20,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:21,143 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-06-05 06:52:21,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 48 [2021-06-05 06:52:21,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:21,209 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-06-05 06:52:21,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 51 [2021-06-05 06:52:21,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:21,275 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-06-05 06:52:21,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 59 [2021-06-05 06:52:21,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:21,361 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-06-05 06:52:21,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 41 [2021-06-05 06:52:21,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:21,407 INFO L354 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2021-06-05 06:52:21,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 41 [2021-06-05 06:52:21,425 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 06:52:21,448 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 06:52:21,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 06:52:21,449 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:21,501 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-06-05 06:52:21,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-06-05 06:52:21,526 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:21,585 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 06:52:21,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 68 [2021-06-05 06:52:21,620 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:21,662 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-06-05 06:52:21,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 34 [2021-06-05 06:52:21,663 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:21,716 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-06-05 06:52:21,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 52 [2021-06-05 06:52:21,721 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:21,742 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 06:52:21,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 06:52:21,743 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:21,764 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 06:52:21,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 06:52:21,765 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:21,809 INFO L354 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2021-06-05 06:52:21,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 46 [2021-06-05 06:52:21,812 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:21,849 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-06-05 06:52:21,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 33 [2021-06-05 06:52:21,861 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:21,887 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 06:52:21,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:52:21,887 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:21,930 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-06-05 06:52:21,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-06-05 06:52:21,939 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:22,584 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 82 [2021-06-05 06:52:22,584 INFO L628 ElimStorePlain]: treesize reduction 415, result has 49.6 percent of original size [2021-06-05 06:52:22,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:52:22,598 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1105, output treesize:408 [2021-06-05 06:52:22,854 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 06:52:23,024 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 06:52:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:23,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016024430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:23,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:23,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:52:23,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039405366] [2021-06-05 06:52:23,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:52:23,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:23,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:52:23,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:52:23,103 INFO L87 Difference]: Start difference. First operand 1201 states and 4016 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:23,558 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 06:52:24,150 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 06:52:24,396 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-05 06:52:25,558 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 64 [2021-06-05 06:52:25,700 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 06:52:25,971 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 54 [2021-06-05 06:52:26,469 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-06-05 06:52:26,950 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2021-06-05 06:52:27,296 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2021-06-05 06:52:27,545 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 06:52:28,077 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 114 [2021-06-05 06:52:28,713 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 107 [2021-06-05 06:52:29,194 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 113 [2021-06-05 06:52:29,729 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 97 [2021-06-05 06:52:30,377 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 105 [2021-06-05 06:52:30,561 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 06:52:30,762 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 06:52:30,961 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-05 06:52:31,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:31,089 INFO L93 Difference]: Finished difference Result 2410 states and 7510 transitions. [2021-06-05 06:52:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 06:52:31,089 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:31,092 INFO L225 Difference]: With dead ends: 2410 [2021-06-05 06:52:31,093 INFO L226 Difference]: Without dead ends: 2365 [2021-06-05 06:52:31,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 8185.5ms TimeCoverageRelationStatistics Valid=726, Invalid=3966, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:52:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-06-05 06:52:31,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1341. [2021-06-05 06:52:31,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.3007462686567166) internal successors, (4423), 1340 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4423 transitions. [2021-06-05 06:52:31,112 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4423 transitions. Word has length 26 [2021-06-05 06:52:31,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:31,112 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 4423 transitions. [2021-06-05 06:52:31,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:31,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4423 transitions. [2021-06-05 06:52:31,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:31,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:31,114 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:31,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:31,314 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:31,314 INFO L82 PathProgramCache]: Analyzing trace with hash 127735791, now seen corresponding path program 7 times [2021-06-05 06:52:31,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:31,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18245002] [2021-06-05 06:52:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:31,644 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-06-05 06:52:31,825 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 06:52:32,003 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 06:52:32,175 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 06:52:32,320 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-05 06:52:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:32,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:32,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18245002] [2021-06-05 06:52:32,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18245002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:32,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205120509] [2021-06-05 06:52:32,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:32,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:52:32,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:32,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:52:32,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:52:32,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:52:32,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:52:32,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:52:32,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:52:32,839 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:52:32,845 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:52:32,851 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:52:32,857 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:52:32,864 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 06:52:32,870 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:52:32,878 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:52:32,884 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:52:32,890 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 06:52:32,896 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:32,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:32,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:52:32,901 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:32,961 INFO L628 ElimStorePlain]: treesize reduction 71, result has 47.4 percent of original size [2021-06-05 06:52:32,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:52:32,963 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 06:52:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:33,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205120509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:33,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:33,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:52:33,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893781940] [2021-06-05 06:52:33,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:52:33,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:33,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:52:33,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:52:33,014 INFO L87 Difference]: Start difference. First operand 1341 states and 4423 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:33,688 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-06-05 06:52:33,928 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-05 06:52:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:34,249 INFO L93 Difference]: Finished difference Result 1736 states and 5612 transitions. [2021-06-05 06:52:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:52:34,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:34,252 INFO L225 Difference]: With dead ends: 1736 [2021-06-05 06:52:34,252 INFO L226 Difference]: Without dead ends: 1721 [2021-06-05 06:52:34,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1949.6ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:52:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-06-05 06:52:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1352. [2021-06-05 06:52:34,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.298297557364915) internal successors, (4456), 1351 states have internal predecessors, (4456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4456 transitions. [2021-06-05 06:52:34,277 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4456 transitions. Word has length 26 [2021-06-05 06:52:34,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:34,277 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4456 transitions. [2021-06-05 06:52:34,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:34,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4456 transitions. [2021-06-05 06:52:34,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:34,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:34,279 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:34,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 06:52:34,493 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:34,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1900662225, now seen corresponding path program 8 times [2021-06-05 06:52:34,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:34,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213550428] [2021-06-05 06:52:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:34,802 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 06:52:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:35,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:35,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213550428] [2021-06-05 06:52:35,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213550428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:35,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99289964] [2021-06-05 06:52:35,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:35,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:35,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:35,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:52:35,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:35,488 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-05 06:52:35,596 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:52:35,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-06-05 06:52:35,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:35,757 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2021-06-05 06:52:35,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:35,795 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:52:35,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 75 [2021-06-05 06:52:35,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:35,955 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-05 06:52:35,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:35,978 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:52:35,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 71 [2021-06-05 06:52:35,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:36,137 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 06:52:36,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:36,157 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:52:36,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 49 [2021-06-05 06:52:36,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:36,310 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-05 06:52:36,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:36,334 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:52:36,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 06:52:36,336 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:36,485 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 06:52:36,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:36,508 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:52:36,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 57 [2021-06-05 06:52:36,515 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:36,805 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 127 [2021-06-05 06:52:36,806 INFO L628 ElimStorePlain]: treesize reduction 16, result has 96.2 percent of original size [2021-06-05 06:52:36,824 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:52:36,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 06:52:36,827 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:37,104 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-06-05 06:52:37,105 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-06-05 06:52:37,125 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:52:37,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-06-05 06:52:37,127 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:37,256 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 06:52:37,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:37,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:52:37,279 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:743, output treesize:480 [2021-06-05 06:52:37,553 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-05 06:52:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:37,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99289964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:37,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:37,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:52:37,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060746154] [2021-06-05 06:52:37,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:52:37,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:37,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:52:37,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:52:37,730 INFO L87 Difference]: Start difference. First operand 1352 states and 4456 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:38,449 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-05 06:52:38,887 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-06-05 06:52:39,048 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 06:52:39,239 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2021-06-05 06:52:39,573 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2021-06-05 06:52:39,748 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-05 06:52:39,943 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-06-05 06:52:40,086 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 06:52:40,376 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-05 06:52:40,565 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 06:52:40,843 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-05 06:52:41,318 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-06-05 06:52:41,755 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2021-06-05 06:52:42,179 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2021-06-05 06:52:42,679 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-05 06:52:42,949 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 06:52:43,196 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-06-05 06:52:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:43,274 INFO L93 Difference]: Finished difference Result 2040 states and 6414 transitions. [2021-06-05 06:52:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:52:43,274 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:43,277 INFO L225 Difference]: With dead ends: 2040 [2021-06-05 06:52:43,277 INFO L226 Difference]: Without dead ends: 2025 [2021-06-05 06:52:43,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 6010.4ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:52:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-06-05 06:52:43,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1363. [2021-06-05 06:52:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.3069016152716593) internal successors, (4504), 1362 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4504 transitions. [2021-06-05 06:52:43,295 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4504 transitions. Word has length 26 [2021-06-05 06:52:43,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:43,295 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4504 transitions. [2021-06-05 06:52:43,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4504 transitions. [2021-06-05 06:52:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:43,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:43,297 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:43,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-05 06:52:43,498 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:43,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:43,498 INFO L82 PathProgramCache]: Analyzing trace with hash 456895363, now seen corresponding path program 9 times [2021-06-05 06:52:43,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:43,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884148129] [2021-06-05 06:52:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:43,746 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-05 06:52:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:44,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:44,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884148129] [2021-06-05 06:52:44,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884148129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:44,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67349269] [2021-06-05 06:52:44,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:44,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:52:44,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:44,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:52:44,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:44,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:44,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:44,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:44,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:52:44,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:44,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:44,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:44,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:52:44,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:44,972 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-05 06:52:44,972 INFO L628 ElimStorePlain]: treesize reduction 136, result has 57.9 percent of original size [2021-06-05 06:52:44,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:44,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:44,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 06:52:44,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:45,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:45,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:45,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:45,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:52:45,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:45,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:45,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:45,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:45,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:45,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:52:45,126 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:45,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:45,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:45,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:52:45,132 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:45,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:45,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:52:45,187 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:361, output treesize:72 [2021-06-05 06:52:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:45,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67349269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:45,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:45,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:52:45,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380830401] [2021-06-05 06:52:45,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:52:45,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:45,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:52:45,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:52:45,255 INFO L87 Difference]: Start difference. First operand 1363 states and 4504 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,117 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2021-06-05 06:52:46,325 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-06-05 06:52:46,611 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 62 [2021-06-05 06:52:46,990 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-06-05 06:52:47,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:47,147 INFO L93 Difference]: Finished difference Result 1593 states and 5152 transitions. [2021-06-05 06:52:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:52:47,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:47,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:47,150 INFO L225 Difference]: With dead ends: 1593 [2021-06-05 06:52:47,150 INFO L226 Difference]: Without dead ends: 1578 [2021-06-05 06:52:47,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2230.0ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:52:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-06-05 06:52:47,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1372. [2021-06-05 06:52:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.311451495258935) internal successors, (4540), 1371 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4540 transitions. [2021-06-05 06:52:47,165 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4540 transitions. Word has length 26 [2021-06-05 06:52:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:47,165 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4540 transitions. [2021-06-05 06:52:47,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4540 transitions. [2021-06-05 06:52:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:47,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:47,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:47,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:47,368 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:47,368 INFO L82 PathProgramCache]: Analyzing trace with hash 289086271, now seen corresponding path program 10 times [2021-06-05 06:52:47,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:47,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643930548] [2021-06-05 06:52:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:47,686 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2021-06-05 06:52:47,857 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 06:52:48,007 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 06:52:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:48,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:48,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643930548] [2021-06-05 06:52:48,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643930548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:48,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593634908] [2021-06-05 06:52:48,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:48,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:52:48,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:48,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:52:48,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:48,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:52:48,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 06:52:48,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:52:48,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 06:52:48,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:52:48,684 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:52:48,691 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:52:48,698 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:52:48,705 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:52:48,717 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:52:48,724 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:52:48,731 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:52:48,738 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:52:48,744 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:52:48,750 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:52:48,757 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:48,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:48,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:52:48,761 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:48,827 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-05 06:52:48,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:52:48,828 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 06:52:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:48,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593634908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:48,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:48,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:52:48,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313984082] [2021-06-05 06:52:48,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:52:48,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:48,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:52:48,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:52:48,880 INFO L87 Difference]: Start difference. First operand 1372 states and 4540 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,280 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-05 06:52:49,535 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-06-05 06:52:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:49,786 INFO L93 Difference]: Finished difference Result 1674 states and 5467 transitions. [2021-06-05 06:52:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:52:49,787 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:49,789 INFO L225 Difference]: With dead ends: 1674 [2021-06-05 06:52:49,789 INFO L226 Difference]: Without dead ends: 1659 [2021-06-05 06:52:49,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1551.6ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:52:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-06-05 06:52:49,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1372. [2021-06-05 06:52:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.311451495258935) internal successors, (4540), 1371 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4540 transitions. [2021-06-05 06:52:49,805 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4540 transitions. Word has length 26 [2021-06-05 06:52:49,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:49,805 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4540 transitions. [2021-06-05 06:52:49,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4540 transitions. [2021-06-05 06:52:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:49,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:49,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:50,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:50,007 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:50,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1778429757, now seen corresponding path program 11 times [2021-06-05 06:52:50,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:50,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652161663] [2021-06-05 06:52:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:50,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:50,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652161663] [2021-06-05 06:52:50,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652161663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:50,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354945998] [2021-06-05 06:52:50,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:50,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:52:50,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:50,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:52:50,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:51,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:51,062 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:52:51,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 29 [2021-06-05 06:52:51,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:51,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:51,085 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:52:51,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:52:51,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:51,265 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 06:52:51,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:51,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:51,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:51,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-06-05 06:52:51,286 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:51,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:51,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:51,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 06:52:51,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:51,477 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 06:52:51,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:51,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:51,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 06:52:51,500 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:51,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:51,520 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:52:51,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:52:51,523 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:51,700 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 06:52:51,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:51,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:51,720 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:52:51,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:52:51,721 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:51,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:51,739 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:52:51,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 06:52:51,741 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:51,887 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 06:52:51,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:51,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:52:51,911 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:401, output treesize:389 [2021-06-05 06:52:52,092 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-05 06:52:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:52,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354945998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:52,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:52,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:52:52,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456052211] [2021-06-05 06:52:52,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:52:52,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:52,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:52:52,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:52:52,178 INFO L87 Difference]: Start difference. First operand 1372 states and 4540 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:52,604 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2021-06-05 06:52:52,768 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 48 [2021-06-05 06:52:53,101 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-05 06:52:53,695 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-06-05 06:52:54,053 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 96 [2021-06-05 06:52:54,192 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-05 06:52:54,548 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 85 [2021-06-05 06:52:54,739 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-05 06:52:55,069 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2021-06-05 06:52:55,534 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 88 [2021-06-05 06:52:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:55,924 INFO L93 Difference]: Finished difference Result 2311 states and 7396 transitions. [2021-06-05 06:52:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:52:55,924 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:52:55,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:55,927 INFO L225 Difference]: With dead ends: 2311 [2021-06-05 06:52:55,927 INFO L226 Difference]: Without dead ends: 2281 [2021-06-05 06:52:55,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 3936.4ms TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:52:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-06-05 06:52:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1375. [2021-06-05 06:52:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.3151382823871907) internal successors, (4555), 1374 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4555 transitions. [2021-06-05 06:52:55,947 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4555 transitions. Word has length 26 [2021-06-05 06:52:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:55,948 INFO L482 AbstractCegarLoop]: Abstraction has 1375 states and 4555 transitions. [2021-06-05 06:52:55,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4555 transitions. [2021-06-05 06:52:55,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:52:55,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:55,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:56,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable522 [2021-06-05 06:52:56,150 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:56,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:56,150 INFO L82 PathProgramCache]: Analyzing trace with hash -746246473, now seen corresponding path program 12 times [2021-06-05 06:52:56,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:56,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833334728] [2021-06-05 06:52:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:56,375 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2021-06-05 06:52:56,513 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 06:52:56,638 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-06-05 06:52:56,758 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-06-05 06:52:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:56,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:56,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833334728] [2021-06-05 06:52:56,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833334728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:56,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324564257] [2021-06-05 06:52:56,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:56,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:52:56,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:56,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:52:56,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:57,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,208 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:57,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 06:52:57,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:57,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 34 [2021-06-05 06:52:57,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,239 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:52:57,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2021-06-05 06:52:57,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,251 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:57,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-06-05 06:52:57,252 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,263 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:57,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 06:52:57,264 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,275 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:57,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 06:52:57,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,288 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:57,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 06:52:57,288 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,302 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:52:57,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:52:57,303 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,316 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:57,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 06:52:57,316 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,329 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:57,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 06:52:57,329 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,340 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:57,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2021-06-05 06:52:57,340 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,351 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:57,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 06:52:57,352 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:57,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-06-05 06:52:57,367 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:52:57,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-06-05 06:52:57,381 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,395 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:57,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 06:52:57,396 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:52:57,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:52:57,402 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:52:57,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:52:57,403 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:52:57,507 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-06-05 06:52:57,507 INFO L628 ElimStorePlain]: treesize reduction 54, result has 61.4 percent of original size [2021-06-05 06:52:57,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:52:57,508 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:86 [2021-06-05 06:52:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:57,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324564257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:57,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:57,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:52:57,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074740018] [2021-06-05 06:52:57,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:52:57,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:57,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:52:57,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:52:57,645 INFO L87 Difference]: Start difference. First operand 1375 states and 4555 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:58,313 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-06-05 06:52:58,531 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2021-06-05 06:52:58,732 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-06-05 06:52:59,023 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2021-06-05 06:52:59,260 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-05 06:52:59,431 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-06-05 06:52:59,972 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-06-05 06:53:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:00,079 INFO L93 Difference]: Finished difference Result 1790 states and 5831 transitions. [2021-06-05 06:53:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:53:00,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:00,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:00,082 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 06:53:00,082 INFO L226 Difference]: Without dead ends: 1775 [2021-06-05 06:53:00,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2785.5ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:53:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-06-05 06:53:00,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1378. [2021-06-05 06:53:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.316630355846042) internal successors, (4567), 1377 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4567 transitions. [2021-06-05 06:53:00,099 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4567 transitions. Word has length 26 [2021-06-05 06:53:00,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:00,099 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4567 transitions. [2021-06-05 06:53:00,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4567 transitions. [2021-06-05 06:53:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:00,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:00,101 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:00,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:00,302 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:00,302 INFO L82 PathProgramCache]: Analyzing trace with hash 148423883, now seen corresponding path program 13 times [2021-06-05 06:53:00,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:00,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443463749] [2021-06-05 06:53:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:00,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:00,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443463749] [2021-06-05 06:53:00,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443463749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:00,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906315997] [2021-06-05 06:53:00,787 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 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 [2021-06-05 06:53:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:00,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:53:00,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:01,307 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 06:53:01,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:01,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:01,369 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 06:53:01,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-05 06:53:01,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:01,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:01,388 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:53:01,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 57 [2021-06-05 06:53:01,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:01,549 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-06-05 06:53:01,549 INFO L628 ElimStorePlain]: treesize reduction 211, result has 55.7 percent of original size [2021-06-05 06:53:01,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:01,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 06:53:01,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:01,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:01,572 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:53:01,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 50 [2021-06-05 06:53:01,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:01,668 INFO L628 ElimStorePlain]: treesize reduction 19, result has 90.4 percent of original size [2021-06-05 06:53:01,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:01,677 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:53:01,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 30 [2021-06-05 06:53:01,678 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:01,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:01,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:01,733 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:53:01,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 53 [2021-06-05 06:53:01,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:01,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:01,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:53:01,779 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:619, output treesize:64 [2021-06-05 06:53:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:01,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906315997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:01,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:01,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:53:01,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367841760] [2021-06-05 06:53:01,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:01,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:01,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:01,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:01,847 INFO L87 Difference]: Start difference. First operand 1378 states and 4567 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:02,586 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-06-05 06:53:03,047 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-06-05 06:53:03,267 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 06:53:03,563 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 06:53:03,781 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-05 06:53:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:03,950 INFO L93 Difference]: Finished difference Result 2164 states and 6833 transitions. [2021-06-05 06:53:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:53:03,951 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:03,954 INFO L225 Difference]: With dead ends: 2164 [2021-06-05 06:53:03,954 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 06:53:03,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2364.7ms TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:53:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 06:53:03,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1380. [2021-06-05 06:53:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:03,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-06-05 06:53:03,974 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-06-05 06:53:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:03,975 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-06-05 06:53:03,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-06-05 06:53:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:03,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:03,977 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:04,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:04,177 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:04,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:04,177 INFO L82 PathProgramCache]: Analyzing trace with hash -806418041, now seen corresponding path program 39 times [2021-06-05 06:53:04,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:04,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219907128] [2021-06-05 06:53:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:04,533 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-06-05 06:53:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:04,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:04,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219907128] [2021-06-05 06:53:04,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219907128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:04,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000489534] [2021-06-05 06:53:04,793 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 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 [2021-06-05 06:53:04,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:53:04,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:04,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:53:04,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:05,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2021-06-05 06:53:05,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2021-06-05 06:53:05,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2021-06-05 06:53:05,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 24 [2021-06-05 06:53:05,196 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-06-05 06:53:05,211 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 18 [2021-06-05 06:53:05,222 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 06:53:05,233 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 12 [2021-06-05 06:53:05,245 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 18 [2021-06-05 06:53:05,256 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2021-06-05 06:53:05,266 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 28 [2021-06-05 06:53:05,275 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 14 [2021-06-05 06:53:05,286 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 24 [2021-06-05 06:53:05,295 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 24 [2021-06-05 06:53:05,303 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2021-06-05 06:53:05,311 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:05,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:05,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 28 [2021-06-05 06:53:05,319 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:05,363 INFO L628 ElimStorePlain]: treesize reduction 50, result has 49.5 percent of original size [2021-06-05 06:53:05,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:53:05,364 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1097, output treesize:49 [2021-06-05 06:53:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:05,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000489534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:05,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:05,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 06:53:05,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269908074] [2021-06-05 06:53:05,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:53:05,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:05,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:53:05,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:53:05,449 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:05,902 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-06-05 06:53:06,292 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2021-06-05 06:53:06,750 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-06-05 06:53:07,435 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-06-05 06:53:08,515 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-06-05 06:53:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:08,906 INFO L93 Difference]: Finished difference Result 3078 states and 9474 transitions. [2021-06-05 06:53:08,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:53:08,906 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:08,909 INFO L225 Difference]: With dead ends: 3078 [2021-06-05 06:53:08,910 INFO L226 Difference]: Without dead ends: 2991 [2021-06-05 06:53:08,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 3472.8ms TimeCoverageRelationStatistics Valid=542, Invalid=2764, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:53:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-05 06:53:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 1413. [2021-06-05 06:53:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3208215297450425) internal successors, (4689), 1412 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4689 transitions. [2021-06-05 06:53:08,931 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4689 transitions. Word has length 26 [2021-06-05 06:53:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:08,931 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4689 transitions. [2021-06-05 06:53:08,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4689 transitions. [2021-06-05 06:53:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:08,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:08,933 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:09,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:09,137 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:09,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:09,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1738294259, now seen corresponding path program 14 times [2021-06-05 06:53:09,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:09,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395207108] [2021-06-05 06:53:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:09,526 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-05 06:53:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:09,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:09,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395207108] [2021-06-05 06:53:09,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395207108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:09,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086927008] [2021-06-05 06:53:09,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:53:09,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:09,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:09,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:53:09,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:10,140 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 06:53:10,516 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2021-06-05 06:53:10,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:10,794 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 06:53:10,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 89 [2021-06-05 06:53:10,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:10,817 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-06-05 06:53:10,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 1 [2021-06-05 06:53:10,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:11,360 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 197 [2021-06-05 06:53:11,361 INFO L628 ElimStorePlain]: treesize reduction 788, result has 46.3 percent of original size [2021-06-05 06:53:11,387 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:53:11,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 52 [2021-06-05 06:53:11,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:11,547 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2021-06-05 06:53:11,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:11,580 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 06:53:11,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 69 [2021-06-05 06:53:11,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:11,739 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-05 06:53:11,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:11,764 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:53:11,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 62 [2021-06-05 06:53:11,766 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:11,933 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 06:53:11,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:11,954 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:53:11,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 55 [2021-06-05 06:53:11,956 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:12,119 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 06:53:12,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:12,144 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:53:12,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 60 [2021-06-05 06:53:12,148 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:12,303 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 06:53:12,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:12,332 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 06:53:12,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 72 [2021-06-05 06:53:12,334 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:12,481 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 06:53:12,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:12,507 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 06:53:12,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 77 [2021-06-05 06:53:12,509 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:12,665 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 06:53:12,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:12,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:53:12,706 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1661, output treesize:498 [2021-06-05 06:53:12,923 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-05 06:53:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:13,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086927008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:13,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:13,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 06:53:13,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682573557] [2021-06-05 06:53:13,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:53:13,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:13,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:53:13,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:13,014 INFO L87 Difference]: Start difference. First operand 1413 states and 4689 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:13,598 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 06:53:13,777 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 06:53:13,936 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-05 06:53:14,229 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-05 06:53:14,469 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-06-05 06:53:14,634 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 73 [2021-06-05 06:53:14,854 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-06-05 06:53:15,193 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 76 [2021-06-05 06:53:15,842 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-06-05 06:53:17,576 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 277 DAG size of output: 259 [2021-06-05 06:53:18,284 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 113 [2021-06-05 06:53:18,856 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-06-05 06:53:19,493 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 112 [2021-06-05 06:53:21,408 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 274 DAG size of output: 258 [2021-06-05 06:53:23,682 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 303 DAG size of output: 279 [2021-06-05 06:53:24,279 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-06-05 06:53:24,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:24,755 INFO L93 Difference]: Finished difference Result 2106 states and 6748 transitions. [2021-06-05 06:53:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:53:24,755 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:24,758 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 06:53:24,758 INFO L226 Difference]: Without dead ends: 2091 [2021-06-05 06:53:24,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 11314.0ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:53:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-05 06:53:24,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1409. [2021-06-05 06:53:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.319602272727273) internal successors, (4674), 1408 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4674 transitions. [2021-06-05 06:53:24,778 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4674 transitions. Word has length 26 [2021-06-05 06:53:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:24,778 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4674 transitions. [2021-06-05 06:53:24,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4674 transitions. [2021-06-05 06:53:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:24,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:24,780 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:24,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-05 06:53:24,980 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:24,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:24,980 INFO L82 PathProgramCache]: Analyzing trace with hash 120761479, now seen corresponding path program 15 times [2021-06-05 06:53:24,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:24,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890694174] [2021-06-05 06:53:24,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:25,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:25,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890694174] [2021-06-05 06:53:25,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890694174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:25,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011260649] [2021-06-05 06:53:25,409 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 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 [2021-06-05 06:53:25,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:53:25,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:25,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:53:25,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:25,789 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 06:53:25,858 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_80, v_prenex_87, v_prenex_85, v_prenex_78], 6=[v_prenex_83, A, v_prenex_76, v_prenex_89]} [2021-06-05 06:53:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:25,877 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:53:25,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:53:25,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:26,225 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 153 [2021-06-05 06:53:26,226 INFO L628 ElimStorePlain]: treesize reduction 413, result has 53.5 percent of original size [2021-06-05 06:53:26,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:26,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:26,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:53:26,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:26,382 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-05 06:53:26,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:26,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:26,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:26,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:53:26,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:26,532 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 06:53:26,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:26,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:26,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:26,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:53:26,549 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:26,675 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 06:53:26,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:26,691 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:53:26,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-06-05 06:53:26,693 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:26,816 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 06:53:26,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:26,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:26,837 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-05 06:53:26,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-05 06:53:26,838 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:26,952 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 06:53:26,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:26,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:26,973 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 06:53:26,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 63 [2021-06-05 06:53:26,974 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:27,081 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 06:53:27,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:27,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:27,095 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 06:53:27,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 31 [2021-06-05 06:53:27,096 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:27,198 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 06:53:27,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:27,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:53:27,206 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:903, output treesize:216 [2021-06-05 06:53:27,359 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-06-05 06:53:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:27,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011260649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:27,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:27,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:53:27,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959501477] [2021-06-05 06:53:27,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:27,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:27,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:27,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:27,454 INFO L87 Difference]: Start difference. First operand 1409 states and 4674 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:28,099 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-05 06:53:28,238 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-06-05 06:53:29,063 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 82 [2021-06-05 06:53:29,386 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 06:53:29,565 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-06-05 06:53:30,269 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 79 [2021-06-05 06:53:30,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:30,694 INFO L93 Difference]: Finished difference Result 2320 states and 7312 transitions. [2021-06-05 06:53:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:53:30,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:30,698 INFO L225 Difference]: With dead ends: 2320 [2021-06-05 06:53:30,698 INFO L226 Difference]: Without dead ends: 2305 [2021-06-05 06:53:30,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3342.4ms TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:53:30,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-06-05 06:53:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1409. [2021-06-05 06:53:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.319602272727273) internal successors, (4674), 1408 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:30,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4674 transitions. [2021-06-05 06:53:30,717 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4674 transitions. Word has length 26 [2021-06-05 06:53:30,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:30,717 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4674 transitions. [2021-06-05 06:53:30,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:30,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4674 transitions. [2021-06-05 06:53:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:30,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:30,719 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:30,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable656 [2021-06-05 06:53:30,919 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:30,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:30,920 INFO L82 PathProgramCache]: Analyzing trace with hash 395894327, now seen corresponding path program 40 times [2021-06-05 06:53:30,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:30,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879105329] [2021-06-05 06:53:30,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:31,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:31,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879105329] [2021-06-05 06:53:31,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879105329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:31,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514158234] [2021-06-05 06:53:31,564 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 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 [2021-06-05 06:53:31,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:31,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:31,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:53:31,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:32,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 31 [2021-06-05 06:53:32,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-06-05 06:53:32,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 06:53:32,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-06-05 06:53:32,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-06-05 06:53:32,225 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 06:53:32,246 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2021-06-05 06:53:32,257 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-05 06:53:32,268 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-06-05 06:53:32,278 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-06-05 06:53:32,288 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-06-05 06:53:32,298 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-06-05 06:53:32,308 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:53:32,328 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 06:53:32,337 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 06:53:32,346 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:32,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:32,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 06:53:32,352 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:32,429 INFO L628 ElimStorePlain]: treesize reduction 346, result has 12.0 percent of original size [2021-06-05 06:53:32,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:53:32,430 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:41 [2021-06-05 06:53:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:32,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514158234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:32,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:32,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 06:53:32,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488090489] [2021-06-05 06:53:32,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:53:32,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:32,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:53:32,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:32,472 INFO L87 Difference]: Start difference. First operand 1409 states and 4674 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:33,079 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 06:53:33,490 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-06-05 06:53:33,686 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-06-05 06:53:34,234 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-06-05 06:53:34,402 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-06-05 06:53:34,792 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2021-06-05 06:53:35,124 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-06-05 06:53:35,590 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-05 06:53:35,752 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-06-05 06:53:36,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:36,105 INFO L93 Difference]: Finished difference Result 2743 states and 8648 transitions. [2021-06-05 06:53:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:53:36,110 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:36,114 INFO L225 Difference]: With dead ends: 2743 [2021-06-05 06:53:36,114 INFO L226 Difference]: Without dead ends: 2698 [2021-06-05 06:53:36,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 3714.2ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:53:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2021-06-05 06:53:36,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 1412. [2021-06-05 06:53:36,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.3217576187101345) internal successors, (4687), 1411 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4687 transitions. [2021-06-05 06:53:36,135 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4687 transitions. Word has length 26 [2021-06-05 06:53:36,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:36,135 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4687 transitions. [2021-06-05 06:53:36,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:36,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4687 transitions. [2021-06-05 06:53:36,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:36,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:36,137 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:36,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:36,339 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:36,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:36,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2065424317, now seen corresponding path program 41 times [2021-06-05 06:53:36,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:36,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764619579] [2021-06-05 06:53:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:36,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:36,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764619579] [2021-06-05 06:53:36,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764619579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:36,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967890797] [2021-06-05 06:53:36,801 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 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 [2021-06-05 06:53:36,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:53:36,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:36,829 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:53:36,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:37,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,452 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:53:37,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 36 [2021-06-05 06:53:37,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,483 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:53:37,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 44 [2021-06-05 06:53:37,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,518 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 06:53:37,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-06-05 06:53:37,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,550 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 06:53:37,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 37 [2021-06-05 06:53:37,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,579 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:53:37,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 43 [2021-06-05 06:53:37,583 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,610 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 06:53:37,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 38 [2021-06-05 06:53:37,612 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,629 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:37,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:53:37,629 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,645 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:37,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 06:53:37,647 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,666 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:37,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:53:37,667 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,701 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 06:53:37,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2021-06-05 06:53:37,704 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,720 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:37,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 06:53:37,720 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,735 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:37,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:53:37,736 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,752 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:37,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 06:53:37,752 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,776 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-06-05 06:53:37,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 35 [2021-06-05 06:53:37,778 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,793 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:37,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 06:53:37,794 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:37,803 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:53:37,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 1 [2021-06-05 06:53:37,804 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:37,924 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-06-05 06:53:37,925 INFO L628 ElimStorePlain]: treesize reduction 202, result has 36.7 percent of original size [2021-06-05 06:53:37,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:53:37,927 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1065, output treesize:103 [2021-06-05 06:53:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:38,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967890797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:38,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:38,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 06:53:38,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910212459] [2021-06-05 06:53:38,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:53:38,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:38,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:53:38,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:53:38,072 INFO L87 Difference]: Start difference. First operand 1412 states and 4687 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:38,474 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 06:53:38,963 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-05 06:53:39,616 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2021-06-05 06:53:40,045 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 06:53:40,276 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-05 06:53:40,526 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 06:53:40,769 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-06-05 06:53:41,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:41,032 INFO L93 Difference]: Finished difference Result 2483 states and 7959 transitions. [2021-06-05 06:53:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:53:41,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:41,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:41,036 INFO L225 Difference]: With dead ends: 2483 [2021-06-05 06:53:41,036 INFO L226 Difference]: Without dead ends: 2453 [2021-06-05 06:53:41,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 2984.2ms TimeCoverageRelationStatistics Valid=451, Invalid=1999, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:53:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-06-05 06:53:41,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1413. [2021-06-05 06:53:41,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3236543909348444) internal successors, (4693), 1412 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:41,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4693 transitions. [2021-06-05 06:53:41,066 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4693 transitions. Word has length 26 [2021-06-05 06:53:41,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:41,066 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4693 transitions. [2021-06-05 06:53:41,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:41,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4693 transitions. [2021-06-05 06:53:41,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:41,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:41,068 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:41,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable771 [2021-06-05 06:53:41,281 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:41,281 INFO L82 PathProgramCache]: Analyzing trace with hash 386531115, now seen corresponding path program 16 times [2021-06-05 06:53:41,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:41,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806307383] [2021-06-05 06:53:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:41,498 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 06:53:41,634 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-06-05 06:53:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:41,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:41,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806307383] [2021-06-05 06:53:41,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806307383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:41,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496491524] [2021-06-05 06:53:41,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:41,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:41,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:41,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:53:41,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:42,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:53:42,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 06:53:42,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:42,316 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:42,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:42,329 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 06:53:42,336 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:42,343 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:42,350 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:42,356 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:42,363 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:42,369 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:53:42,376 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:53:42,382 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:42,389 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:42,395 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:42,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:42,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:53:42,399 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:42,458 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-05 06:53:42,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:53:42,460 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 06:53:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:42,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496491524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:42,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:42,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:53:42,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846044051] [2021-06-05 06:53:42,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:42,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:42,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:42,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:42,504 INFO L87 Difference]: Start difference. First operand 1413 states and 4693 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:43,066 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-05 06:53:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:43,414 INFO L93 Difference]: Finished difference Result 1799 states and 5861 transitions. [2021-06-05 06:53:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:53:43,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:43,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:43,417 INFO L225 Difference]: With dead ends: 1799 [2021-06-05 06:53:43,417 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 06:53:43,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1354.0ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:53:43,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 06:53:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1422. [2021-06-05 06:53:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3237156931738214) internal successors, (4723), 1421 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4723 transitions. [2021-06-05 06:53:43,435 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4723 transitions. Word has length 26 [2021-06-05 06:53:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:43,435 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4723 transitions. [2021-06-05 06:53:43,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4723 transitions. [2021-06-05 06:53:43,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:43,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:43,437 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:43,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable889,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:43,638 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:43,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:43,638 INFO L82 PathProgramCache]: Analyzing trace with hash 715690687, now seen corresponding path program 17 times [2021-06-05 06:53:43,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:43,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651761816] [2021-06-05 06:53:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:44,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:44,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651761816] [2021-06-05 06:53:44,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651761816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:44,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584165769] [2021-06-05 06:53:44,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:44,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:53:44,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:44,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:53:44,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:44,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:44,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:44,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:44,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:53:44,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:53:44,642 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 06:53:44,647 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:44,653 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:44,659 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:53:44,665 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:44,672 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:44,678 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:44,685 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 06:53:44,690 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:44,695 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:53:44,701 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:44,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:53:44,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:44,704 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:44,768 INFO L628 ElimStorePlain]: treesize reduction 71, result has 47.4 percent of original size [2021-06-05 06:53:44,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:53:44,769 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 06:53:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:44,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584165769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:44,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:44,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:53:44,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103412890] [2021-06-05 06:53:44,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:53:44,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:44,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:53:44,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:44,815 INFO L87 Difference]: Start difference. First operand 1422 states and 4723 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:45,219 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2021-06-05 06:53:45,368 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2021-06-05 06:53:45,655 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-05 06:53:45,814 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-05 06:53:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:46,287 INFO L93 Difference]: Finished difference Result 1615 states and 5256 transitions. [2021-06-05 06:53:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:53:46,287 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:46,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:46,290 INFO L225 Difference]: With dead ends: 1615 [2021-06-05 06:53:46,290 INFO L226 Difference]: Without dead ends: 1600 [2021-06-05 06:53:46,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1843.3ms TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:53:46,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-05 06:53:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1431. [2021-06-05 06:53:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 3.327972027972028) internal successors, (4759), 1430 states have internal predecessors, (4759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:46,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4759 transitions. [2021-06-05 06:53:46,308 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4759 transitions. Word has length 26 [2021-06-05 06:53:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:46,308 INFO L482 AbstractCegarLoop]: Abstraction has 1431 states and 4759 transitions. [2021-06-05 06:53:46,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4759 transitions. [2021-06-05 06:53:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:46,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:46,310 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:46,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable923 [2021-06-05 06:53:46,512 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:46,512 INFO L82 PathProgramCache]: Analyzing trace with hash 547881595, now seen corresponding path program 18 times [2021-06-05 06:53:46,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:46,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624405794] [2021-06-05 06:53:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:46,780 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2021-06-05 06:53:46,963 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 57 [2021-06-05 06:53:47,174 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2021-06-05 06:53:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:47,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:47,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624405794] [2021-06-05 06:53:47,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624405794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:47,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133682909] [2021-06-05 06:53:47,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:47,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:53:47,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:47,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:53:47,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:47,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:47,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:53:47,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,767 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:47,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:47,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:47,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:53:47,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,790 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:47,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:53:47,791 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,802 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:47,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:53:47,803 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,811 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:47,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:47,812 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,821 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:47,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:47,821 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,830 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:47,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:47,831 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,842 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:53:47,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 06:53:47,842 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,851 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:47,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:47,852 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,860 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:47,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:47,861 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,869 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:47,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:53:47,870 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,879 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:47,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:53:47,880 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,889 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:47,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:53:47,890 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:47,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:53:47,902 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:47,908 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:53:47,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:53:47,909 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:47,992 INFO L628 ElimStorePlain]: treesize reduction 55, result has 61.8 percent of original size [2021-06-05 06:53:47,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:53:47,996 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:88 [2021-06-05 06:53:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:48,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133682909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:48,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:48,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:53:48,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330253326] [2021-06-05 06:53:48,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:53:48,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:48,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:53:48,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:53:48,127 INFO L87 Difference]: Start difference. First operand 1431 states and 4759 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:48,783 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2021-06-05 06:53:48,908 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-05 06:53:49,224 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-05 06:53:49,428 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-05 06:53:49,760 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 06:53:49,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:49,824 INFO L93 Difference]: Finished difference Result 1909 states and 6216 transitions. [2021-06-05 06:53:49,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:53:49,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:49,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:49,827 INFO L225 Difference]: With dead ends: 1909 [2021-06-05 06:53:49,827 INFO L226 Difference]: Without dead ends: 1894 [2021-06-05 06:53:49,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2243.8ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:53:49,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-05 06:53:49,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1422. [2021-06-05 06:53:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3237156931738214) internal successors, (4723), 1421 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4723 transitions. [2021-06-05 06:53:49,844 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4723 transitions. Word has length 26 [2021-06-05 06:53:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:49,844 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4723 transitions. [2021-06-05 06:53:49,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4723 transitions. [2021-06-05 06:53:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:49,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:49,846 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:50,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:50,046 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:50,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:50,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2104983929, now seen corresponding path program 19 times [2021-06-05 06:53:50,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:50,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189503901] [2021-06-05 06:53:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:50,254 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-06-05 06:53:50,377 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-06-05 06:53:50,503 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-05 06:53:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:50,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:50,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189503901] [2021-06-05 06:53:50,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189503901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:50,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672058130] [2021-06-05 06:53:50,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:53:50,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:51,071 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 06:53:51,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:51,152 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:53:51,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:53:51,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:51,278 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 06:53:51,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:51,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:51,291 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:53:51,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 06:53:51,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:51,414 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 06:53:51,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:51,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:51,427 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:53:51,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:53:51,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:51,547 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 06:53:51,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:51,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:51,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:51,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:53:51,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:51,672 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 06:53:51,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:51,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:51,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:51,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:53:51,685 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:51,797 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 06:53:51,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:51,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:51,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:51,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:53:51,810 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:51,918 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 06:53:51,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:51,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:51,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:51,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:53:51,931 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,037 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 06:53:52,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:52,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:53:52,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:52,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:53:52,050 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:52,151 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 06:53:52,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:52,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:53:52,160 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-05 06:53:52,296 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-05 06:53:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:52,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672058130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:52,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:52,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:53:52,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584887552] [2021-06-05 06:53:52,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:53:52,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:52,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:53:52,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:53:52,381 INFO L87 Difference]: Start difference. First operand 1422 states and 4723 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:53,118 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 06:53:53,612 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 06:53:54,105 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-06-05 06:53:54,520 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-06-05 06:53:54,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:54,754 INFO L93 Difference]: Finished difference Result 2073 states and 6674 transitions. [2021-06-05 06:53:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:53:54,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:54,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:54,757 INFO L225 Difference]: With dead ends: 2073 [2021-06-05 06:53:54,757 INFO L226 Difference]: Without dead ends: 2058 [2021-06-05 06:53:54,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 2963.5ms TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:53:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-05 06:53:54,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1419. [2021-06-05 06:53:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3222849083215795) internal successors, (4711), 1418 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4711 transitions. [2021-06-05 06:53:54,776 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4711 transitions. Word has length 26 [2021-06-05 06:53:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:54,777 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4711 transitions. [2021-06-05 06:53:54,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:54,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4711 transitions. [2021-06-05 06:53:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:54,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:54,779 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:54,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-06-05 06:53:54,993 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:54,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:54,993 INFO L82 PathProgramCache]: Analyzing trace with hash 178197831, now seen corresponding path program 20 times [2021-06-05 06:53:54,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:54,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971739278] [2021-06-05 06:53:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:55,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:55,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971739278] [2021-06-05 06:53:55,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971739278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:55,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17181487] [2021-06-05 06:53:55,346 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 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 [2021-06-05 06:53:55,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:55,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:55,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:53:55,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:55,736 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:55,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:55,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,760 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:55,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 06:53:55,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,778 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:53:55,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 23 [2021-06-05 06:53:55,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,788 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:55,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:55,789 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,808 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:55,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 06:53:55,810 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,819 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:55,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:55,820 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,829 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:55,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:55,830 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,843 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:53:55,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 16 [2021-06-05 06:53:55,844 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:55,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 06:53:55,861 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,871 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:55,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:53:55,872 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,881 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:55,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:53:55,882 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,891 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:55,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:55,892 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,909 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:53:55,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 06:53:55,910 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,922 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:55,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:55,923 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,933 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:55,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:53:55,934 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:55,941 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:55,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:53:55,941 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:56,055 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-05 06:53:56,055 INFO L628 ElimStorePlain]: treesize reduction 63, result has 68.8 percent of original size [2021-06-05 06:53:56,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:53:56,062 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:157 [2021-06-05 06:53:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:56,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17181487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:56,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:56,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:53:56,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762714418] [2021-06-05 06:53:56,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:53:56,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:56,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:53:56,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:53:56,224 INFO L87 Difference]: Start difference. First operand 1419 states and 4711 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:58,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:58,323 INFO L93 Difference]: Finished difference Result 1996 states and 6371 transitions. [2021-06-05 06:53:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:53:58,323 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:53:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:58,326 INFO L225 Difference]: With dead ends: 1996 [2021-06-05 06:53:58,326 INFO L226 Difference]: Without dead ends: 1956 [2021-06-05 06:53:58,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 2201.4ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:53:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-06-05 06:53:58,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1468. [2021-06-05 06:53:58,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.319700068166326) internal successors, (4870), 1467 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4870 transitions. [2021-06-05 06:53:58,344 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4870 transitions. Word has length 26 [2021-06-05 06:53:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:58,344 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4870 transitions. [2021-06-05 06:53:58,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4870 transitions. [2021-06-05 06:53:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:53:58,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:58,346 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:58,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1004,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:58,547 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:58,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:58,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2057127289, now seen corresponding path program 21 times [2021-06-05 06:53:58,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:58,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877589522] [2021-06-05 06:53:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:58,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:58,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877589522] [2021-06-05 06:53:58,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877589522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:58,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961558666] [2021-06-05 06:53:58,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:58,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:53:58,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:58,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:53:58,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:59,241 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:59,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:53:59,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,252 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:59,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:53:59,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,270 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:53:59,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:53:59,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,291 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:59,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:53:59,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,303 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:59,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:53:59,303 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,313 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:59,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:53:59,314 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,334 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:59,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 06:53:59,335 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,345 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:59,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:59,346 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,366 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:59,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 06:53:59,368 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,378 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:59,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:53:59,379 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,389 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:59,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:53:59,390 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,410 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:53:59,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 06:53:59,412 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,422 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:59,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:53:59,423 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:53:59,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 06:53:59,440 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,450 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:59,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:53:59,451 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,458 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:53:59,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:53:59,459 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:53:59,667 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-06-05 06:53:59,667 INFO L628 ElimStorePlain]: treesize reduction 156, result has 50.5 percent of original size [2021-06-05 06:53:59,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:53:59,675 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:873, output treesize:221 [2021-06-05 06:53:59,824 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 06:54:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:00,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961558666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:00,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:00,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 06:54:00,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777948739] [2021-06-05 06:54:00,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:54:00,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:00,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:54:00,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:54:00,009 INFO L87 Difference]: Start difference. First operand 1468 states and 4870 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:00,628 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 06:54:00,996 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 06:54:01,200 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 06:54:01,688 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-06-05 06:54:01,967 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-06-05 06:54:02,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:02,032 INFO L93 Difference]: Finished difference Result 2188 states and 6976 transitions. [2021-06-05 06:54:02,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:54:02,033 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:02,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:02,036 INFO L225 Difference]: With dead ends: 2188 [2021-06-05 06:54:02,036 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 06:54:02,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2248.8ms TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:54:02,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 06:54:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1486. [2021-06-05 06:54:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.3252525252525253) internal successors, (4938), 1485 states have internal predecessors, (4938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4938 transitions. [2021-06-05 06:54:02,056 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4938 transitions. Word has length 26 [2021-06-05 06:54:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:02,056 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 4938 transitions. [2021-06-05 06:54:02,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4938 transitions. [2021-06-05 06:54:02,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:02,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:02,058 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:02,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1044 [2021-06-05 06:54:02,259 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:02,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:02,259 INFO L82 PathProgramCache]: Analyzing trace with hash 309162187, now seen corresponding path program 22 times [2021-06-05 06:54:02,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:02,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910989939] [2021-06-05 06:54:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:02,455 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-05 06:54:02,593 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-05 06:54:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:02,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:02,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910989939] [2021-06-05 06:54:02,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910989939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:02,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626654056] [2021-06-05 06:54:02,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:02,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:54:02,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:02,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:54:02,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:03,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:03,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:03,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:03,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 06:54:03,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:03,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:03,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:03,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:54:03,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:03,328 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 06:54:03,328 INFO L628 ElimStorePlain]: treesize reduction 106, result has 62.4 percent of original size [2021-06-05 06:54:03,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:03,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:03,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:54:03,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:03,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:03,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:03,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:03,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:54:03,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:03,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:03,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:03,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:03,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:03,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 06:54:03,481 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:03,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:03,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:03,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:54:03,486 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:03,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:03,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:54:03,532 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:337, output treesize:72 [2021-06-05 06:54:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:03,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626654056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:03,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:03,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:54:03,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661721458] [2021-06-05 06:54:03,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:54:03,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:03,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:54:03,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:54:03,601 INFO L87 Difference]: Start difference. First operand 1486 states and 4938 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:03,927 INFO L93 Difference]: Finished difference Result 1609 states and 5273 transitions. [2021-06-05 06:54:03,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:54:03,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:03,930 INFO L225 Difference]: With dead ends: 1609 [2021-06-05 06:54:03,930 INFO L226 Difference]: Without dead ends: 1594 [2021-06-05 06:54:03,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 829.9ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:54:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-06-05 06:54:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1492. [2021-06-05 06:54:03,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 3.3272971160295106) internal successors, (4961), 1491 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:03,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 4961 transitions. [2021-06-05 06:54:03,948 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 4961 transitions. Word has length 26 [2021-06-05 06:54:03,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:03,948 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 4961 transitions. [2021-06-05 06:54:03,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 4961 transitions. [2021-06-05 06:54:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:03,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:03,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:04,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1089,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:04,151 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1879987787, now seen corresponding path program 23 times [2021-06-05 06:54:04,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:04,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130203108] [2021-06-05 06:54:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:04,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:04,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130203108] [2021-06-05 06:54:04,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130203108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:04,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572833243] [2021-06-05 06:54:04,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:04,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:54:04,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:04,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:54:04,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:04,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:04,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:04,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:54:04,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:04,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:04,910 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:54:04,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:54:04,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:05,034 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 06:54:05,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:05,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:05,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:05,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:54:05,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:05,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:05,057 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:54:05,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:54:05,057 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:05,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:05,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:05,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:05,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:54:05,173 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:05,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:05,186 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:54:05,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:54:05,187 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:05,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:05,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:05,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:05,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:54:05,288 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:05,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:05,296 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:54:05,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 06:54:05,297 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:05,456 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-06-05 06:54:05,456 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.4 percent of original size [2021-06-05 06:54:05,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 06:54:05,462 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:377, output treesize:160 [2021-06-05 06:54:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:05,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572833243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:05,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:05,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:54:05,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659161028] [2021-06-05 06:54:05,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:54:05,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:05,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:54:05,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:54:05,634 INFO L87 Difference]: Start difference. First operand 1492 states and 4961 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:06,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:06,560 INFO L93 Difference]: Finished difference Result 1996 states and 6490 transitions. [2021-06-05 06:54:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:54:06,560 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:06,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:06,563 INFO L225 Difference]: With dead ends: 1996 [2021-06-05 06:54:06,563 INFO L226 Difference]: Without dead ends: 1971 [2021-06-05 06:54:06,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1231.4ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:54:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-06-05 06:54:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1499. [2021-06-05 06:54:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.3317757009345796) internal successors, (4991), 1498 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 4991 transitions. [2021-06-05 06:54:06,586 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 4991 transitions. Word has length 26 [2021-06-05 06:54:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:06,586 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 4991 transitions. [2021-06-05 06:54:06,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 4991 transitions. [2021-06-05 06:54:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:06,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:06,588 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:06,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1100 [2021-06-05 06:54:06,788 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:06,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:06,789 INFO L82 PathProgramCache]: Analyzing trace with hash -224872725, now seen corresponding path program 24 times [2021-06-05 06:54:06,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:06,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029769755] [2021-06-05 06:54:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:07,132 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2021-06-05 06:54:07,372 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2021-06-05 06:54:07,585 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-06-05 06:54:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:07,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:07,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029769755] [2021-06-05 06:54:07,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029769755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:07,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301597476] [2021-06-05 06:54:07,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:07,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:54:07,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:07,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:54:07,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:08,224 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 06:54:08,496 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 96 [2021-06-05 06:54:08,601 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_125], 6=[v_prenex_123, v_prenex_124, v_prenex_126]} [2021-06-05 06:54:08,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:08,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:08,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:54:08,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:08,770 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-06-05 06:54:08,771 INFO L628 ElimStorePlain]: treesize reduction 263, result has 47.9 percent of original size [2021-06-05 06:54:08,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:08,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:08,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:54:08,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:08,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:08,846 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 06:54:08,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 35 [2021-06-05 06:54:08,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:08,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:08,919 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:54:08,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 06:54:08,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:08,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:08,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:08,986 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:54:08,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 48 [2021-06-05 06:54:08,988 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:09,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:09,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:54:09,034 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:521, output treesize:74 [2021-06-05 06:54:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:09,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301597476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:09,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:09,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:54:09,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100331339] [2021-06-05 06:54:09,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:54:09,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:54:09,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:54:09,111 INFO L87 Difference]: Start difference. First operand 1499 states and 4991 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:09,302 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 32 [2021-06-05 06:54:09,922 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-06-05 06:54:10,318 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 06:54:10,719 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 123 [2021-06-05 06:54:10,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:10,866 INFO L93 Difference]: Finished difference Result 1881 states and 6161 transitions. [2021-06-05 06:54:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:54:10,867 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:10,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:10,869 INFO L225 Difference]: With dead ends: 1881 [2021-06-05 06:54:10,869 INFO L226 Difference]: Without dead ends: 1866 [2021-06-05 06:54:10,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2769.7ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:54:10,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-05 06:54:10,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1508. [2021-06-05 06:54:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 3.33178500331785) internal successors, (5021), 1507 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 5021 transitions. [2021-06-05 06:54:10,887 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 5021 transitions. Word has length 26 [2021-06-05 06:54:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:10,887 INFO L482 AbstractCegarLoop]: Abstraction has 1508 states and 5021 transitions. [2021-06-05 06:54:10,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 5021 transitions. [2021-06-05 06:54:10,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:10,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:10,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:11,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1127 [2021-06-05 06:54:11,089 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:11,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1842405505, now seen corresponding path program 25 times [2021-06-05 06:54:11,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:11,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332927452] [2021-06-05 06:54:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:11,505 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-06-05 06:54:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:11,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:11,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332927452] [2021-06-05 06:54:11,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332927452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:11,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759446318] [2021-06-05 06:54:11,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:11,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:54:11,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:12,087 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 06:54:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:12,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:12,237 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-06-05 06:54:12,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 102 treesize of output 68 [2021-06-05 06:54:12,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:12,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:12,253 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 06:54:12,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 1 [2021-06-05 06:54:12,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:12,663 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 173 [2021-06-05 06:54:12,664 INFO L628 ElimStorePlain]: treesize reduction 703, result has 43.6 percent of original size [2021-06-05 06:54:12,678 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:54:12,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 06:54:12,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:12,816 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 06:54:12,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:12,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:12,833 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:54:12,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 35 [2021-06-05 06:54:12,836 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,097 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 150 [2021-06-05 06:54:13,098 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.4 percent of original size [2021-06-05 06:54:13,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:13,115 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:54:13,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 38 [2021-06-05 06:54:13,116 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,244 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-05 06:54:13,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:13,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:13,267 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 06:54:13,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 63 [2021-06-05 06:54:13,269 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,394 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 06:54:13,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:13,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:13,416 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-05 06:54:13,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-05 06:54:13,417 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,544 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 06:54:13,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:13,557 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:54:13,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-06-05 06:54:13,558 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,666 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 06:54:13,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:13,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:13,686 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 06:54:13,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 55 [2021-06-05 06:54:13,688 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:13,790 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 06:54:13,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:13,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:54:13,798 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1437, output treesize:216 [2021-06-05 06:54:13,935 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-05 06:54:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:14,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759446318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:14,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:14,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:54:14,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955823366] [2021-06-05 06:54:14,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:54:14,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:14,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:54:14,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:54:14,013 INFO L87 Difference]: Start difference. First operand 1508 states and 5021 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:14,658 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2021-06-05 06:54:15,191 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 06:54:15,782 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2021-06-05 06:54:15,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:15,929 INFO L93 Difference]: Finished difference Result 2002 states and 6531 transitions. [2021-06-05 06:54:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:54:15,929 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:15,932 INFO L225 Difference]: With dead ends: 2002 [2021-06-05 06:54:15,932 INFO L226 Difference]: Without dead ends: 1983 [2021-06-05 06:54:15,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2558.4ms TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:54:15,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-06-05 06:54:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1511. [2021-06-05 06:54:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 3.3350993377483444) internal successors, (5036), 1510 states have internal predecessors, (5036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 5036 transitions. [2021-06-05 06:54:15,950 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 5036 transitions. Word has length 26 [2021-06-05 06:54:15,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:15,950 INFO L482 AbstractCegarLoop]: Abstraction has 1511 states and 5036 transitions. [2021-06-05 06:54:15,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 5036 transitions. [2021-06-05 06:54:15,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:15,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:15,952 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:16,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1138 [2021-06-05 06:54:16,153 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:16,153 INFO L82 PathProgramCache]: Analyzing trace with hash 762618887, now seen corresponding path program 26 times [2021-06-05 06:54:16,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:16,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676339739] [2021-06-05 06:54:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:16,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:16,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676339739] [2021-06-05 06:54:16,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676339739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:16,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112418628] [2021-06-05 06:54:16,568 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 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 [2021-06-05 06:54:16,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:54:16,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:16,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:54:16,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:16,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,820 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:54:16,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:54:16,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:16,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:54:16,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,842 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:54:16,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:54:16,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,854 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:54:16,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:54:16,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:16,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:54:16,868 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:16,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:54:16,881 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:16,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:54:16,894 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,912 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:54:16,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:54:16,913 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,922 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:54:16,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:54:16,923 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,932 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:54:16,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:54:16,933 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,948 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:54:16,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:54:16,948 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,957 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:54:16,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:54:16,958 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,968 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:54:16,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:54:16,968 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,976 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:54:16,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:54:16,977 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,985 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:54:16,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:54:16,986 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:16,991 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:54:16,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:54:16,992 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:17,101 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-06-05 06:54:17,101 INFO L628 ElimStorePlain]: treesize reduction 77, result has 51.0 percent of original size [2021-06-05 06:54:17,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:54:17,102 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 06:54:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:17,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112418628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:17,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:17,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:54:17,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504802522] [2021-06-05 06:54:17,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:54:17,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:17,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:54:17,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:54:17,242 INFO L87 Difference]: Start difference. First operand 1511 states and 5036 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:17,589 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2021-06-05 06:54:18,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:18,597 INFO L93 Difference]: Finished difference Result 2063 states and 6723 transitions. [2021-06-05 06:54:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:54:18,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:18,600 INFO L225 Difference]: With dead ends: 2063 [2021-06-05 06:54:18,600 INFO L226 Difference]: Without dead ends: 2038 [2021-06-05 06:54:18,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1544.2ms TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:54:18,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-06-05 06:54:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1517. [2021-06-05 06:54:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.3337730870712403) internal successors, (5054), 1516 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5054 transitions. [2021-06-05 06:54:18,618 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5054 transitions. Word has length 26 [2021-06-05 06:54:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:18,618 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 5054 transitions. [2021-06-05 06:54:18,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5054 transitions. [2021-06-05 06:54:18,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:18,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:18,620 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:18,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1168,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:18,821 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:18,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:18,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2136387655, now seen corresponding path program 42 times [2021-06-05 06:54:18,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:18,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806499979] [2021-06-05 06:54:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:19,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:19,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806499979] [2021-06-05 06:54:19,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806499979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:19,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190666957] [2021-06-05 06:54:19,202 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 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 [2021-06-05 06:54:19,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:54:19,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:19,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:54:19,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:19,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 35 [2021-06-05 06:54:19,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 32 [2021-06-05 06:54:19,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 06:54:19,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-06-05 06:54:19,803 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 15 [2021-06-05 06:54:19,812 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2021-06-05 06:54:19,821 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 06:54:19,830 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 30 [2021-06-05 06:54:19,838 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 06:54:19,847 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 35 [2021-06-05 06:54:19,855 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 32 [2021-06-05 06:54:19,864 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 30 [2021-06-05 06:54:19,872 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 30 [2021-06-05 06:54:19,880 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 21 [2021-06-05 06:54:19,889 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 29 [2021-06-05 06:54:19,897 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:19,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:19,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 21 [2021-06-05 06:54:19,902 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:19,940 INFO L628 ElimStorePlain]: treesize reduction 44, result has 49.4 percent of original size [2021-06-05 06:54:19,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:54:19,941 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1121, output treesize:33 [2021-06-05 06:54:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:19,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190666957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:19,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:19,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:54:19,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407777683] [2021-06-05 06:54:19,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:54:19,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:19,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:54:19,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:54:19,976 INFO L87 Difference]: Start difference. First operand 1517 states and 5054 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:21,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:21,215 INFO L93 Difference]: Finished difference Result 1955 states and 6355 transitions. [2021-06-05 06:54:21,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:54:21,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:21,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:21,218 INFO L225 Difference]: With dead ends: 1955 [2021-06-05 06:54:21,218 INFO L226 Difference]: Without dead ends: 1929 [2021-06-05 06:54:21,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1418.9ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:54:21,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-06-05 06:54:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1521. [2021-06-05 06:54:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.331578947368421) internal successors, (5064), 1520 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:21,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5064 transitions. [2021-06-05 06:54:21,236 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5064 transitions. Word has length 26 [2021-06-05 06:54:21,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:21,236 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 5064 transitions. [2021-06-05 06:54:21,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:21,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5064 transitions. [2021-06-05 06:54:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:21,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:21,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:21,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1181 [2021-06-05 06:54:21,438 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:21,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1090705077, now seen corresponding path program 43 times [2021-06-05 06:54:21,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:21,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114492344] [2021-06-05 06:54:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:21,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:21,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114492344] [2021-06-05 06:54:21,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114492344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:21,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945974015] [2021-06-05 06:54:21,845 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 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 [2021-06-05 06:54:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:21,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:54:21,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:22,158 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 06:54:22,211 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_143], 6=[v_prenex_141, v_prenex_145]} [2021-06-05 06:54:22,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:22,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:22,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:22,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 21 [2021-06-05 06:54:22,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:22,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:22,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:22,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-06-05 06:54:22,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:22,348 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 06:54:22,349 INFO L628 ElimStorePlain]: treesize reduction 221, result has 44.2 percent of original size [2021-06-05 06:54:22,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:22,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 06:54:22,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:22,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:22,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:22,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:22,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:22,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:22,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 06:54:22,405 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:22,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:22,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:22,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:22,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:22,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:22,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 06:54:22,448 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:22,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:22,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:54:22,482 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:483, output treesize:57 [2021-06-05 06:54:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:22,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945974015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:22,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:22,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:54:22,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631837556] [2021-06-05 06:54:22,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:54:22,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:22,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:54:22,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:54:22,538 INFO L87 Difference]: Start difference. First operand 1521 states and 5064 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:23,903 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 06:54:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:24,030 INFO L93 Difference]: Finished difference Result 2127 states and 6917 transitions. [2021-06-05 06:54:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:54:24,030 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:24,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:24,033 INFO L225 Difference]: With dead ends: 2127 [2021-06-05 06:54:24,033 INFO L226 Difference]: Without dead ends: 2112 [2021-06-05 06:54:24,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1814.1ms TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:54:24,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-05 06:54:24,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1521. [2021-06-05 06:54:24,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.331578947368421) internal successors, (5064), 1520 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5064 transitions. [2021-06-05 06:54:24,053 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5064 transitions. Word has length 26 [2021-06-05 06:54:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:24,053 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 5064 transitions. [2021-06-05 06:54:24,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5064 transitions. [2021-06-05 06:54:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:24,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:24,062 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:24,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-06-05 06:54:24,276 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:24,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1679080501, now seen corresponding path program 27 times [2021-06-05 06:54:24,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:24,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497430734] [2021-06-05 06:54:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:24,614 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-05 06:54:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:24,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:24,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497430734] [2021-06-05 06:54:24,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497430734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:24,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735478189] [2021-06-05 06:54:24,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:54:24,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:54:24,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:24,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:54:24,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:25,407 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 06:54:25,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:25,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:25,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:25,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:54:25,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:25,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:25,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:25,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:54:25,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:25,578 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 06:54:25,579 INFO L628 ElimStorePlain]: treesize reduction 39, result has 81.0 percent of original size [2021-06-05 06:54:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:25,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:25,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:25,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 06:54:25,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:25,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:25,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 06:54:25,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:25,670 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.2 percent of original size [2021-06-05 06:54:25,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:25,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:25,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:54:25,676 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:25,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:25,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:25,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:25,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:54:25,716 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:25,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:25,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:54:25,749 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-05 06:54:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:25,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735478189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:25,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:25,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:54:25,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392904184] [2021-06-05 06:54:25,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:54:25,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:25,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:54:25,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:54:25,816 INFO L87 Difference]: Start difference. First operand 1521 states and 5064 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:26,291 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 06:54:27,084 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2021-06-05 06:54:27,327 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 06:54:27,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:27,473 INFO L93 Difference]: Finished difference Result 1978 states and 6388 transitions. [2021-06-05 06:54:27,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:54:27,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:27,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:27,476 INFO L225 Difference]: With dead ends: 1978 [2021-06-05 06:54:27,476 INFO L226 Difference]: Without dead ends: 1963 [2021-06-05 06:54:27,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2136.3ms TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:54:27,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-06-05 06:54:27,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1529. [2021-06-05 06:54:27,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.329842931937173) internal successors, (5088), 1528 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:27,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5088 transitions. [2021-06-05 06:54:27,494 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5088 transitions. Word has length 26 [2021-06-05 06:54:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:27,494 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5088 transitions. [2021-06-05 06:54:27,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:27,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5088 transitions. [2021-06-05 06:54:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:27,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:27,495 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:27,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1301 [2021-06-05 06:54:27,696 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:27,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:27,696 INFO L82 PathProgramCache]: Analyzing trace with hash -128698937, now seen corresponding path program 44 times [2021-06-05 06:54:27,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:27,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354637360] [2021-06-05 06:54:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:28,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:28,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354637360] [2021-06-05 06:54:28,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354637360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:28,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236665084] [2021-06-05 06:54:28,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:28,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:54:28,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:28,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:54:28,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:28,431 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 06:54:28,697 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_170, v_prenex_172, v_prenex_162, v_prenex_164], 5=[A, v_prenex_175, v_prenex_166, v_prenex_168]} [2021-06-05 06:54:28,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:28,725 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:54:28,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:54:28,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:29,094 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 156 [2021-06-05 06:54:29,094 INFO L628 ElimStorePlain]: treesize reduction 7, result has 98.5 percent of original size [2021-06-05 06:54:29,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:29,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:29,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 06:54:29,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:54:29,490 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 151 [2021-06-05 06:54:29,491 INFO L628 ElimStorePlain]: treesize reduction 7, result has 98.5 percent of original size [2021-06-05 06:54:29,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:29,517 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:54:29,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:54:29,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:29,701 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 06:54:29,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:29,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:29,725 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:54:29,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2021-06-05 06:54:29,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:29,911 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-05 06:54:29,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:29,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:29,938 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:54:29,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 06:54:29,941 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:30,300 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 134 [2021-06-05 06:54:30,300 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.2 percent of original size [2021-06-05 06:54:30,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:30,322 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:54:30,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 32 [2021-06-05 06:54:30,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:30,490 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-05 06:54:30,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:30,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:30,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:30,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 40 [2021-06-05 06:54:30,514 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:30,695 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 06:54:30,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:30,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:30,716 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:54:30,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 06:54:30,720 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:30,891 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 06:54:30,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:30,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:54:30,920 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:473, output treesize:269 [2021-06-05 06:54:31,047 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-05 06:54:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:31,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236665084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:31,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:31,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:54:31,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109107793] [2021-06-05 06:54:31,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:54:31,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:31,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:54:31,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:54:31,102 INFO L87 Difference]: Start difference. First operand 1529 states and 5088 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:31,508 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-06-05 06:54:31,757 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 50 [2021-06-05 06:54:32,145 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-06-05 06:54:33,173 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2021-06-05 06:54:33,385 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-06-05 06:54:33,565 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-06-05 06:54:34,057 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-06-05 06:54:34,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:34,433 INFO L93 Difference]: Finished difference Result 2479 states and 7802 transitions. [2021-06-05 06:54:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:54:34,434 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:34,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:34,437 INFO L225 Difference]: With dead ends: 2479 [2021-06-05 06:54:34,437 INFO L226 Difference]: Without dead ends: 2435 [2021-06-05 06:54:34,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 3333.2ms TimeCoverageRelationStatistics Valid=513, Invalid=2567, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:54:34,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-06-05 06:54:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1529. [2021-06-05 06:54:34,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.329842931937173) internal successors, (5088), 1528 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:34,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5088 transitions. [2021-06-05 06:54:34,458 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5088 transitions. Word has length 26 [2021-06-05 06:54:34,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:34,458 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5088 transitions. [2021-06-05 06:54:34,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:34,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5088 transitions. [2021-06-05 06:54:34,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:34,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:34,460 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:34,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1309,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:34,661 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:34,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1105017781, now seen corresponding path program 45 times [2021-06-05 06:54:34,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:34,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401307259] [2021-06-05 06:54:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:34,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:34,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401307259] [2021-06-05 06:54:34,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401307259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:34,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440535627] [2021-06-05 06:54:34,992 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 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 [2021-06-05 06:54:35,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:54:35,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:35,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 06:54:35,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:35,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:35,734 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:54:35,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 54 [2021-06-05 06:54:35,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:35,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:35,784 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-05 06:54:35,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 67 [2021-06-05 06:54:35,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:35,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:35,849 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:54:35,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-06-05 06:54:35,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:35,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:35,905 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:54:35,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 57 [2021-06-05 06:54:35,913 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:35,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:35,983 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-06-05 06:54:35,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 06:54:35,986 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:35,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:36,030 INFO L354 Elim1Store]: treesize reduction 27, result has 40.0 percent of original size [2021-06-05 06:54:36,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 43 [2021-06-05 06:54:36,034 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:36,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:36,086 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-05 06:54:36,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 67 [2021-06-05 06:54:36,094 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:36,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:36,139 INFO L354 Elim1Store]: treesize reduction 23, result has 48.9 percent of original size [2021-06-05 06:54:36,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 50 [2021-06-05 06:54:36,141 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:36,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:36,194 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-05 06:54:36,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 67 [2021-06-05 06:54:36,207 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:36,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:36,267 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-05 06:54:36,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 77 [2021-06-05 06:54:36,296 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:36,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:36,321 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:54:36,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 06:54:36,322 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:36,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:36,347 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:54:36,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:54:36,348 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:36,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:36,372 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:54:36,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 06:54:36,373 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:36,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:36,397 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:54:36,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 06:54:36,398 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:36,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:36,425 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:54:36,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 1 [2021-06-05 06:54:36,425 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:36,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:36,443 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:54:36,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 1 [2021-06-05 06:54:36,444 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:36,996 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 92 [2021-06-05 06:54:36,996 INFO L628 ElimStorePlain]: treesize reduction 622, result has 44.9 percent of original size [2021-06-05 06:54:37,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:54:37,025 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1289, output treesize:912 [2021-06-05 06:54:37,523 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 89 [2021-06-05 06:54:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:37,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440535627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:37,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:37,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:54:37,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215937417] [2021-06-05 06:54:37,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:54:37,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:37,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:54:37,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:54:37,755 INFO L87 Difference]: Start difference. First operand 1529 states and 5088 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:39,409 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 06:54:39,697 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-06-05 06:54:40,033 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 06:54:40,186 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 06:54:40,362 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-05 06:54:40,600 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 06:54:40,821 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 06:54:41,311 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-06-05 06:54:41,821 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2021-06-05 06:54:42,089 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 64 [2021-06-05 06:54:42,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:42,236 INFO L93 Difference]: Finished difference Result 2975 states and 9347 transitions. [2021-06-05 06:54:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:54:42,236 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:42,240 INFO L225 Difference]: With dead ends: 2975 [2021-06-05 06:54:42,240 INFO L226 Difference]: Without dead ends: 2945 [2021-06-05 06:54:42,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 4756.9ms TimeCoverageRelationStatistics Valid=517, Invalid=2789, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:54:42,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-06-05 06:54:42,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 1537. [2021-06-05 06:54:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.3430989583333335) internal successors, (5135), 1536 states have internal predecessors, (5135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:42,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 5135 transitions. [2021-06-05 06:54:42,264 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 5135 transitions. Word has length 26 [2021-06-05 06:54:42,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:42,264 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 5135 transitions. [2021-06-05 06:54:42,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 5135 transitions. [2021-06-05 06:54:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:42,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:42,266 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:42,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1344 [2021-06-05 06:54:42,466 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:42,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:42,466 INFO L82 PathProgramCache]: Analyzing trace with hash -89210125, now seen corresponding path program 28 times [2021-06-05 06:54:42,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:42,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599139808] [2021-06-05 06:54:42,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:42,753 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-06-05 06:54:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:42,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:42,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599139808] [2021-06-05 06:54:42,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599139808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:42,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88367441] [2021-06-05 06:54:42,980 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 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 [2021-06-05 06:54:43,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:54:43,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:43,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:54:43,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:43,351 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 06:54:43,537 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2021-06-05 06:54:43,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:43,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:43,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:54:43,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:43,750 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 06:54:43,751 INFO L628 ElimStorePlain]: treesize reduction 65, result has 72.1 percent of original size [2021-06-05 06:54:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:43,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:43,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:54:43,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:43,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:43,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:43,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:43,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:43,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 06:54:43,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:43,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:43,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 06:54:43,819 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:43,892 INFO L628 ElimStorePlain]: treesize reduction 19, result has 83.9 percent of original size [2021-06-05 06:54:43,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:43,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:43,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:54:43,897 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:43,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:43,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:54:43,930 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-05 06:54:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:43,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88367441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:43,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:43,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:54:43,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011066771] [2021-06-05 06:54:43,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:54:43,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:43,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:54:43,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:54:43,996 INFO L87 Difference]: Start difference. First operand 1537 states and 5135 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:44,514 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 06:54:44,777 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-05 06:54:45,127 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 06:54:45,395 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 06:54:45,669 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-05 06:54:45,844 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 06:54:46,131 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2021-06-05 06:54:46,356 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2021-06-05 06:54:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:46,511 INFO L93 Difference]: Finished difference Result 2083 states and 6714 transitions. [2021-06-05 06:54:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:54:46,511 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:46,514 INFO L225 Difference]: With dead ends: 2083 [2021-06-05 06:54:46,514 INFO L226 Difference]: Without dead ends: 2068 [2021-06-05 06:54:46,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2837.5ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:54:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-06-05 06:54:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1540. [2021-06-05 06:54:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 3.3443794671864846) internal successors, (5147), 1539 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 5147 transitions. [2021-06-05 06:54:46,537 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 5147 transitions. Word has length 26 [2021-06-05 06:54:46,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:46,538 INFO L482 AbstractCegarLoop]: Abstraction has 1540 states and 5147 transitions. [2021-06-05 06:54:46,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 5147 transitions. [2021-06-05 06:54:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:46,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:46,539 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:46,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1512,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:46,740 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:46,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:46,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1706742905, now seen corresponding path program 29 times [2021-06-05 06:54:46,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:46,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328461174] [2021-06-05 06:54:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:47,035 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-05 06:54:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:47,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:47,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328461174] [2021-06-05 06:54:47,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328461174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:47,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240549748] [2021-06-05 06:54:47,268 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 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 [2021-06-05 06:54:47,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:54:47,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:47,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:54:47,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:47,698 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 06:54:47,940 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 06:54:48,016 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:54:48,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 46 [2021-06-05 06:54:48,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:48,163 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2021-06-05 06:54:48,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:48,178 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:54:48,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 43 [2021-06-05 06:54:48,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:48,318 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-06-05 06:54:48,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:48,335 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:54:48,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 57 [2021-06-05 06:54:48,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:48,475 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-05 06:54:48,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:48,493 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:54:48,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 06:54:48,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:48,627 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 06:54:48,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:48,644 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:54:48,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 50 [2021-06-05 06:54:48,645 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:48,773 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 06:54:48,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:48,789 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:54:48,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 06:54:48,791 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:48,918 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 06:54:48,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:48,930 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:54:48,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 53 [2021-06-05 06:54:48,931 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:49,038 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 06:54:49,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:49,051 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:54:49,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 47 [2021-06-05 06:54:49,054 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:49,253 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-06-05 06:54:49,253 INFO L628 ElimStorePlain]: treesize reduction 8, result has 96.6 percent of original size [2021-06-05 06:54:49,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:54:49,260 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:687, output treesize:216 [2021-06-05 06:54:49,386 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-06-05 06:54:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:49,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240549748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:49,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:49,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:54:49,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372700386] [2021-06-05 06:54:49,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:54:49,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:49,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:54:49,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:54:49,463 INFO L87 Difference]: Start difference. First operand 1540 states and 5147 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:49,977 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-06-05 06:54:50,255 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 06:54:50,810 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-06-05 06:54:51,512 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2021-06-05 06:54:51,989 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 124 [2021-06-05 06:54:52,496 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 111 [2021-06-05 06:54:53,059 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 128 [2021-06-05 06:54:53,653 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 123 [2021-06-05 06:54:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:54,179 INFO L93 Difference]: Finished difference Result 2320 states and 7403 transitions. [2021-06-05 06:54:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:54:54,179 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:54,182 INFO L225 Difference]: With dead ends: 2320 [2021-06-05 06:54:54,182 INFO L226 Difference]: Without dead ends: 2301 [2021-06-05 06:54:54,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4903.1ms TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:54:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-06-05 06:54:54,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1535. [2021-06-05 06:54:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3428943937418514) internal successors, (5128), 1534 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5128 transitions. [2021-06-05 06:54:54,203 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5128 transitions. Word has length 26 [2021-06-05 06:54:54,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:54,203 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5128 transitions. [2021-06-05 06:54:54,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:54,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5128 transitions. [2021-06-05 06:54:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:54,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:54,205 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:54,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1521 [2021-06-05 06:54:54,420 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:54,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:54,420 INFO L82 PathProgramCache]: Analyzing trace with hash 97294587, now seen corresponding path program 46 times [2021-06-05 06:54:54,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:54,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129483284] [2021-06-05 06:54:54,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:54,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:54,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129483284] [2021-06-05 06:54:54,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129483284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:54,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073068384] [2021-06-05 06:54:54,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:54,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:54:54,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:54,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:54:54,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:55,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 06:54:55,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:54:55,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 06:54:55,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 06:54:55,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 06:54:55,484 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 06:54:55,493 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:54:55,502 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 06:54:55,511 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 06:54:55,520 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:54:55,529 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 06:54:55,537 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 06:54:55,545 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 06:54:55,553 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 06:54:55,561 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:54:55,569 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:55,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:55,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 06:54:55,574 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:55,616 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-06-05 06:54:55,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:54:55,617 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-06-05 06:54:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:55,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073068384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:55,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:55,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 06:54:55,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033744904] [2021-06-05 06:54:55,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:54:55,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:55,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:54:55,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:54:55,672 INFO L87 Difference]: Start difference. First operand 1535 states and 5128 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:57,770 INFO L93 Difference]: Finished difference Result 3148 states and 9991 transitions. [2021-06-05 06:54:57,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:54:57,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:54:57,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:57,774 INFO L225 Difference]: With dead ends: 3148 [2021-06-05 06:54:57,774 INFO L226 Difference]: Without dead ends: 3112 [2021-06-05 06:54:57,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2147.4ms TimeCoverageRelationStatistics Valid=438, Invalid=1914, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:54:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-06-05 06:54:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 1630. [2021-06-05 06:54:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.365254757519951) internal successors, (5482), 1629 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5482 transitions. [2021-06-05 06:54:57,799 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5482 transitions. Word has length 26 [2021-06-05 06:54:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:57,799 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5482 transitions. [2021-06-05 06:54:57,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5482 transitions. [2021-06-05 06:54:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:54:57,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:57,801 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:58,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:58,001 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:58,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1930943239, now seen corresponding path program 47 times [2021-06-05 06:54:58,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:58,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230890843] [2021-06-05 06:54:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:58,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:58,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230890843] [2021-06-05 06:54:58,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230890843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:58,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241092195] [2021-06-05 06:54:58,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:58,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:54:58,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:58,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:54:58,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:59,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,049 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:54:59,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-06-05 06:54:59,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,074 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:59,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 06:54:59,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,091 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:59,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:54:59,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,107 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:59,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 06:54:59,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,132 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 06:54:59,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 39 [2021-06-05 06:54:59,133 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,157 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 06:54:59,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 30 [2021-06-05 06:54:59,159 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,175 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:59,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 06:54:59,176 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,191 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:59,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 06:54:59,192 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:59,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 60 [2021-06-05 06:54:59,226 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,241 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:59,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 06:54:59,243 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,259 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:59,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 06:54:59,260 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,276 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:59,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 1 [2021-06-05 06:54:59,277 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,293 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:59,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 06:54:59,294 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,309 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:59,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:54:59,310 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,332 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:59,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:54:59,332 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:59,342 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:54:59,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:54:59,342 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:59,434 INFO L628 ElimStorePlain]: treesize reduction 101, result has 48.2 percent of original size [2021-06-05 06:54:59,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:54:59,437 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1065, output treesize:93 [2021-06-05 06:54:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:59,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241092195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:59,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:59,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 06:54:59,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144972995] [2021-06-05 06:54:59,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:54:59,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:59,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:54:59,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:54:59,602 INFO L87 Difference]: Start difference. First operand 1630 states and 5482 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:01,297 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 06:55:01,727 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 06:55:01,858 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-06-05 06:55:01,991 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 06:55:02,231 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 06:55:02,529 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-05 06:55:02,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:02,657 INFO L93 Difference]: Finished difference Result 3759 states and 11877 transitions. [2021-06-05 06:55:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:55:02,657 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:55:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:02,663 INFO L225 Difference]: With dead ends: 3759 [2021-06-05 06:55:02,663 INFO L226 Difference]: Without dead ends: 3702 [2021-06-05 06:55:02,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 3062.9ms TimeCoverageRelationStatistics Valid=575, Invalid=2395, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:55:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2021-06-05 06:55:02,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1786. [2021-06-05 06:55:02,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 3.3871148459383753) internal successors, (6046), 1785 states have internal predecessors, (6046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 6046 transitions. [2021-06-05 06:55:02,703 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 6046 transitions. Word has length 26 [2021-06-05 06:55:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:02,703 INFO L482 AbstractCegarLoop]: Abstraction has 1786 states and 6046 transitions. [2021-06-05 06:55:02,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 6046 transitions. [2021-06-05 06:55:02,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:55:02,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:02,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:02,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1649,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:02,906 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:02,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:02,906 INFO L82 PathProgramCache]: Analyzing trace with hash -513521361, now seen corresponding path program 30 times [2021-06-05 06:55:02,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:02,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994699428] [2021-06-05 06:55:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:03,255 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 52 [2021-06-05 06:55:03,494 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 06:55:03,672 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-06-05 06:55:03,876 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 38 [2021-06-05 06:55:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:04,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:04,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994699428] [2021-06-05 06:55:04,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994699428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:04,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668423231] [2021-06-05 06:55:04,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:04,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:55:04,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:04,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:55:04,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:04,598 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 06:55:05,010 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2021-06-05 06:55:05,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:05,253 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 06:55:05,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 1 [2021-06-05 06:55:05,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:05,287 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 06:55:05,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 68 [2021-06-05 06:55:05,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:05,855 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 179 [2021-06-05 06:55:05,856 INFO L628 ElimStorePlain]: treesize reduction 697, result has 46.5 percent of original size [2021-06-05 06:55:05,880 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:55:05,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 60 [2021-06-05 06:55:05,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:06,052 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-05 06:55:06,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:06,076 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:55:06,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 50 [2021-06-05 06:55:06,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:06,238 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 06:55:06,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:06,270 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-06-05 06:55:06,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 74 [2021-06-05 06:55:06,272 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:06,440 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 06:55:06,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:06,465 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:55:06,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2021-06-05 06:55:06,468 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:06,624 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 06:55:06,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:06,658 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 06:55:06,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 67 [2021-06-05 06:55:06,660 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:06,808 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 06:55:06,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:06,835 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:55:06,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2021-06-05 06:55:06,837 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:06,998 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 06:55:06,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:07,025 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 06:55:07,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 62 [2021-06-05 06:55:07,028 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:07,171 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 06:55:07,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:07,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:55:07,193 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1441, output treesize:516 [2021-06-05 06:55:07,416 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-05 06:55:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:07,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668423231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:07,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:07,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 06:55:07,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637648035] [2021-06-05 06:55:07,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:55:07,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:07,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:55:07,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:55:07,526 INFO L87 Difference]: Start difference. First operand 1786 states and 6046 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:08,093 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2021-06-05 06:55:08,425 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2021-06-05 06:55:08,865 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-05 06:55:09,303 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 06:55:09,651 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-06-05 06:55:09,930 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 06:55:10,256 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-06-05 06:55:10,855 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 126 [2021-06-05 06:55:12,092 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 241 DAG size of output: 229 [2021-06-05 06:55:12,749 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 152 [2021-06-05 06:55:13,807 WARN L205 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 160 [2021-06-05 06:55:15,622 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 286 DAG size of output: 266 [2021-06-05 06:55:17,043 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 262 DAG size of output: 240 [2021-06-05 06:55:18,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:18,035 INFO L93 Difference]: Finished difference Result 2363 states and 7775 transitions. [2021-06-05 06:55:18,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:55:18,035 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:55:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:18,039 INFO L225 Difference]: With dead ends: 2363 [2021-06-05 06:55:18,039 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 06:55:18,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 10528.3ms TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:55:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 06:55:18,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1795. [2021-06-05 06:55:18,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.3851727982162765) internal successors, (6073), 1794 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 6073 transitions. [2021-06-05 06:55:18,060 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 6073 transitions. Word has length 26 [2021-06-05 06:55:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:18,061 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 6073 transitions. [2021-06-05 06:55:18,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 6073 transitions. [2021-06-05 06:55:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:55:18,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:18,063 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:18,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1772 [2021-06-05 06:55:18,263 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:18,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:18,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2131054141, now seen corresponding path program 31 times [2021-06-05 06:55:18,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:18,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315369977] [2021-06-05 06:55:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:18,576 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-06-05 06:55:18,704 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 06:55:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:18,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:18,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315369977] [2021-06-05 06:55:18,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315369977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:18,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365796371] [2021-06-05 06:55:18,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:18,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:55:18,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:19,257 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 06:55:19,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:19,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:19,406 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 06:55:19,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 64 treesize of output 1 [2021-06-05 06:55:19,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:19,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:19,441 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 06:55:19,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 75 treesize of output 60 [2021-06-05 06:55:19,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:19,899 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 177 [2021-06-05 06:55:19,900 INFO L628 ElimStorePlain]: treesize reduction 703, result has 45.7 percent of original size [2021-06-05 06:55:19,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:19,921 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-05 06:55:19,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-05 06:55:19,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:20,065 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 06:55:20,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:20,080 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:55:20,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 06:55:20,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:20,220 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-06-05 06:55:20,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:20,238 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:55:20,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 42 [2021-06-05 06:55:20,240 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:20,500 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 138 [2021-06-05 06:55:20,500 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.3 percent of original size [2021-06-05 06:55:20,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:20,527 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 06:55:20,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 63 [2021-06-05 06:55:20,528 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:20,652 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 06:55:20,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:20,667 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:55:20,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-06-05 06:55:20,668 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:20,794 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 06:55:20,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:20,807 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:55:20,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-06-05 06:55:20,808 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:20,918 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 06:55:20,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:20,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:20,938 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 06:55:20,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 63 [2021-06-05 06:55:20,940 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:21,041 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 06:55:21,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:21,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:55:21,056 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1437, output treesize:216 [2021-06-05 06:55:21,195 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-06-05 06:55:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:21,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365796371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:21,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:21,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:55:21,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313463667] [2021-06-05 06:55:21,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:55:21,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:21,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:55:21,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:55:21,275 INFO L87 Difference]: Start difference. First operand 1795 states and 6073 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:21,536 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-06-05 06:55:21,923 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-06-05 06:55:22,649 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 06:55:22,972 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 06:55:23,445 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 134 [2021-06-05 06:55:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:23,839 INFO L93 Difference]: Finished difference Result 2510 states and 8287 transitions. [2021-06-05 06:55:23,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:55:23,839 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:55:23,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:23,842 INFO L225 Difference]: With dead ends: 2510 [2021-06-05 06:55:23,842 INFO L226 Difference]: Without dead ends: 2491 [2021-06-05 06:55:23,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3032.9ms TimeCoverageRelationStatistics Valid=301, Invalid=1181, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:55:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-06-05 06:55:23,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1795. [2021-06-05 06:55:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.3851727982162765) internal successors, (6073), 1794 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 6073 transitions. [2021-06-05 06:55:23,866 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 6073 transitions. Word has length 26 [2021-06-05 06:55:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:23,866 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 6073 transitions. [2021-06-05 06:55:23,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:23,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 6073 transitions. [2021-06-05 06:55:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:55:23,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:23,868 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:24,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1815,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:24,073 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:24,073 INFO L82 PathProgramCache]: Analyzing trace with hash 473970251, now seen corresponding path program 32 times [2021-06-05 06:55:24,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:24,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147715621] [2021-06-05 06:55:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:24,336 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 06:55:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:24,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:24,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147715621] [2021-06-05 06:55:24,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147715621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:24,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970946865] [2021-06-05 06:55:24,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:24,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:55:24,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:24,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:55:24,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:25,120 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_238], 3=[v_prenex_239, A, v_prenex_237]} [2021-06-05 06:55:25,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:25,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 06:55:25,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:25,157 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:55:25,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:55:25,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:25,327 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 06:55:25,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:25,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:25,352 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:55:25,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 71 [2021-06-05 06:55:25,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:25,370 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:55:25,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 58 [2021-06-05 06:55:25,372 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:25,663 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-06-05 06:55:25,663 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.3 percent of original size [2021-06-05 06:55:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:25,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:25,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 57 [2021-06-05 06:55:25,685 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:25,703 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:55:25,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 06:55:25,706 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:25,965 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-06-05 06:55:25,965 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.4 percent of original size [2021-06-05 06:55:25,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:25,989 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:55:25,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 49 [2021-06-05 06:55:25,990 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:26,009 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:55:26,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 06:55:26,010 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:26,222 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 06:55:26,223 INFO L628 ElimStorePlain]: treesize reduction 39, result has 85.0 percent of original size [2021-06-05 06:55:26,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 06:55:26,233 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:641, output treesize:342 [2021-06-05 06:55:26,409 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-06-05 06:55:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:26,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970946865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:26,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:26,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:55:26,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896157099] [2021-06-05 06:55:26,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:55:26,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:26,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:55:26,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:55:26,610 INFO L87 Difference]: Start difference. First operand 1795 states and 6073 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:26,810 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 30 [2021-06-05 06:55:27,095 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-05 06:55:27,529 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 06:55:27,705 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 64 [2021-06-05 06:55:27,908 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 06:55:28,033 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2021-06-05 06:55:28,285 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2021-06-05 06:55:28,440 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-05 06:55:28,796 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 06:55:29,053 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-06-05 06:55:29,290 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-05 06:55:29,447 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-05 06:55:30,114 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-06-05 06:55:30,433 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-06-05 06:55:31,025 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-06-05 06:55:31,653 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 85 [2021-06-05 06:55:32,226 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 95 [2021-06-05 06:55:32,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:32,635 INFO L93 Difference]: Finished difference Result 2613 states and 8461 transitions. [2021-06-05 06:55:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:55:32,635 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:55:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:32,639 INFO L225 Difference]: With dead ends: 2613 [2021-06-05 06:55:32,639 INFO L226 Difference]: Without dead ends: 2544 [2021-06-05 06:55:32,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 6308.9ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:55:32,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-06-05 06:55:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1779. [2021-06-05 06:55:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 3.3830146231721034) internal successors, (6015), 1778 states have internal predecessors, (6015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 6015 transitions. [2021-06-05 06:55:32,662 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 6015 transitions. Word has length 26 [2021-06-05 06:55:32,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:32,662 INFO L482 AbstractCegarLoop]: Abstraction has 1779 states and 6015 transitions. [2021-06-05 06:55:32,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:32,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 6015 transitions. [2021-06-05 06:55:32,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:55:32,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:32,664 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:32,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1849,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:32,865 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:32,865 INFO L82 PathProgramCache]: Analyzing trace with hash -923228447, now seen corresponding path program 48 times [2021-06-05 06:55:32,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:32,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475550045] [2021-06-05 06:55:32,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:33,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:33,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475550045] [2021-06-05 06:55:33,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475550045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:33,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290646137] [2021-06-05 06:55:33,202 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 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 [2021-06-05 06:55:33,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:55:33,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:33,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:55:33,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:33,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2021-06-05 06:55:33,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:55:33,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-06-05 06:55:33,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-06-05 06:55:33,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 06:55:33,823 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-06-05 06:55:33,832 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 31 [2021-06-05 06:55:33,842 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 06:55:33,851 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-06-05 06:55:33,861 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-06-05 06:55:33,870 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-06-05 06:55:33,881 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 06:55:33,890 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-05 06:55:33,900 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-06-05 06:55:33,909 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 06:55:33,918 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:33,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:33,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:33,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 06:55:33,927 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:34,000 INFO L628 ElimStorePlain]: treesize reduction 325, result has 11.2 percent of original size [2021-06-05 06:55:34,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:55:34,001 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1045, output treesize:29 [2021-06-05 06:55:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:34,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290646137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:34,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:34,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:55:34,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614065192] [2021-06-05 06:55:34,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:55:34,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:34,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:55:34,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:55:34,035 INFO L87 Difference]: Start difference. First operand 1779 states and 6015 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:35,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:35,471 INFO L93 Difference]: Finished difference Result 2238 states and 7371 transitions. [2021-06-05 06:55:35,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:55:35,477 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:55:35,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:35,480 INFO L225 Difference]: With dead ends: 2238 [2021-06-05 06:55:35,480 INFO L226 Difference]: Without dead ends: 2216 [2021-06-05 06:55:35,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1435.3ms TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:55:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-06-05 06:55:35,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1764. [2021-06-05 06:55:35,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3851389676687464) internal successors, (5968), 1763 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5968 transitions. [2021-06-05 06:55:35,502 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5968 transitions. Word has length 26 [2021-06-05 06:55:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:35,502 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 5968 transitions. [2021-06-05 06:55:35,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5968 transitions. [2021-06-05 06:55:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:55:35,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:35,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:35,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1876 [2021-06-05 06:55:35,722 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:35,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:35,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2265419, now seen corresponding path program 49 times [2021-06-05 06:55:35,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:35,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515368267] [2021-06-05 06:55:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:36,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:36,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515368267] [2021-06-05 06:55:36,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515368267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:36,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405837330] [2021-06-05 06:55:36,221 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 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 [2021-06-05 06:55:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:36,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:55:36,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:36,627 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_240], 5=[v_prenex_242, v_prenex_244]} [2021-06-05 06:55:36,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:36,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:36,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:36,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:36,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:55:36,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:36,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:36,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:36,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:36,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:55:36,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:36,763 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 06:55:36,764 INFO L628 ElimStorePlain]: treesize reduction 195, result has 44.9 percent of original size [2021-06-05 06:55:36,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:36,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:36,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:36,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 06:55:36,772 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:36,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:36,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:36,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:36,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:36,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:36,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2021-06-05 06:55:36,820 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:36,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:36,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:36,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:36,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:36,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 24 [2021-06-05 06:55:36,861 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:36,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:36,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:55:36,895 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:429, output treesize:55 [2021-06-05 06:55:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:36,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405837330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:36,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:36,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:55:36,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361982699] [2021-06-05 06:55:36,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:55:36,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:36,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:55:36,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:55:36,953 INFO L87 Difference]: Start difference. First operand 1764 states and 5968 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:37,956 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2021-06-05 06:55:38,734 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 06:55:39,056 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-06-05 06:55:39,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:39,808 INFO L93 Difference]: Finished difference Result 2440 states and 8027 transitions. [2021-06-05 06:55:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:55:39,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:55:39,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:39,811 INFO L225 Difference]: With dead ends: 2440 [2021-06-05 06:55:39,812 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 06:55:39,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2926.8ms TimeCoverageRelationStatistics Valid=496, Invalid=2054, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:55:39,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 06:55:39,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1764. [2021-06-05 06:55:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3851389676687464) internal successors, (5968), 1763 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:39,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5968 transitions. [2021-06-05 06:55:39,833 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5968 transitions. Word has length 26 [2021-06-05 06:55:39,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:39,833 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 5968 transitions. [2021-06-05 06:55:39,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:39,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5968 transitions. [2021-06-05 06:55:39,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:55:39,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:39,835 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:40,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1982 [2021-06-05 06:55:40,036 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:40,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1175639121, now seen corresponding path program 50 times [2021-06-05 06:55:40,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:40,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197755160] [2021-06-05 06:55:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:40,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:40,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197755160] [2021-06-05 06:55:40,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197755160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:40,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312572539] [2021-06-05 06:55:40,514 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 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 [2021-06-05 06:55:40,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:55:40,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:40,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:55:40,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:40,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,782 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-05 06:55:40,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 37 [2021-06-05 06:55:40,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:40,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:40,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2021-06-05 06:55:40,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:40,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,847 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-05 06:55:40,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2021-06-05 06:55:40,854 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:40,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,880 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 06:55:40,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 39 [2021-06-05 06:55:40,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:40,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,909 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 06:55:40,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 06:55:40,912 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:40,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,927 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:40,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 06:55:40,928 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:40,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,959 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-05 06:55:40,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 46 [2021-06-05 06:55:40,962 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:40,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,976 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:40,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:55:40,978 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:40,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:40,993 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:40,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 06:55:40,994 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:40,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:41,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:41,008 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:41,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:55:41,009 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:41,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:41,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:41,023 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:41,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:55:41,024 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:41,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:41,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:41,040 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:41,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 06:55:41,040 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:41,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:41,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:41,060 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:41,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 06:55:41,061 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:41,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:41,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:41,075 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:41,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 06:55:41,076 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:41,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:41,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:41,090 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:55:41,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:55:41,091 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:41,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:41,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:41,106 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 06:55:41,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2021-06-05 06:55:41,108 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:41,171 INFO L628 ElimStorePlain]: treesize reduction 168, result has 24.7 percent of original size [2021-06-05 06:55:41,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:55:41,172 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:55 [2021-06-05 06:55:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:41,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312572539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:41,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:41,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-05 06:55:41,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898593136] [2021-06-05 06:55:41,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:55:41,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:41,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:55:41,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:55:41,283 INFO L87 Difference]: Start difference. First operand 1764 states and 5968 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:42,766 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 06:55:42,932 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-05 06:55:43,062 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-05 06:55:43,217 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 06:55:43,780 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 06:55:44,074 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-06-05 06:55:44,320 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 06:55:45,014 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 06:55:45,335 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2021-06-05 06:55:46,002 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 06:55:46,130 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-05 06:55:46,402 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-05 06:55:46,618 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 06:55:47,030 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 06:55:47,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:47,388 INFO L93 Difference]: Finished difference Result 3056 states and 9811 transitions. [2021-06-05 06:55:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 06:55:47,389 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:55:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:47,393 INFO L225 Difference]: With dead ends: 3056 [2021-06-05 06:55:47,393 INFO L226 Difference]: Without dead ends: 3009 [2021-06-05 06:55:47,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 5785.2ms TimeCoverageRelationStatistics Valid=1062, Invalid=5580, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 06:55:47,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-06-05 06:55:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 1784. [2021-06-05 06:55:47,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.37633202467751) internal successors, (6020), 1783 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 6020 transitions. [2021-06-05 06:55:47,420 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 6020 transitions. Word has length 26 [2021-06-05 06:55:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:47,420 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 6020 transitions. [2021-06-05 06:55:47,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 6020 transitions. [2021-06-05 06:55:47,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:55:47,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:47,422 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:47,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-06-05 06:55:47,623 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:47,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:47,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1573091019, now seen corresponding path program 51 times [2021-06-05 06:55:47,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:47,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626244001] [2021-06-05 06:55:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:48,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:48,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626244001] [2021-06-05 06:55:48,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626244001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:48,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700951982] [2021-06-05 06:55:48,070 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 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 [2021-06-05 06:55:48,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:55:48,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:48,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:55:48,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:48,520 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 06:55:48,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:48,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 66 [2021-06-05 06:55:49,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:55:49,072 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-05 06:55:49,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2021-06-05 06:55:49,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:50,231 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 201 DAG size of output: 180 [2021-06-05 06:55:50,232 INFO L628 ElimStorePlain]: treesize reduction 96, result has 91.8 percent of original size [2021-06-05 06:55:50,296 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 06:55:50,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2021-06-05 06:55:50,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:50,353 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-06-05 06:55:50,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 44 [2021-06-05 06:55:50,359 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:51,467 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 181 DAG size of output: 174 [2021-06-05 06:55:51,468 INFO L628 ElimStorePlain]: treesize reduction 21, result has 98.0 percent of original size [2021-06-05 06:55:51,536 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 06:55:51,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-06-05 06:55:51,560 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:51,609 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-06-05 06:55:51,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 41 [2021-06-05 06:55:51,611 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:52,820 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 200 DAG size of output: 187 [2021-06-05 06:55:52,820 INFO L628 ElimStorePlain]: treesize reduction 66, result has 94.1 percent of original size [2021-06-05 06:55:52,883 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 06:55:52,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 54 [2021-06-05 06:55:52,892 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:52,959 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 06:55:52,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2021-06-05 06:55:53,003 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:54,242 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 207 DAG size of output: 184 [2021-06-05 06:55:54,243 INFO L628 ElimStorePlain]: treesize reduction 163, result has 86.3 percent of original size [2021-06-05 06:55:54,311 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 06:55:54,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-06-05 06:55:54,324 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:54,389 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-06-05 06:55:54,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 52 [2021-06-05 06:55:54,395 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:56,275 WARN L205 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 202 DAG size of output: 192 [2021-06-05 06:55:56,276 INFO L628 ElimStorePlain]: treesize reduction 53, result has 95.1 percent of original size [2021-06-05 06:55:56,348 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-05 06:55:56,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2021-06-05 06:55:56,359 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:56,432 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 06:55:56,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 65 [2021-06-05 06:55:56,471 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:58,240 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 220 DAG size of output: 180 [2021-06-05 06:55:58,241 INFO L628 ElimStorePlain]: treesize reduction 304, result has 75.8 percent of original size [2021-06-05 06:55:58,310 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 06:55:58,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2021-06-05 06:55:58,341 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:58,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:58,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 80 [2021-06-05 06:55:58,482 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:59,875 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 279 DAG size of output: 208 [2021-06-05 06:55:59,876 INFO L628 ElimStorePlain]: treesize reduction 459, result has 68.3 percent of original size [2021-06-05 06:55:59,943 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 06:55:59,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2021-06-05 06:55:59,947 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:59,996 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-06-05 06:55:59,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 49 [2021-06-05 06:56:00,001 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:01,200 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 199 DAG size of output: 198 [2021-06-05 06:56:01,200 INFO L628 ElimStorePlain]: treesize reduction 8, result has 99.2 percent of original size [2021-06-05 06:56:01,553 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 261 [2021-06-05 06:56:01,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-06-05 06:56:01,556 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:1105, output treesize:5253 [2021-06-05 06:56:02,977 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 258 DAG size of output: 107 [2021-06-05 06:56:03,448 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 06:56:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:03,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700951982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:03,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:03,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:56:03,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757146210] [2021-06-05 06:56:03,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:56:03,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:03,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:56:03,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:56:03,734 INFO L87 Difference]: Start difference. First operand 1784 states and 6020 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:04,183 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 36 [2021-06-05 06:56:04,464 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-05 06:56:04,750 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 06:56:05,488 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 62 [2021-06-05 06:56:05,629 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 06:56:06,369 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-06-05 06:56:07,087 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 72 [2021-06-05 06:56:07,368 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2021-06-05 06:56:07,992 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 63 [2021-06-05 06:56:08,173 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 37 [2021-06-05 06:56:08,600 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-05 06:56:09,152 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-06-05 06:56:09,590 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 06:56:10,484 WARN L205 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 109 [2021-06-05 06:56:10,811 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 85 [2021-06-05 06:56:11,428 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 84 [2021-06-05 06:56:11,674 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 40 [2021-06-05 06:56:11,930 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 48 [2021-06-05 06:56:12,504 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 75 [2021-06-05 06:56:12,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:12,564 INFO L93 Difference]: Finished difference Result 2817 states and 9172 transitions. [2021-06-05 06:56:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:56:12,565 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:12,568 INFO L225 Difference]: With dead ends: 2817 [2021-06-05 06:56:12,568 INFO L226 Difference]: Without dead ends: 2787 [2021-06-05 06:56:12,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 10194.5ms TimeCoverageRelationStatistics Valid=559, Invalid=2981, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:56:12,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-06-05 06:56:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 1785. [2021-06-05 06:56:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.3778026905829597) internal successors, (6026), 1784 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6026 transitions. [2021-06-05 06:56:12,593 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6026 transitions. Word has length 26 [2021-06-05 06:56:12,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:12,593 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6026 transitions. [2021-06-05 06:56:12,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6026 transitions. [2021-06-05 06:56:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:12,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:12,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:12,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2029,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:12,795 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:12,796 INFO L82 PathProgramCache]: Analyzing trace with hash 238696335, now seen corresponding path program 52 times [2021-06-05 06:56:12,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:12,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313418459] [2021-06-05 06:56:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:13,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:13,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313418459] [2021-06-05 06:56:13,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313418459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:13,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527890098] [2021-06-05 06:56:13,259 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 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 [2021-06-05 06:56:13,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:56:13,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:13,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:56:13,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:13,642 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 06:56:13,857 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_271, v_prenex_269], 6=[A, v_prenex_273]} [2021-06-05 06:56:13,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:13,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:13,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:13,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-06-05 06:56:13,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:13,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:13,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:13,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-06-05 06:56:13,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:14,010 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 06:56:14,010 INFO L628 ElimStorePlain]: treesize reduction 220, result has 44.2 percent of original size [2021-06-05 06:56:14,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:14,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 06:56:14,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:14,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:14,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:14,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:14,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:14,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:14,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2021-06-05 06:56:14,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:14,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:14,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:14,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:14,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:14,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:14,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 30 [2021-06-05 06:56:14,116 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:14,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:14,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:56:14,149 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:485, output treesize:67 [2021-06-05 06:56:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:14,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527890098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:14,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:14,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:56:14,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584068271] [2021-06-05 06:56:14,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:56:14,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:14,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:56:14,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:56:14,202 INFO L87 Difference]: Start difference. First operand 1785 states and 6026 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:15,525 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 06:56:15,862 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-06-05 06:56:16,104 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-06-05 06:56:16,296 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-06-05 06:56:16,838 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-06-05 06:56:17,052 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-06-05 06:56:17,327 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 06:56:17,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:17,352 INFO L93 Difference]: Finished difference Result 2300 states and 7575 transitions. [2021-06-05 06:56:17,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:56:17,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:17,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:17,357 INFO L225 Difference]: With dead ends: 2300 [2021-06-05 06:56:17,357 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 06:56:17,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 3388.0ms TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:56:17,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 06:56:17,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1783. [2021-06-05 06:56:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.377665544332211) internal successors, (6019), 1782 states have internal predecessors, (6019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:17,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6019 transitions. [2021-06-05 06:56:17,379 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6019 transitions. Word has length 26 [2021-06-05 06:56:17,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:17,379 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6019 transitions. [2021-06-05 06:56:17,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6019 transitions. [2021-06-05 06:56:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:17,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:17,382 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:17,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2297,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:17,582 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:17,582 INFO L82 PathProgramCache]: Analyzing trace with hash -169937649, now seen corresponding path program 53 times [2021-06-05 06:56:17,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:17,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913983371] [2021-06-05 06:56:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:17,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:17,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913983371] [2021-06-05 06:56:17,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913983371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:17,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305722243] [2021-06-05 06:56:17,915 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 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 [2021-06-05 06:56:17,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:56:17,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:17,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:56:17,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:18,399 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-05 06:56:18,681 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 06:56:18,944 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_282, v_prenex_284, v_prenex_285, v_prenex_286, v_prenex_287, v_prenex_288], 6=[v_prenex_283]} [2021-06-05 06:56:18,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,979 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 06:56:18,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:56:18,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:18,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:18,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:19,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:19,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 46 [2021-06-05 06:56:19,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 06:56:19,948 WARN L205 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 192 [2021-06-05 06:56:19,948 INFO L628 ElimStorePlain]: treesize reduction 32, result has 97.5 percent of original size [2021-06-05 06:56:19,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:19,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:19,985 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:56:19,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 36 [2021-06-05 06:56:19,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:19,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:19,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:20,019 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:56:20,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 41 [2021-06-05 06:56:20,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:20,863 WARN L205 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 178 [2021-06-05 06:56:20,864 INFO L628 ElimStorePlain]: treesize reduction 50, result has 95.8 percent of original size [2021-06-05 06:56:20,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:20,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:20,906 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 06:56:20,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-06-05 06:56:20,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:20,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:20,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:20,940 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 06:56:20,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 41 [2021-06-05 06:56:20,944 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:21,707 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 166 [2021-06-05 06:56:21,707 INFO L628 ElimStorePlain]: treesize reduction 4, result has 99.6 percent of original size [2021-06-05 06:56:21,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:21,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:21,740 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 06:56:21,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 37 [2021-06-05 06:56:21,741 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:21,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:21,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:21,770 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:56:21,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 44 [2021-06-05 06:56:21,772 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:22,440 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 154 [2021-06-05 06:56:22,441 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.2 percent of original size [2021-06-05 06:56:22,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:22,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:22,474 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 06:56:22,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 06:56:22,476 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:22,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:22,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:22,508 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 06:56:22,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2021-06-05 06:56:22,511 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:22,813 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 06:56:22,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:22,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:22,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:22,846 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:56:22,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-06-05 06:56:22,849 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:22,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:22,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:22,864 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:56:22,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 06:56:22,865 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:23,374 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 131 [2021-06-05 06:56:23,375 INFO L628 ElimStorePlain]: treesize reduction 10, result has 98.7 percent of original size [2021-06-05 06:56:23,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:23,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:23,403 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 06:56:23,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 32 [2021-06-05 06:56:23,405 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:23,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:23,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:23,430 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:56:23,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2021-06-05 06:56:23,432 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:23,872 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 118 [2021-06-05 06:56:23,872 INFO L628 ElimStorePlain]: treesize reduction 37, result has 94.9 percent of original size [2021-06-05 06:56:23,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:23,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:23,912 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-06-05 06:56:23,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 176 treesize of output 104 [2021-06-05 06:56:23,922 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:23,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:23,934 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:56:23,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 1 [2021-06-05 06:56:23,935 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:24,282 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2021-06-05 06:56:24,282 INFO L628 ElimStorePlain]: treesize reduction 68, result has 85.0 percent of original size [2021-06-05 06:56:24,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 06:56:24,291 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:1282, output treesize:291 [2021-06-05 06:56:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:24,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305722243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:24,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:24,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 06:56:24,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868679294] [2021-06-05 06:56:24,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:56:24,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:24,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:56:24,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:56:24,472 INFO L87 Difference]: Start difference. First operand 1783 states and 6019 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:26,325 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 06:56:31,732 WARN L205 SmtUtils]: Spent 5.21 s on a formula simplification. DAG size of input: 209 DAG size of output: 150 [2021-06-05 06:56:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:32,099 INFO L93 Difference]: Finished difference Result 2524 states and 8353 transitions. [2021-06-05 06:56:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:56:32,099 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:32,103 INFO L225 Difference]: With dead ends: 2524 [2021-06-05 06:56:32,103 INFO L226 Difference]: Without dead ends: 2509 [2021-06-05 06:56:32,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 7738.0ms TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:56:32,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-06-05 06:56:32,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1785. [2021-06-05 06:56:32,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.3778026905829597) internal successors, (6026), 1784 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6026 transitions. [2021-06-05 06:56:32,143 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6026 transitions. Word has length 26 [2021-06-05 06:56:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:32,143 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6026 transitions. [2021-06-05 06:56:32,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6026 transitions. [2021-06-05 06:56:32,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:32,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:32,146 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:32,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2311 [2021-06-05 06:56:32,361 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:32,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:32,361 INFO L82 PathProgramCache]: Analyzing trace with hash 597949447, now seen corresponding path program 54 times [2021-06-05 06:56:32,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:32,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957793269] [2021-06-05 06:56:32,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:32,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:32,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957793269] [2021-06-05 06:56:32,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957793269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:32,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21333273] [2021-06-05 06:56:32,728 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 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 [2021-06-05 06:56:32,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:56:32,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:32,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:56:32,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:32,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:32,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,015 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 06:56:33,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 06:56:33,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:33,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2021-06-05 06:56:33,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,071 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:33,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:56:33,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,092 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:33,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 06:56:33,093 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,109 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:33,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 06:56:33,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,126 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:33,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:56:33,127 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,146 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:33,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 06:56:33,146 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,163 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:33,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 06:56:33,163 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,178 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:33,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 06:56:33,180 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,197 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:33,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:56:33,198 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,212 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:33,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:56:33,214 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,228 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:33,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 1 [2021-06-05 06:56:33,229 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,244 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:33,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 06:56:33,244 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,258 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:33,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:56:33,259 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,275 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:33,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 06:56:33,276 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:33,285 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:56:33,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 06:56:33,285 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,315 INFO L628 ElimStorePlain]: treesize reduction 64, result has 29.7 percent of original size [2021-06-05 06:56:33,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,316 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:27 [2021-06-05 06:56:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:33,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21333273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:33,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:33,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-05 06:56:33,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261251799] [2021-06-05 06:56:33,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:56:33,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:33,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:56:33,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:56:33,380 INFO L87 Difference]: Start difference. First operand 1785 states and 6026 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:34,577 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-06-05 06:56:34,948 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2021-06-05 06:56:35,091 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2021-06-05 06:56:35,508 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 06:56:35,812 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-05 06:56:35,985 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 06:56:36,238 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-05 06:56:36,507 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-06-05 06:56:37,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:37,086 INFO L93 Difference]: Finished difference Result 2886 states and 9372 transitions. [2021-06-05 06:56:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:56:37,086 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:37,090 INFO L225 Difference]: With dead ends: 2886 [2021-06-05 06:56:37,090 INFO L226 Difference]: Without dead ends: 2841 [2021-06-05 06:56:37,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 3459.0ms TimeCoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:56:37,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-06-05 06:56:37,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 1790. [2021-06-05 06:56:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1789 states have (on average 3.377864728898826) internal successors, (6043), 1789 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 6043 transitions. [2021-06-05 06:56:37,114 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 6043 transitions. Word has length 26 [2021-06-05 06:56:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:37,114 INFO L482 AbstractCegarLoop]: Abstraction has 1790 states and 6043 transitions. [2021-06-05 06:56:37,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 6043 transitions. [2021-06-05 06:56:37,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:37,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:37,116 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:37,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2377 [2021-06-05 06:56:37,317 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:37,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:37,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1153824785, now seen corresponding path program 33 times [2021-06-05 06:56:37,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:37,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155255231] [2021-06-05 06:56:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:37,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:37,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155255231] [2021-06-05 06:56:37,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155255231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:37,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089076082] [2021-06-05 06:56:37,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:56:37,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:56:37,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:37,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:56:37,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:38,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:38,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:38,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:38,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:38,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:38,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:38,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:56:38,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:38,475 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 06:56:38,475 INFO L628 ElimStorePlain]: treesize reduction 136, result has 57.9 percent of original size [2021-06-05 06:56:38,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:38,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:38,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:38,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:56:38,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:38,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:38,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:38,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:38,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:38,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:38,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:38,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 06:56:38,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:38,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:38,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:38,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:38,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:56:38,624 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:38,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:38,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:56:38,681 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:361, output treesize:72 [2021-06-05 06:56:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:38,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089076082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:38,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:38,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:56:38,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875119295] [2021-06-05 06:56:38,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:56:38,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:38,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:56:38,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:56:38,749 INFO L87 Difference]: Start difference. First operand 1790 states and 6043 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:39,666 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-06-05 06:56:39,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:39,934 INFO L93 Difference]: Finished difference Result 2197 states and 7293 transitions. [2021-06-05 06:56:39,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:56:39,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:39,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:39,937 INFO L225 Difference]: With dead ends: 2197 [2021-06-05 06:56:39,937 INFO L226 Difference]: Without dead ends: 2182 [2021-06-05 06:56:39,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1476.0ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:56:39,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-06-05 06:56:39,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1782. [2021-06-05 06:56:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.381246490735542) internal successors, (6022), 1781 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 6022 transitions. [2021-06-05 06:56:39,957 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 6022 transitions. Word has length 26 [2021-06-05 06:56:39,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:39,957 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 6022 transitions. [2021-06-05 06:56:39,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 6022 transitions. [2021-06-05 06:56:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:39,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:39,959 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:40,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2403 [2021-06-05 06:56:40,174 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:40,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:40,174 INFO L82 PathProgramCache]: Analyzing trace with hash -824665213, now seen corresponding path program 34 times [2021-06-05 06:56:40,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:40,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35352172] [2021-06-05 06:56:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:40,433 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-06-05 06:56:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:40,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:40,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35352172] [2021-06-05 06:56:40,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35352172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:40,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528016102] [2021-06-05 06:56:40,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:40,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:56:40,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:40,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:56:40,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:40,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:40,967 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:40,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 06:56:40,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:40,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:40,977 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:40,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 06:56:40,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:40,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:40,990 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:56:40,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-06-05 06:56:40,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:40,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:41,001 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:41,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 06:56:41,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:41,011 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:41,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 06:56:41,011 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:41,022 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:41,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 06:56:41,022 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:41,031 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:41,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 06:56:41,032 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:41,041 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:41,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 06:56:41,042 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:41,052 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:41,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 1 [2021-06-05 06:56:41,053 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:41,066 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:56:41,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 52 [2021-06-05 06:56:41,067 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:41,076 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:41,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 06:56:41,077 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:41,089 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:56:41,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 60 [2021-06-05 06:56:41,091 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:41,104 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:56:41,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 45 [2021-06-05 06:56:41,105 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:41,115 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:41,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 06:56:41,115 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:41,126 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:41,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 1 [2021-06-05 06:56:41,127 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,135 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 06:56:41,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 60 [2021-06-05 06:56:41,148 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,212 INFO L628 ElimStorePlain]: treesize reduction 47, result has 63.6 percent of original size [2021-06-05 06:56:41,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:56:41,213 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1445, output treesize:46 [2021-06-05 06:56:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:41,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528016102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:41,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:41,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:56:41,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110665859] [2021-06-05 06:56:41,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:56:41,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:41,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:56:41,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:56:41,254 INFO L87 Difference]: Start difference. First operand 1782 states and 6022 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:41,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:41,969 INFO L93 Difference]: Finished difference Result 1968 states and 6539 transitions. [2021-06-05 06:56:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:56:41,970 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:41,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:41,972 INFO L225 Difference]: With dead ends: 1968 [2021-06-05 06:56:41,972 INFO L226 Difference]: Without dead ends: 1953 [2021-06-05 06:56:41,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1135.4ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:56:41,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-05 06:56:41,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1791. [2021-06-05 06:56:41,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.3843575418994414) internal successors, (6058), 1790 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6058 transitions. [2021-06-05 06:56:41,992 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6058 transitions. Word has length 26 [2021-06-05 06:56:41,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:41,992 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6058 transitions. [2021-06-05 06:56:41,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:41,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6058 transitions. [2021-06-05 06:56:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:41,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:41,994 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:42,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2423,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:42,195 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash -992474305, now seen corresponding path program 35 times [2021-06-05 06:56:42,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:42,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679855893] [2021-06-05 06:56:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:42,395 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-06-05 06:56:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:42,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:42,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679855893] [2021-06-05 06:56:42,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679855893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:42,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313868905] [2021-06-05 06:56:42,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:42,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:56:42,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:42,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:56:42,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:43,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:56:43,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:56:43,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:56:43,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:56:43,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:43,116 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:43,122 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:43,127 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 06:56:43,133 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:56:43,139 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:56:43,145 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 06:56:43,152 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:56:43,158 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:43,164 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:56:43,170 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:56:43,175 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:43,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:56:43,179 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,241 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-05 06:56:43,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:56:43,242 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 06:56:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:43,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313868905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:43,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:43,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:56:43,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156408621] [2021-06-05 06:56:43,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:56:43,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:43,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:56:43,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:56:43,290 INFO L87 Difference]: Start difference. First operand 1791 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:43,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:43,716 INFO L93 Difference]: Finished difference Result 2115 states and 7050 transitions. [2021-06-05 06:56:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:56:43,716 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:43,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:43,719 INFO L225 Difference]: With dead ends: 2115 [2021-06-05 06:56:43,719 INFO L226 Difference]: Without dead ends: 2100 [2021-06-05 06:56:43,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 884.1ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:56:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-06-05 06:56:43,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1785. [2021-06-05 06:56:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.383968609865471) internal successors, (6037), 1784 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6037 transitions. [2021-06-05 06:56:43,739 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6037 transitions. Word has length 26 [2021-06-05 06:56:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:43,739 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6037 transitions. [2021-06-05 06:56:43,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6037 transitions. [2021-06-05 06:56:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:43,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:43,741 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:43,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2428,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:43,942 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:43,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:43,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1234976963, now seen corresponding path program 36 times [2021-06-05 06:56:43,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:43,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564641033] [2021-06-05 06:56:43,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:44,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:44,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564641033] [2021-06-05 06:56:44,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564641033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:44,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130569141] [2021-06-05 06:56:44,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:56:44,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:56:44,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:44,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:56:44,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:44,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:44,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:56:44,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,622 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:44,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:56:44,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,631 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:44,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:56:44,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,641 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:44,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:44,642 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,650 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:44,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:56:44,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,662 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:56:44,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 06:56:44,663 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:44,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:56:44,676 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,685 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:44,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:44,686 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,695 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:44,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:56:44,696 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:44,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:56:44,709 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,718 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:44,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:56:44,720 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:44,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:56:44,732 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,741 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:44,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:56:44,742 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,750 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:44,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:44,751 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,759 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:44,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:56:44,760 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:44,767 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:44,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:56:44,767 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:44,888 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-05 06:56:44,888 INFO L628 ElimStorePlain]: treesize reduction 92, result has 50.8 percent of original size [2021-06-05 06:56:44,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:56:44,891 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:88 [2021-06-05 06:56:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:45,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130569141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:45,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:45,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:56:45,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920023686] [2021-06-05 06:56:45,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:56:45,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:45,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:56:45,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:56:45,011 INFO L87 Difference]: Start difference. First operand 1785 states and 6037 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:45,569 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-05 06:56:46,047 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-05 06:56:46,211 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2021-06-05 06:56:46,529 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-05 06:56:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:46,683 INFO L93 Difference]: Finished difference Result 2622 states and 8655 transitions. [2021-06-05 06:56:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:56:46,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:46,687 INFO L225 Difference]: With dead ends: 2622 [2021-06-05 06:56:46,687 INFO L226 Difference]: Without dead ends: 2607 [2021-06-05 06:56:46,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1825.1ms TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:56:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-06-05 06:56:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1782. [2021-06-05 06:56:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.381246490735542) internal successors, (6022), 1781 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 6022 transitions. [2021-06-05 06:56:46,722 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 6022 transitions. Word has length 26 [2021-06-05 06:56:46,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:46,722 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 6022 transitions. [2021-06-05 06:56:46,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:46,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 6022 transitions. [2021-06-05 06:56:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:46,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:46,724 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:46,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2458 [2021-06-05 06:56:46,924 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:46,925 INFO L82 PathProgramCache]: Analyzing trace with hash 649627467, now seen corresponding path program 37 times [2021-06-05 06:56:46,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:46,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279773609] [2021-06-05 06:56:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:47,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:47,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279773609] [2021-06-05 06:56:47,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279773609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:47,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997462622] [2021-06-05 06:56:47,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:47,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:56:47,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:47,577 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-05 06:56:47,647 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:47,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 56 [2021-06-05 06:56:47,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:47,800 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-05 06:56:47,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:47,818 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:56:47,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 49 [2021-06-05 06:56:47,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:47,964 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 06:56:47,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:47,981 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:56:47,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 54 [2021-06-05 06:56:47,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:48,118 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 06:56:48,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:48,137 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:48,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 60 [2021-06-05 06:56:48,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:48,280 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 06:56:48,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:48,300 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:48,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 55 [2021-06-05 06:56:48,303 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:48,429 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 06:56:48,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:48,446 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:48,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 50 [2021-06-05 06:56:48,449 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:48,567 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 06:56:48,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:48,581 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:56:48,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 49 [2021-06-05 06:56:48,582 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:48,693 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 06:56:48,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:48,707 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:48,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 63 [2021-06-05 06:56:48,709 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:48,815 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 06:56:48,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:48,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:56:48,823 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:665, output treesize:244 [2021-06-05 06:56:48,969 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 06:56:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:49,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997462622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:49,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:49,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:56:49,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424888305] [2021-06-05 06:56:49,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:56:49,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:49,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:56:49,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:56:49,047 INFO L87 Difference]: Start difference. First operand 1782 states and 6022 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:49,940 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-05 06:56:50,283 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 06:56:50,723 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2021-06-05 06:56:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:50,884 INFO L93 Difference]: Finished difference Result 2302 states and 7609 transitions. [2021-06-05 06:56:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:56:50,884 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:50,887 INFO L225 Difference]: With dead ends: 2302 [2021-06-05 06:56:50,887 INFO L226 Difference]: Without dead ends: 2287 [2021-06-05 06:56:50,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2251.1ms TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:56:50,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-06-05 06:56:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1774. [2021-06-05 06:56:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.3756345177664975) internal successors, (5985), 1773 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:50,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 5985 transitions. [2021-06-05 06:56:50,908 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 5985 transitions. Word has length 26 [2021-06-05 06:56:50,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:50,908 INFO L482 AbstractCegarLoop]: Abstraction has 1774 states and 5985 transitions. [2021-06-05 06:56:50,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:50,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 5985 transitions. [2021-06-05 06:56:50,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:50,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:50,911 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:51,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2493 [2021-06-05 06:56:51,125 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:51,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:51,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1956490383, now seen corresponding path program 38 times [2021-06-05 06:56:51,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:51,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518363764] [2021-06-05 06:56:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:51,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:51,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518363764] [2021-06-05 06:56:51,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518363764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:51,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420295059] [2021-06-05 06:56:51,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:56:51,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:56:51,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:51,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:56:51,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:51,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,717 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:56:51,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:56:51,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:51,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:56:51,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,740 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:51,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:51,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,750 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:51,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:56:51,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:51,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:56:51,764 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:51,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:56:51,777 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:51,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:56:51,789 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,799 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:51,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:56:51,800 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,808 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:51,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:56:51,809 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,817 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:51,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:56:51,818 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,826 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:51,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:56:51,827 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,835 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:51,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:56:51,837 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,845 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:51,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:56:51,846 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,854 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:51,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:56:51,854 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,863 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:51,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:56:51,863 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:51,869 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:56:51,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:56:51,870 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:51,971 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-06-05 06:56:51,972 INFO L628 ElimStorePlain]: treesize reduction 77, result has 51.0 percent of original size [2021-06-05 06:56:51,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:56:51,973 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 06:56:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:52,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420295059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:52,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:52,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:56:52,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294001324] [2021-06-05 06:56:52,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:56:52,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:52,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:56:52,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:56:52,090 INFO L87 Difference]: Start difference. First operand 1774 states and 5985 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:52,769 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 06:56:52,956 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 06:56:53,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:53,234 INFO L93 Difference]: Finished difference Result 2052 states and 6733 transitions. [2021-06-05 06:56:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:56:53,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:53,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:53,237 INFO L225 Difference]: With dead ends: 2052 [2021-06-05 06:56:53,237 INFO L226 Difference]: Without dead ends: 2031 [2021-06-05 06:56:53,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1307.5ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:56:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-06-05 06:56:53,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1745. [2021-06-05 06:56:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 3.371559633027523) internal successors, (5880), 1744 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 5880 transitions. [2021-06-05 06:56:53,257 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 5880 transitions. Word has length 26 [2021-06-05 06:56:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:53,257 INFO L482 AbstractCegarLoop]: Abstraction has 1745 states and 5880 transitions. [2021-06-05 06:56:53,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 5880 transitions. [2021-06-05 06:56:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:53,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:53,259 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:53,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2506,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:53,474 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:53,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1231193713, now seen corresponding path program 39 times [2021-06-05 06:56:53,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:53,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674061608] [2021-06-05 06:56:53,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:53,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:53,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674061608] [2021-06-05 06:56:53,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674061608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:53,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435149337] [2021-06-05 06:56:53,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:53,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:56:53,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:53,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:56:53,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:54,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:54,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:54,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 06:56:54,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:54,229 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:56:54,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:56:54,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,384 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 06:56:54,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:54,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:54,407 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:56:54,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:56:54,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:54,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:54,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 06:56:54,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,573 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 06:56:54,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:54,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:54,597 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:56:54,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 06:56:54,598 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:54,615 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:56:54,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 23 [2021-06-05 06:56:54,616 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,753 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 06:56:54,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:54,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:54,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:54,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-06-05 06:56:54,773 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:54,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:54,789 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:56:54,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 06:56:54,790 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:55,038 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 06:56:55,038 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.9 percent of original size [2021-06-05 06:56:55,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 06:56:55,060 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:401, output treesize:330 [2021-06-05 06:56:55,223 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 06:56:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:55,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435149337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:55,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:55,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:56:55,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324626120] [2021-06-05 06:56:55,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:56:55,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:55,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:56:55,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:56:55,300 INFO L87 Difference]: Start difference. First operand 1745 states and 5880 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:56,122 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-05 06:56:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:56,334 INFO L93 Difference]: Finished difference Result 1970 states and 6526 transitions. [2021-06-05 06:56:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:56:56,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:56:56,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:56,337 INFO L225 Difference]: With dead ends: 1970 [2021-06-05 06:56:56,337 INFO L226 Difference]: Without dead ends: 1945 [2021-06-05 06:56:56,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1350.9ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:56:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-06-05 06:56:56,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1724. [2021-06-05 06:56:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 3.3743470690655832) internal successors, (5814), 1723 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 5814 transitions. [2021-06-05 06:56:56,356 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 5814 transitions. Word has length 26 [2021-06-05 06:56:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:56,356 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 5814 transitions. [2021-06-05 06:56:56,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 5814 transitions. [2021-06-05 06:56:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:56:56,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:56,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:56,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2518 [2021-06-05 06:56:56,559 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:56,559 INFO L82 PathProgramCache]: Analyzing trace with hash 912205891, now seen corresponding path program 40 times [2021-06-05 06:56:56,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:56,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004476407] [2021-06-05 06:56:56,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:56,836 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 06:56:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:56,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:56,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004476407] [2021-06-05 06:56:56,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004476407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:56,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265222676] [2021-06-05 06:56:56,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:56,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:56:56,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:56,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:56:56,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:57,387 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 06:56:57,460 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:57,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 52 [2021-06-05 06:56:57,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,618 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-05 06:56:57,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:57,635 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:56:57,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 46 [2021-06-05 06:56:57,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,785 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 06:56:57,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:57,802 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:57,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 50 [2021-06-05 06:56:57,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:57,949 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-05 06:56:57,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:57,963 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:56:57,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 48 [2021-06-05 06:56:57,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:58,107 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-05 06:56:58,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:58,121 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:56:58,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 06:56:58,123 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:58,251 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 06:56:58,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:58,267 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:58,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 57 [2021-06-05 06:56:58,269 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:58,388 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 06:56:58,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:58,404 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:58,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 47 [2021-06-05 06:56:58,406 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:58,628 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2021-06-05 06:56:58,629 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.5 percent of original size [2021-06-05 06:56:58,653 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:56:58,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 57 [2021-06-05 06:56:58,654 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:58,759 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 06:56:58,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:58,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:56:58,767 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:641, output treesize:216 [2021-06-05 06:56:58,909 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-06-05 06:56:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:58,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265222676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:58,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:58,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:56:58,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626002246] [2021-06-05 06:56:58,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:56:58,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:58,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:56:58,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:56:58,988 INFO L87 Difference]: Start difference. First operand 1724 states and 5814 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:59,475 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 06:56:59,923 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 06:57:00,365 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 132 [2021-06-05 06:57:00,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:00,547 INFO L93 Difference]: Finished difference Result 2315 states and 7617 transitions. [2021-06-05 06:57:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:57:00,548 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:00,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:00,551 INFO L225 Difference]: With dead ends: 2315 [2021-06-05 06:57:00,551 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 06:57:00,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1995.5ms TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:57:00,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 06:57:00,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1717. [2021-06-05 06:57:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 3.374708624708625) internal successors, (5791), 1716 states have internal predecessors, (5791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:00,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 5791 transitions. [2021-06-05 06:57:00,589 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 5791 transitions. Word has length 26 [2021-06-05 06:57:00,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:00,589 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 5791 transitions. [2021-06-05 06:57:00,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 5791 transitions. [2021-06-05 06:57:00,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:00,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:00,591 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:00,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2570,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:00,791 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:00,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:00,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2073779469, now seen corresponding path program 41 times [2021-06-05 06:57:00,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:00,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927378558] [2021-06-05 06:57:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:01,121 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 06:57:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:01,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:01,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927378558] [2021-06-05 06:57:01,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927378558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:01,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563781863] [2021-06-05 06:57:01,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:57:01,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:57:01,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:01,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:57:01,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:01,758 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 06:57:02,036 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 68 [2021-06-05 06:57:02,098 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_342, v_prenex_343, v_prenex_344], 3=[A]} [2021-06-05 06:57:02,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:02,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:02,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:02,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:57:02,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:02,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:02,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:02,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:57:02,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:02,258 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 06:57:02,259 INFO L628 ElimStorePlain]: treesize reduction 53, result has 81.4 percent of original size [2021-06-05 06:57:02,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:02,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:02,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:57:02,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:02,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:02,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:02,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:02,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:57:02,333 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:02,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:02,403 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:02,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-06-05 06:57:02,404 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:02,413 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 06:57:02,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 52 [2021-06-05 06:57:02,414 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:02,488 INFO L628 ElimStorePlain]: treesize reduction 19, result has 81.4 percent of original size [2021-06-05 06:57:02,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:57:02,491 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:333, output treesize:59 [2021-06-05 06:57:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:02,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563781863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:02,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:02,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:57:02,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648183824] [2021-06-05 06:57:02,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:57:02,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:02,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:57:02,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:57:02,561 INFO L87 Difference]: Start difference. First operand 1717 states and 5791 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:03,444 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 06:57:03,963 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 06:57:04,233 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 84 [2021-06-05 06:57:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:04,390 INFO L93 Difference]: Finished difference Result 2241 states and 7399 transitions. [2021-06-05 06:57:04,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:57:04,390 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:04,394 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 06:57:04,394 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 06:57:04,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2390.2ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:57:04,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 06:57:04,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1703. [2021-06-05 06:57:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.375440658049354) internal successors, (5745), 1702 states have internal predecessors, (5745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5745 transitions. [2021-06-05 06:57:04,414 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5745 transitions. Word has length 26 [2021-06-05 06:57:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:04,414 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5745 transitions. [2021-06-05 06:57:04,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5745 transitions. [2021-06-05 06:57:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:04,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:04,416 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:04,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2588 [2021-06-05 06:57:04,617 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:04,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:04,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1720331193, now seen corresponding path program 42 times [2021-06-05 06:57:04,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:04,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37071737] [2021-06-05 06:57:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:04,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:04,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37071737] [2021-06-05 06:57:04,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37071737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:04,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828800883] [2021-06-05 06:57:04,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:04,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:57:04,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:04,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:04,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:05,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:05,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 06:57:05,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,316 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:57:05,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 1 [2021-06-05 06:57:05,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,336 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:57:05,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:57:05,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,349 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:57:05,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:57:05,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,360 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:57:05,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:57:05,361 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,370 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:57:05,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:57:05,371 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,380 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:57:05,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:57:05,381 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,390 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:57:05,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:57:05,391 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,400 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:57:05,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:57:05,400 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,420 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:57:05,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:57:05,422 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,433 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:57:05,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:57:05,434 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,443 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:57:05,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:57:05,443 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,453 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:57:05,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:57:05,454 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,463 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:57:05,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:57:05,464 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,482 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:57:05,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 06:57:05,484 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,490 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:57:05,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:57:05,491 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,670 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-06-05 06:57:05,670 INFO L628 ElimStorePlain]: treesize reduction 32, result has 81.3 percent of original size [2021-06-05 06:57:05,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:57:05,676 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:157 [2021-06-05 06:57:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:05,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828800883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:05,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:05,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:57:05,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746397306] [2021-06-05 06:57:05,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:57:05,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:05,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:57:05,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:57:05,816 INFO L87 Difference]: Start difference. First operand 1703 states and 5745 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:06,964 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 06:57:07,283 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-06-05 06:57:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:07,350 INFO L93 Difference]: Finished difference Result 2062 states and 6748 transitions. [2021-06-05 06:57:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:57:07,350 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:07,353 INFO L225 Difference]: With dead ends: 2062 [2021-06-05 06:57:07,353 INFO L226 Difference]: Without dead ends: 2032 [2021-06-05 06:57:07,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1636.5ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:57:07,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-06-05 06:57:07,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1752. [2021-06-05 06:57:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.371216447744146) internal successors, (5903), 1751 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5903 transitions. [2021-06-05 06:57:07,372 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5903 transitions. Word has length 26 [2021-06-05 06:57:07,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:07,372 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5903 transitions. [2021-06-05 06:57:07,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:07,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5903 transitions. [2021-06-05 06:57:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:07,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:07,374 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:07,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2597 [2021-06-05 06:57:07,575 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:07,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash 339310983, now seen corresponding path program 43 times [2021-06-05 06:57:07,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:07,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180265751] [2021-06-05 06:57:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:07,910 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2021-06-05 06:57:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:08,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:08,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180265751] [2021-06-05 06:57:08,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180265751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:08,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214442132] [2021-06-05 06:57:08,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:08,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:08,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:08,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,414 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:08,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:57:08,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,425 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:57:08,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 06:57:08,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,436 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:08,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:57:08,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:08,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:57:08,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:08,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:57:08,463 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,472 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:08,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:57:08,472 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:08,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:57:08,485 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,494 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:08,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:57:08,495 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,504 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:08,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:57:08,504 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,514 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:08,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:57:08,515 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,524 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:08,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:57:08,524 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,533 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:08,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:57:08,535 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,543 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:08,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:57:08,544 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,553 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:08,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2021-06-05 06:57:08,554 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,562 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:08,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:57:08,562 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:08,568 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:08,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:57:08,568 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:08,684 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-06-05 06:57:08,684 INFO L628 ElimStorePlain]: treesize reduction 60, result has 61.3 percent of original size [2021-06-05 06:57:08,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:57:08,687 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:88 [2021-06-05 06:57:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:08,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214442132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:08,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:08,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:57:08,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558358878] [2021-06-05 06:57:08,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:57:08,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:08,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:57:08,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:57:08,805 INFO L87 Difference]: Start difference. First operand 1752 states and 5903 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:09,052 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 06:57:09,672 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-05 06:57:09,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:09,846 INFO L93 Difference]: Finished difference Result 2448 states and 8060 transitions. [2021-06-05 06:57:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:57:09,846 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:09,849 INFO L225 Difference]: With dead ends: 2448 [2021-06-05 06:57:09,850 INFO L226 Difference]: Without dead ends: 2433 [2021-06-05 06:57:09,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1430.9ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:57:09,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-06-05 06:57:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1749. [2021-06-05 06:57:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.372425629290618) internal successors, (5895), 1748 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5895 transitions. [2021-06-05 06:57:09,872 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5895 transitions. Word has length 26 [2021-06-05 06:57:09,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:09,872 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 5895 transitions. [2021-06-05 06:57:09,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:09,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5895 transitions. [2021-06-05 06:57:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:09,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:09,874 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:10,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2639,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:10,075 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:10,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:10,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1589366837, now seen corresponding path program 44 times [2021-06-05 06:57:10,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:10,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41306267] [2021-06-05 06:57:10,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:10,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:10,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41306267] [2021-06-05 06:57:10,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41306267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:10,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884163617] [2021-06-05 06:57:10,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:10,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:57:10,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:10,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:57:10,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:10,833 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:57:10,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 53 [2021-06-05 06:57:10,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:10,994 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-05 06:57:10,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:11,021 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:57:11,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2021-06-05 06:57:11,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:11,330 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 159 [2021-06-05 06:57:11,331 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.5 percent of original size [2021-06-05 06:57:11,354 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:57:11,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 59 [2021-06-05 06:57:11,356 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:11,511 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 06:57:11,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:11,534 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:57:11,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 59 [2021-06-05 06:57:11,536 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:11,688 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 06:57:11,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:11,711 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:57:11,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 43 [2021-06-05 06:57:11,712 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:11,864 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 06:57:11,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:11,882 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:57:11,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 49 [2021-06-05 06:57:11,883 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:12,027 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 06:57:12,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:12,044 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:57:12,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 39 [2021-06-05 06:57:12,046 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:12,194 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 06:57:12,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:12,212 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:57:12,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 43 [2021-06-05 06:57:12,216 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:12,348 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 06:57:12,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:12,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:57:12,379 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:625, output treesize:405 [2021-06-05 06:57:12,554 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-06-05 06:57:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:12,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884163617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:12,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:12,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:57:12,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787573740] [2021-06-05 06:57:12,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:57:12,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:12,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:57:12,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:57:12,625 INFO L87 Difference]: Start difference. First operand 1749 states and 5895 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:12,986 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-06-05 06:57:13,167 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2021-06-05 06:57:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:13,506 INFO L93 Difference]: Finished difference Result 2259 states and 7490 transitions. [2021-06-05 06:57:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:57:13,507 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:13,510 INFO L225 Difference]: With dead ends: 2259 [2021-06-05 06:57:13,510 INFO L226 Difference]: Without dead ends: 2244 [2021-06-05 06:57:13,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1393.7ms TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:57:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-06-05 06:57:13,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1752. [2021-06-05 06:57:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.3757852655625356) internal successors, (5911), 1751 states have internal predecessors, (5911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5911 transitions. [2021-06-05 06:57:13,537 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5911 transitions. Word has length 26 [2021-06-05 06:57:13,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:13,538 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5911 transitions. [2021-06-05 06:57:13,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:13,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5911 transitions. [2021-06-05 06:57:13,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:13,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:13,540 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:13,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2672,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:13,740 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:13,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:13,740 INFO L82 PathProgramCache]: Analyzing trace with hash 755189195, now seen corresponding path program 45 times [2021-06-05 06:57:13,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:13,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880473784] [2021-06-05 06:57:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:14,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:14,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880473784] [2021-06-05 06:57:14,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880473784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:14,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231577058] [2021-06-05 06:57:14,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:14,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:57:14,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:14,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:57:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:14,580 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:57:14,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2021-06-05 06:57:14,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:15,015 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 184 [2021-06-05 06:57:15,015 INFO L628 ElimStorePlain]: treesize reduction 60, result has 91.1 percent of original size [2021-06-05 06:57:15,040 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:57:15,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2021-06-05 06:57:15,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:15,250 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2021-06-05 06:57:15,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:15,273 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:57:15,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2021-06-05 06:57:15,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:15,486 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-05 06:57:15,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:15,513 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:57:15,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2021-06-05 06:57:15,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:15,946 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 161 [2021-06-05 06:57:15,947 INFO L628 ElimStorePlain]: treesize reduction 13, result has 97.7 percent of original size [2021-06-05 06:57:15,975 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:57:15,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 06:57:15,980 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,364 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 147 [2021-06-05 06:57:16,365 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.5 percent of original size [2021-06-05 06:57:16,388 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:57:16,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 51 [2021-06-05 06:57:16,391 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,775 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 135 [2021-06-05 06:57:16,776 INFO L628 ElimStorePlain]: treesize reduction 4, result has 99.2 percent of original size [2021-06-05 06:57:16,797 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:57:16,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2021-06-05 06:57:16,801 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:16,981 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 06:57:16,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:16,999 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:57:17,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 47 [2021-06-05 06:57:17,001 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:17,162 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 06:57:17,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:17,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:57:17,189 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:673, output treesize:432 [2021-06-05 06:57:17,423 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-06-05 06:57:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:17,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231577058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:17,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:17,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 06:57:17,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852607357] [2021-06-05 06:57:17,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:57:17,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:17,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:57:17,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:57:17,504 INFO L87 Difference]: Start difference. First operand 1752 states and 5911 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:17,984 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-05 06:57:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:18,461 INFO L93 Difference]: Finished difference Result 2323 states and 7689 transitions. [2021-06-05 06:57:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:57:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:18,464 INFO L225 Difference]: With dead ends: 2323 [2021-06-05 06:57:18,464 INFO L226 Difference]: Without dead ends: 2308 [2021-06-05 06:57:18,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1434.7ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:57:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-06-05 06:57:18,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1770. [2021-06-05 06:57:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 3.3719615602035047) internal successors, (5965), 1769 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 5965 transitions. [2021-06-05 06:57:18,486 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 5965 transitions. Word has length 26 [2021-06-05 06:57:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:18,486 INFO L482 AbstractCegarLoop]: Abstraction has 1770 states and 5965 transitions. [2021-06-05 06:57:18,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 5965 transitions. [2021-06-05 06:57:18,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:18,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:18,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:18,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2702 [2021-06-05 06:57:18,701 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:18,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1554530479, now seen corresponding path program 46 times [2021-06-05 06:57:18,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:18,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581775033] [2021-06-05 06:57:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:19,029 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-05 06:57:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:19,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:19,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581775033] [2021-06-05 06:57:19,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581775033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:19,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154094445] [2021-06-05 06:57:19,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:19,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:57:19,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:19,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:19,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:19,635 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 06:57:19,836 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 65 [2021-06-05 06:57:19,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:19,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:19,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:19,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:57:19,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:19,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:19,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:19,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 06:57:19,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:20,026 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 06:57:20,026 INFO L628 ElimStorePlain]: treesize reduction 73, result has 65.9 percent of original size [2021-06-05 06:57:20,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:20,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:20,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:57:20,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:20,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:20,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:20,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:20,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:57:20,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:20,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:20,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:20,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:20,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 06:57:20,116 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:20,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:20,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:57:20,150 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:61 [2021-06-05 06:57:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:20,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154094445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:20,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:20,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:57:20,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066182982] [2021-06-05 06:57:20,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:57:20,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:20,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:57:20,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:57:20,215 INFO L87 Difference]: Start difference. First operand 1770 states and 5965 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:20,475 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-05 06:57:21,064 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 06:57:21,316 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2021-06-05 06:57:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:21,434 INFO L93 Difference]: Finished difference Result 2217 states and 7354 transitions. [2021-06-05 06:57:21,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:57:21,434 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:21,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:21,437 INFO L225 Difference]: With dead ends: 2217 [2021-06-05 06:57:21,437 INFO L226 Difference]: Without dead ends: 2202 [2021-06-05 06:57:21,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1834.0ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:57:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-05 06:57:21,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1791. [2021-06-05 06:57:21,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.368715083798883) internal successors, (6030), 1790 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6030 transitions. [2021-06-05 06:57:21,457 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6030 transitions. Word has length 26 [2021-06-05 06:57:21,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:21,457 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6030 transitions. [2021-06-05 06:57:21,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:21,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6030 transitions. [2021-06-05 06:57:21,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:21,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:21,459 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:21,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2741 [2021-06-05 06:57:21,661 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:21,661 INFO L82 PathProgramCache]: Analyzing trace with hash -63002301, now seen corresponding path program 47 times [2021-06-05 06:57:21,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:21,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782670534] [2021-06-05 06:57:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:22,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:22,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782670534] [2021-06-05 06:57:22,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782670534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:22,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945880412] [2021-06-05 06:57:22,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:22,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:57:22,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:22,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:57:22,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:22,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,280 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:57:22,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:57:22,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:22,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:57:22,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,301 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:22,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:57:22,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,310 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:22,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:57:22,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:22,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:57:22,324 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:22,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:57:22,337 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:22,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:57:22,350 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,360 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:22,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:57:22,361 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,370 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:22,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:57:22,370 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,379 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:22,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:57:22,380 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,389 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:22,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:57:22,389 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,398 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:22,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:57:22,399 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,408 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:22,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:57:22,409 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,417 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:22,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:57:22,417 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,437 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:22,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:57:22,437 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,442 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:22,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:57:22,443 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,544 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-06-05 06:57:22,544 INFO L628 ElimStorePlain]: treesize reduction 77, result has 51.0 percent of original size [2021-06-05 06:57:22,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:57:22,545 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 06:57:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:22,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945880412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:22,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:22,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:57:22,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864520667] [2021-06-05 06:57:22,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:57:22,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:22,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:57:22,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:57:22,670 INFO L87 Difference]: Start difference. First operand 1791 states and 6030 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:23,026 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 06:57:23,497 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-05 06:57:23,634 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-05 06:57:23,856 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-05 06:57:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:24,180 INFO L93 Difference]: Finished difference Result 2500 states and 8240 transitions. [2021-06-05 06:57:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:57:24,181 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:24,184 INFO L225 Difference]: With dead ends: 2500 [2021-06-05 06:57:24,184 INFO L226 Difference]: Without dead ends: 2485 [2021-06-05 06:57:24,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1668.6ms TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:57:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-06-05 06:57:24,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 1788. [2021-06-05 06:57:24,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.369893676552882) internal successors, (6022), 1787 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6022 transitions. [2021-06-05 06:57:24,206 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6022 transitions. Word has length 26 [2021-06-05 06:57:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:24,207 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 6022 transitions. [2021-06-05 06:57:24,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6022 transitions. [2021-06-05 06:57:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:24,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:24,209 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:24,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2752 [2021-06-05 06:57:24,411 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:24,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:24,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1752945205, now seen corresponding path program 48 times [2021-06-05 06:57:24,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:24,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710989487] [2021-06-05 06:57:24,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:24,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:24,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710989487] [2021-06-05 06:57:24,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710989487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:24,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784690267] [2021-06-05 06:57:24,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:24,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:57:24,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:24,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:57:24,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:25,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,082 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:25,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 06:57:25,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:25,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 34 [2021-06-05 06:57:25,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,114 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:57:25,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2021-06-05 06:57:25,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,126 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:25,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-06-05 06:57:25,127 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,139 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:25,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 06:57:25,139 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,151 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:25,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 06:57:25,151 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,164 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:25,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 06:57:25,165 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,179 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:57:25,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:57:25,181 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,194 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:25,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 06:57:25,195 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,208 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:25,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 06:57:25,208 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,219 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:25,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2021-06-05 06:57:25,220 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,232 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:25,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 06:57:25,232 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:25,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-06-05 06:57:25,248 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:25,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-06-05 06:57:25,263 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,274 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:25,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 06:57:25,274 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:25,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:25,281 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:25,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:57:25,282 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:25,395 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-06-05 06:57:25,396 INFO L628 ElimStorePlain]: treesize reduction 54, result has 61.4 percent of original size [2021-06-05 06:57:25,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:57:25,397 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:86 [2021-06-05 06:57:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:25,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784690267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:25,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:25,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:57:25,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881299250] [2021-06-05 06:57:25,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:57:25,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:25,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:57:25,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:57:25,523 INFO L87 Difference]: Start difference. First operand 1788 states and 6022 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:26,260 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2021-06-05 06:57:26,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:26,639 INFO L93 Difference]: Finished difference Result 2414 states and 7934 transitions. [2021-06-05 06:57:26,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:57:26,639 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:26,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:26,643 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 06:57:26,643 INFO L226 Difference]: Without dead ends: 2368 [2021-06-05 06:57:26,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1312.0ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:57:26,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-06-05 06:57:26,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 1811. [2021-06-05 06:57:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.372375690607735) internal successors, (6104), 1810 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6104 transitions. [2021-06-05 06:57:26,664 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6104 transitions. Word has length 26 [2021-06-05 06:57:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:26,664 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6104 transitions. [2021-06-05 06:57:26,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:26,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6104 transitions. [2021-06-05 06:57:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:26,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:26,666 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:26,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2764,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:26,867 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:26,867 INFO L82 PathProgramCache]: Analyzing trace with hash 731595527, now seen corresponding path program 49 times [2021-06-05 06:57:26,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:26,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936007435] [2021-06-05 06:57:26,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:27,206 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-06-05 06:57:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:27,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:27,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936007435] [2021-06-05 06:57:27,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936007435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:27,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671805398] [2021-06-05 06:57:27,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:27,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:27,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:27,737 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_390, v_prenex_388, v_prenex_389], 3=[A]} [2021-06-05 06:57:27,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:27,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:27,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:57:27,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:27,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:27,764 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:57:27,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:57:27,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:27,922 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 06:57:27,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:27,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:27,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:27,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:57:27,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:27,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:27,946 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:27,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:57:27,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:28,063 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 06:57:28,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:28,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:28,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:28,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:57:28,078 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:28,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:28,088 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:57:28,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 06:57:28,089 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:28,298 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-05 06:57:28,298 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.0 percent of original size [2021-06-05 06:57:28,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:28,315 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 06:57:28,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 45 [2021-06-05 06:57:28,317 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:28,330 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:57:28,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 52 [2021-06-05 06:57:28,331 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:28,494 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-05 06:57:28,495 INFO L628 ElimStorePlain]: treesize reduction 32, result has 85.1 percent of original size [2021-06-05 06:57:28,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 06:57:28,505 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:442, output treesize:160 [2021-06-05 06:57:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:28,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671805398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:28,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:28,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:57:28,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311390290] [2021-06-05 06:57:28,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:57:28,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:28,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:57:28,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:57:28,679 INFO L87 Difference]: Start difference. First operand 1811 states and 6104 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:29,334 INFO L93 Difference]: Finished difference Result 2322 states and 7708 transitions. [2021-06-05 06:57:29,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:57:29,334 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:29,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:29,337 INFO L225 Difference]: With dead ends: 2322 [2021-06-05 06:57:29,337 INFO L226 Difference]: Without dead ends: 2307 [2021-06-05 06:57:29,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1153.6ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:57:29,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-06-05 06:57:29,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1811. [2021-06-05 06:57:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.372375690607735) internal successors, (6104), 1810 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6104 transitions. [2021-06-05 06:57:29,358 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6104 transitions. Word has length 26 [2021-06-05 06:57:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:29,358 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6104 transitions. [2021-06-05 06:57:29,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6104 transitions. [2021-06-05 06:57:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:29,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:29,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:29,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2784 [2021-06-05 06:57:29,561 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:29,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:29,561 INFO L82 PathProgramCache]: Analyzing trace with hash 396904007, now seen corresponding path program 55 times [2021-06-05 06:57:29,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:29,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028023752] [2021-06-05 06:57:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:29,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:29,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028023752] [2021-06-05 06:57:29,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028023752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:29,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708290608] [2021-06-05 06:57:29,933 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 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 [2021-06-05 06:57:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:29,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:29,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:30,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,309 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:30,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 1 [2021-06-05 06:57:30,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,347 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:57:30,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 57 [2021-06-05 06:57:30,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,365 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:30,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 47 [2021-06-05 06:57:30,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,383 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:30,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 06:57:30,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,401 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:30,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 1 [2021-06-05 06:57:30,402 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,418 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:30,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 42 [2021-06-05 06:57:30,419 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,436 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:30,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 1 [2021-06-05 06:57:30,437 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,453 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:30,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 1 [2021-06-05 06:57:30,454 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,470 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:30,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 1 [2021-06-05 06:57:30,471 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,488 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:30,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 1 [2021-06-05 06:57:30,488 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,504 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:30,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-05 06:57:30,505 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,524 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:30,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 06:57:30,525 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,548 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:57:30,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 55 [2021-06-05 06:57:30,550 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,567 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:30,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 06:57:30,568 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,583 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:57:30,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 45 [2021-06-05 06:57:30,585 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:30,590 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:30,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 44 [2021-06-05 06:57:30,591 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:30,630 INFO L628 ElimStorePlain]: treesize reduction 45, result has 47.7 percent of original size [2021-06-05 06:57:30,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:57:30,631 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1653, output treesize:29 [2021-06-05 06:57:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:30,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708290608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:30,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:30,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 06:57:30,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211368513] [2021-06-05 06:57:30,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:57:30,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:30,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:57:30,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:57:30,664 INFO L87 Difference]: Start difference. First operand 1811 states and 6104 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:31,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:31,313 INFO L93 Difference]: Finished difference Result 2373 states and 7573 transitions. [2021-06-05 06:57:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:57:31,313 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:31,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:31,316 INFO L225 Difference]: With dead ends: 2373 [2021-06-05 06:57:31,316 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 06:57:31,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 877.8ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:57:31,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 06:57:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1833. [2021-06-05 06:57:31,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.3717248908296944) internal successors, (6177), 1832 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6177 transitions. [2021-06-05 06:57:31,339 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6177 transitions. Word has length 26 [2021-06-05 06:57:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:31,339 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6177 transitions. [2021-06-05 06:57:31,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:31,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6177 transitions. [2021-06-05 06:57:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:31,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:31,341 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:31,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2813 [2021-06-05 06:57:31,542 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:31,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:31,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1464778571, now seen corresponding path program 56 times [2021-06-05 06:57:31,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:31,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594641034] [2021-06-05 06:57:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:31,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:31,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594641034] [2021-06-05 06:57:31,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594641034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:31,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867185673] [2021-06-05 06:57:31,888 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:57:31,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:57:31,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:31,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:31,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:32,214 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-05 06:57:32,265 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_391, v_prenex_395], 5=[A, v_prenex_393]} [2021-06-05 06:57:32,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:32,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:32,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:32,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:32,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:57:32,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:32,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:32,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:32,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:32,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 12 [2021-06-05 06:57:32,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:32,432 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 06:57:32,433 INFO L628 ElimStorePlain]: treesize reduction 199, result has 46.8 percent of original size [2021-06-05 06:57:32,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:32,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:32,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:57:32,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:32,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:32,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:32,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:32,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:32,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:32,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 24 [2021-06-05 06:57:32,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:32,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:32,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:32,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:32,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:32,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:32,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2021-06-05 06:57:32,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:32,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:32,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:57:32,565 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:445, output treesize:55 [2021-06-05 06:57:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:32,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867185673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:32,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:32,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 06:57:32,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104867114] [2021-06-05 06:57:32,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:57:32,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:32,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:57:32,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:57:32,621 INFO L87 Difference]: Start difference. First operand 1833 states and 6177 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:33,340 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 06:57:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:33,456 INFO L93 Difference]: Finished difference Result 2211 states and 7333 transitions. [2021-06-05 06:57:33,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:57:33,456 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:33,459 INFO L225 Difference]: With dead ends: 2211 [2021-06-05 06:57:33,459 INFO L226 Difference]: Without dead ends: 2180 [2021-06-05 06:57:33,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1007.5ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:57:33,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-06-05 06:57:33,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1833. [2021-06-05 06:57:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.368449781659389) internal successors, (6171), 1832 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6171 transitions. [2021-06-05 06:57:33,479 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6171 transitions. Word has length 26 [2021-06-05 06:57:33,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:33,480 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6171 transitions. [2021-06-05 06:57:33,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:33,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6171 transitions. [2021-06-05 06:57:33,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:33,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:33,482 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:33,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2871 [2021-06-05 06:57:33,682 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:33,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:33,682 INFO L82 PathProgramCache]: Analyzing trace with hash -192487861, now seen corresponding path program 57 times [2021-06-05 06:57:33,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:33,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048685158] [2021-06-05 06:57:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:34,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:34,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048685158] [2021-06-05 06:57:34,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048685158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:34,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459737690] [2021-06-05 06:57:34,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:34,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:57:34,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:34,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:34,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:34,511 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 06:57:34,790 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_408, v_prenex_409], 6=[v_prenex_404, v_prenex_405, A, v_prenex_407, v_prenex_411, v_prenex_413]} [2021-06-05 06:57:34,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,830 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:57:34,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 39 [2021-06-05 06:57:34,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:34,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:34,867 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:57:34,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-06-05 06:57:34,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:35,820 WARN L205 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 221 [2021-06-05 06:57:35,821 INFO L628 ElimStorePlain]: treesize reduction 38, result has 97.9 percent of original size [2021-06-05 06:57:35,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:35,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:35,866 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 06:57:35,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2021-06-05 06:57:35,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:35,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:35,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:35,898 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-06-05 06:57:35,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-05 06:57:35,899 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:36,373 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2021-06-05 06:57:36,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:36,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:36,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:36,441 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-06-05 06:57:36,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 85 [2021-06-05 06:57:36,449 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:36,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:36,479 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-06-05 06:57:36,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 70 [2021-06-05 06:57:36,485 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:36,909 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2021-06-05 06:57:36,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:36,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:36,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:36,948 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 06:57:36,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 73 [2021-06-05 06:57:36,950 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:36,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:36,965 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:36,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 06:57:36,965 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:37,328 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-05 06:57:37,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:37,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:37,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:37,366 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 06:57:37,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 84 [2021-06-05 06:57:37,371 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:37,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:37,395 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 06:57:37,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 65 [2021-06-05 06:57:37,396 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:38,029 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 154 [2021-06-05 06:57:38,030 INFO L628 ElimStorePlain]: treesize reduction 12, result has 98.9 percent of original size [2021-06-05 06:57:38,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:38,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:38,063 INFO L354 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2021-06-05 06:57:38,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 71 [2021-06-05 06:57:38,065 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:38,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:38,100 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:57:38,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 162 treesize of output 96 [2021-06-05 06:57:38,108 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:38,634 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 133 [2021-06-05 06:57:38,634 INFO L628 ElimStorePlain]: treesize reduction 34, result has 96.0 percent of original size [2021-06-05 06:57:38,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:38,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:38,670 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 06:57:38,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 73 [2021-06-05 06:57:38,673 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:38,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:38,684 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:38,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 06:57:38,685 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:38,888 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 06:57:38,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:38,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:38,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:38,922 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 06:57:38,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 78 [2021-06-05 06:57:38,927 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:38,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:38,951 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-06-05 06:57:38,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 167 treesize of output 87 [2021-06-05 06:57:38,955 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:39,270 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-06-05 06:57:39,270 INFO L628 ElimStorePlain]: treesize reduction 66, result has 83.2 percent of original size [2021-06-05 06:57:39,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-05 06:57:39,278 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:1858, output treesize:310 [2021-06-05 06:57:39,442 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-06-05 06:57:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:39,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459737690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:39,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:39,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:57:39,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788369036] [2021-06-05 06:57:39,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:57:39,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:39,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:57:39,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:57:39,489 INFO L87 Difference]: Start difference. First operand 1833 states and 6171 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:40,462 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 06:57:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:40,582 INFO L93 Difference]: Finished difference Result 2363 states and 7827 transitions. [2021-06-05 06:57:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:57:40,583 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:40,586 INFO L225 Difference]: With dead ends: 2363 [2021-06-05 06:57:40,586 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 06:57:40,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1702.7ms TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:57:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 06:57:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1833. [2021-06-05 06:57:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.368449781659389) internal successors, (6171), 1832 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:40,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6171 transitions. [2021-06-05 06:57:40,607 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6171 transitions. Word has length 26 [2021-06-05 06:57:40,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:40,607 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6171 transitions. [2021-06-05 06:57:40,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:40,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6171 transitions. [2021-06-05 06:57:40,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:40,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:40,609 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:40,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2885,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:40,810 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:40,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:40,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1845763381, now seen corresponding path program 50 times [2021-06-05 06:57:40,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:40,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855070354] [2021-06-05 06:57:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:41,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:41,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855070354] [2021-06-05 06:57:41,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855070354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:41,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015901352] [2021-06-05 06:57:41,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:41,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:57:41,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:57:41,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:41,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,522 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:57:41,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:57:41,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:41,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:57:41,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,544 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:41,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:57:41,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,553 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:41,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 06:57:41,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:41,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:57:41,566 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:41,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:57:41,578 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:41,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:57:41,591 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,601 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:41,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:57:41,601 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,610 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:41,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 06:57:41,611 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,621 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:41,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 06:57:41,621 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,630 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:41,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:57:41,631 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,639 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:41,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:57:41,640 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,649 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:41,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:57:41,650 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,658 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:41,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 06:57:41,658 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,667 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:41,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:57:41,668 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:41,673 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:57:41,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:57:41,674 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:41,775 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-06-05 06:57:41,775 INFO L628 ElimStorePlain]: treesize reduction 77, result has 51.0 percent of original size [2021-06-05 06:57:41,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:57:41,776 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 06:57:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:41,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015901352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:41,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:41,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:57:41,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619431746] [2021-06-05 06:57:41,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:57:41,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:41,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:57:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:57:41,895 INFO L87 Difference]: Start difference. First operand 1833 states and 6171 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:42,299 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-05 06:57:42,982 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-06-05 06:57:43,222 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 06:57:43,447 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 06:57:43,630 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-05 06:57:43,912 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2021-06-05 06:57:44,497 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 06:57:44,789 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-06-05 06:57:44,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:44,860 INFO L93 Difference]: Finished difference Result 2484 states and 8143 transitions. [2021-06-05 06:57:44,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:57:44,860 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:44,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:44,863 INFO L225 Difference]: With dead ends: 2484 [2021-06-05 06:57:44,863 INFO L226 Difference]: Without dead ends: 2469 [2021-06-05 06:57:44,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2808.6ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:57:44,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-06-05 06:57:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1840. [2021-06-05 06:57:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.368678629690049) internal successors, (6195), 1839 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:44,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6195 transitions. [2021-06-05 06:57:44,886 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6195 transitions. Word has length 26 [2021-06-05 06:57:44,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:44,886 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 6195 transitions. [2021-06-05 06:57:44,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:44,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6195 transitions. [2021-06-05 06:57:44,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:44,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:44,888 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:45,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2948,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:45,089 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:45,089 INFO L82 PathProgramCache]: Analyzing trace with hash -295381817, now seen corresponding path program 58 times [2021-06-05 06:57:45,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:45,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355350248] [2021-06-05 06:57:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:45,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:45,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355350248] [2021-06-05 06:57:45,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355350248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:45,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635829626] [2021-06-05 06:57:45,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:57:45,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:57:45,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:45,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:57:45,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:45,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 06:57:45,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:45,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 06:57:45,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:45,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 06:57:45,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:45,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 06:57:45,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:45,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:57:45,985 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:45,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 06:57:45,994 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:45,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:45,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:45,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:57:46,002 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:46,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 06:57:46,011 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:46,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 06:57:46,019 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:46,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:57:46,027 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:46,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 06:57:46,035 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:46,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:57:46,043 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:46,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 06:57:46,051 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:46,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 06:57:46,058 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:46,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 06:57:46,066 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:46,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:46,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:46,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 06:57:46,071 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:46,093 INFO L628 ElimStorePlain]: treesize reduction 60, result has 24.1 percent of original size [2021-06-05 06:57:46,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:57:46,094 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:13 [2021-06-05 06:57:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:46,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635829626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:46,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:46,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 06:57:46,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345627202] [2021-06-05 06:57:46,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:57:46,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:46,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:57:46,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:57:46,118 INFO L87 Difference]: Start difference. First operand 1840 states and 6195 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:47,761 INFO L93 Difference]: Finished difference Result 2777 states and 8773 transitions. [2021-06-05 06:57:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:57:47,762 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:47,765 INFO L225 Difference]: With dead ends: 2777 [2021-06-05 06:57:47,765 INFO L226 Difference]: Without dead ends: 2740 [2021-06-05 06:57:47,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1535.0ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:57:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-05 06:57:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1885. [2021-06-05 06:57:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.379511677282378) internal successors, (6367), 1884 states have internal predecessors, (6367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6367 transitions. [2021-06-05 06:57:47,791 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6367 transitions. Word has length 26 [2021-06-05 06:57:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:47,791 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 6367 transitions. [2021-06-05 06:57:47,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:47,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6367 transitions. [2021-06-05 06:57:47,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:47,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:47,793 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:47,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2960 [2021-06-05 06:57:47,995 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:47,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:47,995 INFO L82 PathProgramCache]: Analyzing trace with hash -69388293, now seen corresponding path program 59 times [2021-06-05 06:57:47,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:47,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177117047] [2021-06-05 06:57:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:48,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:48,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177117047] [2021-06-05 06:57:48,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177117047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:48,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129694097] [2021-06-05 06:57:48,200 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 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 [2021-06-05 06:57:48,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:57:48,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:48,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:48,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:48,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-06-05 06:57:48,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 06:57:48,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-06-05 06:57:48,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-06-05 06:57:48,826 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:57:48,836 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-06-05 06:57:48,845 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-06-05 06:57:48,854 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 06:57:48,863 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-06-05 06:57:48,873 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-06-05 06:57:48,882 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 06:57:48,892 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 31 [2021-06-05 06:57:48,910 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-05 06:57:48,921 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2021-06-05 06:57:48,930 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 06:57:48,939 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:48,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:48,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:48,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 06:57:48,945 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:49,022 INFO L628 ElimStorePlain]: treesize reduction 345, result has 12.0 percent of original size [2021-06-05 06:57:49,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:57:49,023 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:41 [2021-06-05 06:57:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:49,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129694097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:49,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:49,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:57:49,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959082425] [2021-06-05 06:57:49,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:57:49,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:49,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:57:49,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:57:49,063 INFO L87 Difference]: Start difference. First operand 1885 states and 6367 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:50,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:50,354 INFO L93 Difference]: Finished difference Result 3099 states and 9931 transitions. [2021-06-05 06:57:50,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:57:50,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:50,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:50,358 INFO L225 Difference]: With dead ends: 3099 [2021-06-05 06:57:50,358 INFO L226 Difference]: Without dead ends: 3069 [2021-06-05 06:57:50,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1325.5ms TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:57:50,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-06-05 06:57:50,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1905. [2021-06-05 06:57:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 3.3891806722689077) internal successors, (6453), 1904 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 6453 transitions. [2021-06-05 06:57:50,387 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 6453 transitions. Word has length 26 [2021-06-05 06:57:50,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:50,388 INFO L482 AbstractCegarLoop]: Abstraction has 1905 states and 6453 transitions. [2021-06-05 06:57:50,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 6453 transitions. [2021-06-05 06:57:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:50,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:50,390 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:50,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3066 [2021-06-05 06:57:50,590 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:50,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1764260359, now seen corresponding path program 60 times [2021-06-05 06:57:50,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:50,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476589249] [2021-06-05 06:57:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:50,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:50,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476589249] [2021-06-05 06:57:50,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476589249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:50,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814820399] [2021-06-05 06:57:50,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:50,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:57:50,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:50,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:57:50,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:51,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,112 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 06:57:51,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 35 [2021-06-05 06:57:51,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:51,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2021-06-05 06:57:51,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,179 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-05 06:57:51,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2021-06-05 06:57:51,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,228 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 06:57:51,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 39 [2021-06-05 06:57:51,232 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,261 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 06:57:51,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 06:57:51,264 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,282 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:51,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 06:57:51,283 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,317 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-05 06:57:51,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 46 [2021-06-05 06:57:51,320 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,337 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:51,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:57:51,339 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,357 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:51,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 06:57:51,358 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,374 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:51,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:57:51,376 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,393 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:51,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 06:57:51,394 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,413 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:51,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 06:57:51,414 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,431 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:51,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 06:57:51,432 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,449 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:51,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 06:57:51,450 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,466 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:57:51,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:57:51,467 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:51,485 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-05 06:57:51,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 35 [2021-06-05 06:57:51,487 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:51,571 INFO L628 ElimStorePlain]: treesize reduction 153, result has 31.4 percent of original size [2021-06-05 06:57:51,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:57:51,572 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:70 [2021-06-05 06:57:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:51,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814820399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:51,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:51,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 06:57:51,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518476650] [2021-06-05 06:57:51,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:57:51,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:51,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:57:51,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:57:51,679 INFO L87 Difference]: Start difference. First operand 1905 states and 6453 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:53,120 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 06:57:53,266 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 06:57:53,664 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-05 06:57:53,846 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 06:57:54,400 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 06:57:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:54,559 INFO L93 Difference]: Finished difference Result 2960 states and 9357 transitions. [2021-06-05 06:57:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:57:54,559 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:54,563 INFO L225 Difference]: With dead ends: 2960 [2021-06-05 06:57:54,563 INFO L226 Difference]: Without dead ends: 2916 [2021-06-05 06:57:54,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2715.7ms TimeCoverageRelationStatistics Valid=496, Invalid=1856, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:57:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2021-06-05 06:57:54,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 1933. [2021-06-05 06:57:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 3.391821946169772) internal successors, (6553), 1932 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:54,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 6553 transitions. [2021-06-05 06:57:54,590 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 6553 transitions. Word has length 26 [2021-06-05 06:57:54,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:54,591 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 6553 transitions. [2021-06-05 06:57:54,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 6553 transitions. [2021-06-05 06:57:54,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:54,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:54,593 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:54,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3164 [2021-06-05 06:57:54,793 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:54,793 INFO L82 PathProgramCache]: Analyzing trace with hash -680204241, now seen corresponding path program 51 times [2021-06-05 06:57:54,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:54,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029223930] [2021-06-05 06:57:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:55,094 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 06:57:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:55,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:55,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029223930] [2021-06-05 06:57:55,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029223930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:55,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307753860] [2021-06-05 06:57:55,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:55,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:57:55,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:55,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:57:55,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:55,842 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 06:57:56,114 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 102 [2021-06-05 06:57:56,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:56,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:56,259 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 06:57:56,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:57:56,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:56,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:56,277 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:57:56,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 46 [2021-06-05 06:57:56,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:56,448 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2021-06-05 06:57:56,449 INFO L628 ElimStorePlain]: treesize reduction 291, result has 43.3 percent of original size [2021-06-05 06:57:56,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:56,459 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:57:56,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 28 [2021-06-05 06:57:56,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:56,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:56,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:56,537 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:57:56,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 06:57:56,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:56,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:56,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:56,609 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 06:57:56,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 06:57:56,610 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:56,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:56,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:56,668 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:57:56,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 28 [2021-06-05 06:57:56,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:56,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:56,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:57:56,716 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 10 variables, input treesize:627, output treesize:83 [2021-06-05 06:57:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:56,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307753860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:56,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:56,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:57:56,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871982198] [2021-06-05 06:57:56,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:57:56,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:56,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:57:56,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:57:56,790 INFO L87 Difference]: Start difference. First operand 1933 states and 6553 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:58,184 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 06:57:58,604 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-05 06:57:58,811 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 06:57:59,424 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 134 [2021-06-05 06:57:59,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:59,603 INFO L93 Difference]: Finished difference Result 2443 states and 8134 transitions. [2021-06-05 06:57:59,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:57:59,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:57:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:59,607 INFO L225 Difference]: With dead ends: 2443 [2021-06-05 06:57:59,607 INFO L226 Difference]: Without dead ends: 2428 [2021-06-05 06:57:59,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3191.1ms TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:57:59,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-06-05 06:57:59,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1948. [2021-06-05 06:57:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.389830508474576) internal successors, (6600), 1947 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6600 transitions. [2021-06-05 06:57:59,629 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6600 transitions. Word has length 26 [2021-06-05 06:57:59,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:59,629 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 6600 transitions. [2021-06-05 06:57:59,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:59,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6600 transitions. [2021-06-05 06:57:59,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:57:59,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:59,631 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:59,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3196 [2021-06-05 06:57:59,832 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:59,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:59,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1997230275, now seen corresponding path program 52 times [2021-06-05 06:57:59,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:59,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314793938] [2021-06-05 06:57:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:00,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:00,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314793938] [2021-06-05 06:58:00,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314793938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:00,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890333954] [2021-06-05 06:58:00,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:00,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:00,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:00,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:58:00,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:00,686 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 06:58:00,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:00,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:00,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:58:00,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:00,878 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-05 06:58:00,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:00,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:00,892 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:58:00,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 06:58:00,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:01,023 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 06:58:01,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:01,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:01,037 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:58:01,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:58:01,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:01,161 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 06:58:01,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:01,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:01,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:01,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:58:01,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:01,307 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 06:58:01,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:01,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:01,319 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:58:01,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:58:01,321 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:01,449 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 06:58:01,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:01,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:01,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:01,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:58:01,463 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:01,578 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 06:58:01,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:01,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:01,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:01,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:58:01,592 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:01,700 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 06:58:01,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:01,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:01,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:01,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:58:01,713 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:01,815 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 06:58:01,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:01,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:58:01,822 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-05 06:58:01,962 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-05 06:58:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:02,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890333954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:02,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:02,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:58:02,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495176129] [2021-06-05 06:58:02,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:58:02,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:02,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:58:02,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:58:02,039 INFO L87 Difference]: Start difference. First operand 1948 states and 6600 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:02,380 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 06:58:03,026 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-06-05 06:58:03,157 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-06-05 06:58:03,471 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-05 06:58:03,808 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 06:58:04,206 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-06-05 06:58:04,498 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-05 06:58:04,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:04,726 INFO L93 Difference]: Finished difference Result 2746 states and 9083 transitions. [2021-06-05 06:58:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:58:04,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:04,730 INFO L225 Difference]: With dead ends: 2746 [2021-06-05 06:58:04,730 INFO L226 Difference]: Without dead ends: 2731 [2021-06-05 06:58:04,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2882.2ms TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:58:04,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2021-06-05 06:58:04,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 1943. [2021-06-05 06:58:04,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1942 states have (on average 3.388774459320288) internal successors, (6581), 1942 states have internal predecessors, (6581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 6581 transitions. [2021-06-05 06:58:04,754 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 6581 transitions. Word has length 26 [2021-06-05 06:58:04,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:04,754 INFO L482 AbstractCegarLoop]: Abstraction has 1943 states and 6581 transitions. [2021-06-05 06:58:04,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:04,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 6581 transitions. [2021-06-05 06:58:04,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:04,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:04,757 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:04,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3215,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:04,957 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:04,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:04,957 INFO L82 PathProgramCache]: Analyzing trace with hash 307287371, now seen corresponding path program 53 times [2021-06-05 06:58:04,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:04,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346227872] [2021-06-05 06:58:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:05,285 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-05 06:58:05,472 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 06:58:05,619 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-06-05 06:58:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:05,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:05,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346227872] [2021-06-05 06:58:05,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346227872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:05,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478446804] [2021-06-05 06:58:05,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:05,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:58:05,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:05,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:05,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:06,244 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 06:58:06,336 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_446], 3=[v_prenex_445, v_prenex_447], 6=[A]} [2021-06-05 06:58:06,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:06,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:58:06,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:06,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,363 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 06:58:06,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 06:58:06,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:06,681 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-06-05 06:58:06,681 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.4 percent of original size [2021-06-05 06:58:06,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:06,699 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 06:58:06,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 42 [2021-06-05 06:58:06,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:06,715 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 06:58:06,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 49 [2021-06-05 06:58:06,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:07,026 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-06-05 06:58:07,027 INFO L628 ElimStorePlain]: treesize reduction 36, result has 91.4 percent of original size [2021-06-05 06:58:07,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:07,047 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:58:07,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 06:58:07,050 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:07,063 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 06:58:07,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2021-06-05 06:58:07,065 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:07,181 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 06:58:07,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:07,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:07,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:07,219 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-06-05 06:58:07,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 79 treesize of output 59 [2021-06-05 06:58:07,221 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:07,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:07,229 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 06:58:07,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 1 [2021-06-05 06:58:07,230 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:07,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:07,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 06:58:07,321 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:518, output treesize:190 [2021-06-05 06:58:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:07,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478446804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:07,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:07,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:58:07,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145543831] [2021-06-05 06:58:07,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:58:07,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:07,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:58:07,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:58:07,507 INFO L87 Difference]: Start difference. First operand 1943 states and 6581 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:07,911 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2021-06-05 06:58:08,412 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-05 06:58:08,619 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-06-05 06:58:09,158 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 06:58:09,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:09,581 INFO L93 Difference]: Finished difference Result 2604 states and 8626 transitions. [2021-06-05 06:58:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:58:09,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:09,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:09,585 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 06:58:09,585 INFO L226 Difference]: Without dead ends: 2579 [2021-06-05 06:58:09,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2657.2ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:58:09,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2021-06-05 06:58:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 1939. [2021-06-05 06:58:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.392672858617131) internal successors, (6575), 1938 states have internal predecessors, (6575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:09,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6575 transitions. [2021-06-05 06:58:09,610 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6575 transitions. Word has length 26 [2021-06-05 06:58:09,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:09,610 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 6575 transitions. [2021-06-05 06:58:09,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:09,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6575 transitions. [2021-06-05 06:58:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:09,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:09,613 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:09,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3229 [2021-06-05 06:58:09,813 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:09,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:09,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1089911327, now seen corresponding path program 61 times [2021-06-05 06:58:09,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:09,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54519359] [2021-06-05 06:58:09,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:10,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:10,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54519359] [2021-06-05 06:58:10,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54519359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:10,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295574205] [2021-06-05 06:58:10,134 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 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 [2021-06-05 06:58:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:10,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:58:10,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:10,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,645 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:10,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 114 treesize of output 1 [2021-06-05 06:58:10,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,673 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:58:10,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 63 [2021-06-05 06:58:10,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,692 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:10,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 62 [2021-06-05 06:58:10,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,720 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:58:10,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 65 [2021-06-05 06:58:10,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,741 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:10,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 1 [2021-06-05 06:58:10,742 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,760 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:10,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 126 treesize of output 1 [2021-06-05 06:58:10,761 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,779 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:10,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 167 treesize of output 1 [2021-06-05 06:58:10,779 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,807 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:58:10,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 74 [2021-06-05 06:58:10,809 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,828 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:10,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 1 [2021-06-05 06:58:10,829 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,847 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:10,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 1 [2021-06-05 06:58:10,848 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,865 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:10,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 1 [2021-06-05 06:58:10,866 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,893 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:58:10,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 69 [2021-06-05 06:58:10,894 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,911 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:10,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 1 [2021-06-05 06:58:10,912 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,929 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:10,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 1 [2021-06-05 06:58:10,929 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,944 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:10,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 54 [2021-06-05 06:58:10,946 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:10,952 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:58:10,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 06:58:10,953 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:10,994 INFO L628 ElimStorePlain]: treesize reduction 66, result has 37.1 percent of original size [2021-06-05 06:58:10,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:58:10,995 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:2101, output treesize:27 [2021-06-05 06:58:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:11,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295574205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:11,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:11,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 06:58:11,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844899045] [2021-06-05 06:58:11,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:58:11,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:11,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:58:11,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:58:11,029 INFO L87 Difference]: Start difference. First operand 1939 states and 6575 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:12,516 INFO L93 Difference]: Finished difference Result 2711 states and 8858 transitions. [2021-06-05 06:58:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:58:12,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:12,520 INFO L225 Difference]: With dead ends: 2711 [2021-06-05 06:58:12,520 INFO L226 Difference]: Without dead ends: 2674 [2021-06-05 06:58:12,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1657.3ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:58:12,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2021-06-05 06:58:12,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 1951. [2021-06-05 06:58:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 3.3897435897435897) internal successors, (6610), 1950 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 6610 transitions. [2021-06-05 06:58:12,545 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 6610 transitions. Word has length 26 [2021-06-05 06:58:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:12,545 INFO L482 AbstractCegarLoop]: Abstraction has 1951 states and 6610 transitions. [2021-06-05 06:58:12,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 6610 transitions. [2021-06-05 06:58:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:12,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:12,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:12,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3260,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:12,748 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:12,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:12,748 INFO L82 PathProgramCache]: Analyzing trace with hash -164417461, now seen corresponding path program 62 times [2021-06-05 06:58:12,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:12,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347432849] [2021-06-05 06:58:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:13,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:13,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347432849] [2021-06-05 06:58:13,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347432849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:13,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960267100] [2021-06-05 06:58:13,075 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 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 [2021-06-05 06:58:13,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:13,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:13,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:58:13,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:13,409 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-05 06:58:13,459 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_448, v_prenex_452], 6=[A, v_prenex_450]} [2021-06-05 06:58:13,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:13,477 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 06:58:13,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 41 [2021-06-05 06:58:13,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:13,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:13,487 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 06:58:13,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 06:58:13,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:13,623 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2021-06-05 06:58:13,624 INFO L628 ElimStorePlain]: treesize reduction 303, result has 45.9 percent of original size [2021-06-05 06:58:13,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:13,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:58:13,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:13,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:13,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:13,693 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 06:58:13,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 101 treesize of output 52 [2021-06-05 06:58:13,695 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:13,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:13,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:13,749 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 06:58:13,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 47 [2021-06-05 06:58:13,751 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:13,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:13,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:58:13,786 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:691, output treesize:55 [2021-06-05 06:58:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:13,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960267100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:13,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:13,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:58:13,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516699049] [2021-06-05 06:58:13,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:58:13,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:13,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:58:13,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:58:13,843 INFO L87 Difference]: Start difference. First operand 1951 states and 6610 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:15,404 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 06:58:15,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:15,552 INFO L93 Difference]: Finished difference Result 2506 states and 8326 transitions. [2021-06-05 06:58:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:58:15,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:15,556 INFO L225 Difference]: With dead ends: 2506 [2021-06-05 06:58:15,556 INFO L226 Difference]: Without dead ends: 2491 [2021-06-05 06:58:15,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1913.1ms TimeCoverageRelationStatistics Valid=324, Invalid=1236, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:58:15,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-06-05 06:58:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1951. [2021-06-05 06:58:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 3.3897435897435897) internal successors, (6610), 1950 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 6610 transitions. [2021-06-05 06:58:15,580 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 6610 transitions. Word has length 26 [2021-06-05 06:58:15,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:15,580 INFO L482 AbstractCegarLoop]: Abstraction has 1951 states and 6610 transitions. [2021-06-05 06:58:15,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:15,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 6610 transitions. [2021-06-05 06:58:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:15,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:15,582 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:15,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3318 [2021-06-05 06:58:15,783 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:15,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1406408139, now seen corresponding path program 63 times [2021-06-05 06:58:15,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:15,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172037812] [2021-06-05 06:58:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:16,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:16,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172037812] [2021-06-05 06:58:16,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172037812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:16,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614665687] [2021-06-05 06:58:16,080 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 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 [2021-06-05 06:58:16,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:58:16,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:16,107 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:58:16,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:16,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,397 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 06:58:16,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 49 [2021-06-05 06:58:16,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,430 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-05 06:58:16,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 47 [2021-06-05 06:58:16,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,463 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:16,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 1 [2021-06-05 06:58:16,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,490 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 06:58:16,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 06:58:16,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,508 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:16,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 06:58:16,509 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,539 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 06:58:16,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 49 [2021-06-05 06:58:16,541 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,560 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:16,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-06-05 06:58:16,561 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,588 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 06:58:16,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 47 [2021-06-05 06:58:16,589 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,615 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 06:58:16,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 35 [2021-06-05 06:58:16,617 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,635 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:16,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-06-05 06:58:16,636 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,653 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:16,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:58:16,654 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,674 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:16,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 06:58:16,674 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,693 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:16,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 06:58:16,694 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,712 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:16,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 06:58:16,712 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,727 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:16,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 06:58:16,728 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,739 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:16,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 06:58:16,739 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,873 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-06-05 06:58:16,874 INFO L628 ElimStorePlain]: treesize reduction 148, result has 49.5 percent of original size [2021-06-05 06:58:16,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:58:16,875 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1321, output treesize:145 [2021-06-05 06:58:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:17,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614665687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:17,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:17,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 06:58:17,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389015415] [2021-06-05 06:58:17,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:58:17,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:17,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:58:17,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:58:17,162 INFO L87 Difference]: Start difference. First operand 1951 states and 6610 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:17,855 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-05 06:58:18,508 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-05 06:58:18,641 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-06-05 06:58:18,972 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2021-06-05 06:58:19,570 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 06:58:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:19,923 INFO L93 Difference]: Finished difference Result 2931 states and 9407 transitions. [2021-06-05 06:58:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:58:19,923 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:19,927 INFO L225 Difference]: With dead ends: 2931 [2021-06-05 06:58:19,927 INFO L226 Difference]: Without dead ends: 2858 [2021-06-05 06:58:19,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 2760.4ms TimeCoverageRelationStatistics Valid=461, Invalid=1795, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:58:19,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-06-05 06:58:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2137. [2021-06-05 06:58:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.387172284644195) internal successors, (7235), 2136 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 7235 transitions. [2021-06-05 06:58:19,954 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 7235 transitions. Word has length 26 [2021-06-05 06:58:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:19,954 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 7235 transitions. [2021-06-05 06:58:19,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 7235 transitions. [2021-06-05 06:58:19,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:19,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:19,957 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:20,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3330 [2021-06-05 06:58:20,157 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:20,158 INFO L82 PathProgramCache]: Analyzing trace with hash -958901773, now seen corresponding path program 54 times [2021-06-05 06:58:20,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:20,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936872317] [2021-06-05 06:58:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:20,504 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 06:58:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:20,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:20,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936872317] [2021-06-05 06:58:20,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936872317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:20,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255123145] [2021-06-05 06:58:20,652 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 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 [2021-06-05 06:58:20,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:58:20,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:20,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:58:20,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:21,239 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 06:58:21,485 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 06:58:21,616 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_464, v_prenex_466, v_prenex_468], 3=[A, v_prenex_462, v_prenex_463, v_prenex_465, v_prenex_467]} [2021-06-05 06:58:21,643 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:58:21,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 06:58:21,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:21,821 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 06:58:21,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:21,864 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:58:21,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 06:58:21,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:22,059 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 06:58:22,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:22,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:22,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 06:58:22,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:22,255 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-06-05 06:58:22,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:22,277 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 06:58:22,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 53 [2021-06-05 06:58:22,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:22,462 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-05 06:58:22,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:22,491 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:58:22,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 64 [2021-06-05 06:58:22,501 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:22,664 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-05 06:58:22,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:22,685 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:58:22,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 60 [2021-06-05 06:58:22,687 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:22,849 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 06:58:22,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:22,875 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 06:58:22,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 71 [2021-06-05 06:58:22,877 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:23,038 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 06:58:23,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:23,059 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 06:58:23,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 57 [2021-06-05 06:58:23,061 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:23,220 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 06:58:23,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:23,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:58:23,236 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:606, output treesize:480 [2021-06-05 06:58:23,455 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-06-05 06:58:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:23,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255123145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:23,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:23,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 06:58:23,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258891447] [2021-06-05 06:58:23,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:58:23,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:23,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:58:23,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:58:23,547 INFO L87 Difference]: Start difference. First operand 2137 states and 7235 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:24,218 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-05 06:58:24,358 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 06:58:25,000 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 06:58:25,439 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 84 [2021-06-05 06:58:25,748 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 06:58:26,616 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 103 [2021-06-05 06:58:27,130 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 129 [2021-06-05 06:58:28,111 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 123 [2021-06-05 06:58:28,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:28,590 INFO L93 Difference]: Finished difference Result 2788 states and 9199 transitions. [2021-06-05 06:58:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:58:28,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:28,594 INFO L225 Difference]: With dead ends: 2788 [2021-06-05 06:58:28,594 INFO L226 Difference]: Without dead ends: 2773 [2021-06-05 06:58:28,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 5092.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:58:28,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2021-06-05 06:58:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 2145. [2021-06-05 06:58:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2144 states have (on average 3.3857276119402986) internal successors, (7259), 2144 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 7259 transitions. [2021-06-05 06:58:28,619 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 7259 transitions. Word has length 26 [2021-06-05 06:58:28,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:28,619 INFO L482 AbstractCegarLoop]: Abstraction has 2145 states and 7259 transitions. [2021-06-05 06:58:28,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:28,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 7259 transitions. [2021-06-05 06:58:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:28,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:28,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:28,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:28,822 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:28,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:28,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1718532743, now seen corresponding path program 55 times [2021-06-05 06:58:28,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:28,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472710833] [2021-06-05 06:58:28,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:29,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:29,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472710833] [2021-06-05 06:58:29,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472710833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:29,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578134266] [2021-06-05 06:58:29,273 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 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 [2021-06-05 06:58:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:29,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:58:29,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:29,714 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 06:58:29,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:29,786 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:58:29,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 06:58:29,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:29,918 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 06:58:29,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:29,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:29,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:29,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 06:58:29,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:30,063 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 06:58:30,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:30,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:30,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:30,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 06:58:30,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:30,202 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 06:58:30,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:30,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:30,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:30,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 06:58:30,216 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:30,339 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 06:58:30,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:30,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:30,352 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:58:30,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:58:30,353 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:30,472 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 06:58:30,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:30,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:30,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:30,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 06:58:30,487 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:30,602 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 06:58:30,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:30,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:30,614 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:58:30,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:58:30,615 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:30,727 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 06:58:30,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:30,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:30,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:30,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:58:30,740 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:30,843 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 06:58:30,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:30,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:58:30,850 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-05 06:58:30,977 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-06-05 06:58:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:31,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578134266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:31,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:31,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:58:31,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177646924] [2021-06-05 06:58:31,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:58:31,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:31,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:58:31,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:58:31,052 INFO L87 Difference]: Start difference. First operand 2145 states and 7259 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:31,396 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 06:58:32,244 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 06:58:32,609 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2021-06-05 06:58:33,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:33,071 INFO L93 Difference]: Finished difference Result 2992 states and 9916 transitions. [2021-06-05 06:58:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:58:33,071 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:33,075 INFO L225 Difference]: With dead ends: 2992 [2021-06-05 06:58:33,075 INFO L226 Difference]: Without dead ends: 2977 [2021-06-05 06:58:33,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2344.0ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:33,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2021-06-05 06:58:33,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 2139. [2021-06-05 06:58:33,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 3.3835360149672593) internal successors, (7234), 2138 states have internal predecessors, (7234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:33,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 7234 transitions. [2021-06-05 06:58:33,102 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 7234 transitions. Word has length 26 [2021-06-05 06:58:33,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:33,102 INFO L482 AbstractCegarLoop]: Abstraction has 2139 states and 7234 transitions. [2021-06-05 06:58:33,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:33,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 7234 transitions. [2021-06-05 06:58:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:33,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:33,104 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:33,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3376,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:33,304 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:33,305 INFO L82 PathProgramCache]: Analyzing trace with hash 28589839, now seen corresponding path program 56 times [2021-06-05 06:58:33,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:33,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938480277] [2021-06-05 06:58:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:33,667 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 06:58:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:33,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:33,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938480277] [2021-06-05 06:58:33,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938480277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:33,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604952479] [2021-06-05 06:58:33,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:58:33,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:33,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:33,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:33,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:34,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,061 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:58:34,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 57 [2021-06-05 06:58:34,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,078 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 06:58:34,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-06-05 06:58:34,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,094 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 06:58:34,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-06-05 06:58:34,095 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,106 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:34,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 06:58:34,106 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,123 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:58:34,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 06:58:34,125 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,140 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 06:58:34,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 53 [2021-06-05 06:58:34,142 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,152 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:34,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 06:58:34,153 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,169 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:58:34,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 50 [2021-06-05 06:58:34,171 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,181 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:34,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 39 [2021-06-05 06:58:34,183 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,192 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:34,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 06:58:34,193 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,203 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:34,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 06:58:34,204 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,214 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:34,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 06:58:34,215 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,224 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:34,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 06:58:34,225 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,235 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:58:34,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 06:58:34,235 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:34,253 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:58:34,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 06:58:34,255 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,260 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-06-05 06:58:34,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 06:58:34,260 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,392 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-06-05 06:58:34,393 INFO L628 ElimStorePlain]: treesize reduction 123, result has 39.4 percent of original size [2021-06-05 06:58:34,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:58:34,394 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1445, output treesize:80 [2021-06-05 06:58:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:34,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604952479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:34,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:34,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:58:34,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202875221] [2021-06-05 06:58:34,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:58:34,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:34,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:58:34,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:58:34,520 INFO L87 Difference]: Start difference. First operand 2139 states and 7234 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:34,788 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 06:58:35,417 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-05 06:58:35,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:35,881 INFO L93 Difference]: Finished difference Result 2826 states and 9360 transitions. [2021-06-05 06:58:35,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:58:35,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:35,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:35,885 INFO L225 Difference]: With dead ends: 2826 [2021-06-05 06:58:35,886 INFO L226 Difference]: Without dead ends: 2801 [2021-06-05 06:58:35,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1683.9ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:58:35,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-06-05 06:58:35,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2126. [2021-06-05 06:58:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.3835294117647057) internal successors, (7190), 2125 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7190 transitions. [2021-06-05 06:58:35,912 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7190 transitions. Word has length 26 [2021-06-05 06:58:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:35,912 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7190 transitions. [2021-06-05 06:58:35,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7190 transitions. [2021-06-05 06:58:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:35,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:35,915 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:36,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3390,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:36,119 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:36,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:36,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1781836725, now seen corresponding path program 57 times [2021-06-05 06:58:36,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:36,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845842359] [2021-06-05 06:58:36,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:36,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:36,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845842359] [2021-06-05 06:58:36,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845842359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:36,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789973737] [2021-06-05 06:58:36,538 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 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 [2021-06-05 06:58:36,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:58:36,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:36,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:36,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:36,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:36,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:36,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:36,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 06:58:36,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:36,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:36,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:36,957 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:58:36,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2021-06-05 06:58:36,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:37,297 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-06-05 06:58:37,298 INFO L628 ElimStorePlain]: treesize reduction 12, result has 97.7 percent of original size [2021-06-05 06:58:37,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:37,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:37,313 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:58:37,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2021-06-05 06:58:37,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:37,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:37,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:37,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:37,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 41 [2021-06-05 06:58:37,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:37,601 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-06-05 06:58:37,601 INFO L628 ElimStorePlain]: treesize reduction 32, result has 92.9 percent of original size [2021-06-05 06:58:37,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:37,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:37,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:37,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 56 [2021-06-05 06:58:37,617 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:37,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:37,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:37,627 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:58:37,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 1 [2021-06-05 06:58:37,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:37,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:37,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:37,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:37,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:37,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 41 [2021-06-05 06:58:37,742 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:37,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:37,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:37,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:37,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-06-05 06:58:37,754 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:37,997 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 06:58:37,997 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.5 percent of original size [2021-06-05 06:58:38,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 06:58:38,003 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:559, output treesize:189 [2021-06-05 06:58:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:38,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789973737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:38,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:38,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:58:38,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287940367] [2021-06-05 06:58:38,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:58:38,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:38,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:58:38,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:58:38,179 INFO L87 Difference]: Start difference. First operand 2126 states and 7190 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:39,239 INFO L93 Difference]: Finished difference Result 2742 states and 9142 transitions. [2021-06-05 06:58:39,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:58:39,239 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:39,243 INFO L225 Difference]: With dead ends: 2742 [2021-06-05 06:58:39,243 INFO L226 Difference]: Without dead ends: 2727 [2021-06-05 06:58:39,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1251.9ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:58:39,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-06-05 06:58:39,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2126. [2021-06-05 06:58:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.3835294117647057) internal successors, (7190), 2125 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:39,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7190 transitions. [2021-06-05 06:58:39,268 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7190 transitions. Word has length 26 [2021-06-05 06:58:39,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:39,268 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7190 transitions. [2021-06-05 06:58:39,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:39,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7190 transitions. [2021-06-05 06:58:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:39,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:39,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:39,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3398,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:39,471 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:39,471 INFO L82 PathProgramCache]: Analyzing trace with hash -529489601, now seen corresponding path program 64 times [2021-06-05 06:58:39,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:39,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445577666] [2021-06-05 06:58:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:39,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:39,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445577666] [2021-06-05 06:58:39,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445577666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:39,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839453855] [2021-06-05 06:58:39,802 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 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 [2021-06-05 06:58:39,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:39,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:39,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:58:39,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:40,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,247 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:40,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 06:58:40,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,264 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:40,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 1 [2021-06-05 06:58:40,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,289 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:58:40,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 50 [2021-06-05 06:58:40,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,306 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:40,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 42 [2021-06-05 06:58:40,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,325 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:40,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 06:58:40,325 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,350 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 06:58:40,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 57 [2021-06-05 06:58:40,351 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,368 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:40,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 1 [2021-06-05 06:58:40,368 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,385 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:40,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 1 [2021-06-05 06:58:40,386 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,404 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:40,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 1 [2021-06-05 06:58:40,405 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,421 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:40,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 47 [2021-06-05 06:58:40,422 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,439 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:40,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 45 [2021-06-05 06:58:40,441 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,459 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:40,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 1 [2021-06-05 06:58:40,459 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,476 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:40,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-05 06:58:40,477 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,494 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:40,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 1 [2021-06-05 06:58:40,495 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,510 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 06:58:40,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 06:58:40,511 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:40,525 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 06:58:40,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 119 treesize of output 55 [2021-06-05 06:58:40,527 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,570 INFO L628 ElimStorePlain]: treesize reduction 74, result has 35.7 percent of original size [2021-06-05 06:58:40,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:58:40,572 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1653, output treesize:29 [2021-06-05 06:58:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:40,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839453855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:40,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:40,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:58:40,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948177106] [2021-06-05 06:58:40,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:58:40,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:40,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:58:40,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:58:40,614 INFO L87 Difference]: Start difference. First operand 2126 states and 7190 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:41,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:41,956 INFO L93 Difference]: Finished difference Result 2821 states and 9363 transitions. [2021-06-05 06:58:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:58:41,957 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:41,960 INFO L225 Difference]: With dead ends: 2821 [2021-06-05 06:58:41,960 INFO L226 Difference]: Without dead ends: 2799 [2021-06-05 06:58:41,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1401.6ms TimeCoverageRelationStatistics Valid=289, Invalid=1043, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:58:41,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-06-05 06:58:41,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2120. [2021-06-05 06:58:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.382255781028787) internal successors, (7167), 2119 states have internal predecessors, (7167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7167 transitions. [2021-06-05 06:58:41,988 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7167 transitions. Word has length 26 [2021-06-05 06:58:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:41,988 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7167 transitions. [2021-06-05 06:58:41,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7167 transitions. [2021-06-05 06:58:41,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:41,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:41,990 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:42,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3417 [2021-06-05 06:58:42,204 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:42,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:42,204 INFO L82 PathProgramCache]: Analyzing trace with hash -815414513, now seen corresponding path program 65 times [2021-06-05 06:58:42,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:42,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751190560] [2021-06-05 06:58:42,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:42,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:42,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751190560] [2021-06-05 06:58:42,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751190560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:42,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297710692] [2021-06-05 06:58:42,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:58:42,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:58:42,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:42,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:58:42,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:42,885 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 06:58:42,934 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_493], 5=[v_prenex_491, v_prenex_495]} [2021-06-05 06:58:42,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:42,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:42,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:42,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:42,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 06:58:42,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:42,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:42,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:42,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:42,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 06:58:42,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:43,076 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 06:58:43,077 INFO L628 ElimStorePlain]: treesize reduction 195, result has 44.9 percent of original size [2021-06-05 06:58:43,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:43,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 06:58:43,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:43,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:43,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:43,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:43,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2021-06-05 06:58:43,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:43,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:43,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:43,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:43,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:58:43,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 24 [2021-06-05 06:58:43,173 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:43,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:43,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:58:43,208 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:429, output treesize:55 [2021-06-05 06:58:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:43,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297710692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:43,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:43,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:58:43,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182172288] [2021-06-05 06:58:43,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:58:43,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:43,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:58:43,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:58:43,251 INFO L87 Difference]: Start difference. First operand 2120 states and 7167 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:44,555 INFO L93 Difference]: Finished difference Result 2661 states and 8818 transitions. [2021-06-05 06:58:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:58:44,555 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:44,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:44,559 INFO L225 Difference]: With dead ends: 2661 [2021-06-05 06:58:44,559 INFO L226 Difference]: Without dead ends: 2642 [2021-06-05 06:58:44,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1477.8ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:58:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-05 06:58:44,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2120. [2021-06-05 06:58:44,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.381311939594148) internal successors, (7165), 2119 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7165 transitions. [2021-06-05 06:58:44,590 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7165 transitions. Word has length 26 [2021-06-05 06:58:44,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:44,590 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7165 transitions. [2021-06-05 06:58:44,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:44,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7165 transitions. [2021-06-05 06:58:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:44,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:44,593 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:44,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3475,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:44,793 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:44,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:44,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1107808399, now seen corresponding path program 66 times [2021-06-05 06:58:44,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:44,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114058862] [2021-06-05 06:58:44,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:45,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:45,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114058862] [2021-06-05 06:58:45,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114058862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:45,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007098294] [2021-06-05 06:58:45,095 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 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 [2021-06-05 06:58:45,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:58:45,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:45,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:58:45,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:45,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,373 INFO L354 Elim1Store]: treesize reduction 4, result has 87.1 percent of original size [2021-06-05 06:58:45,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 55 [2021-06-05 06:58:45,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,407 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 06:58:45,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 43 [2021-06-05 06:58:45,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,435 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 06:58:45,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 40 [2021-06-05 06:58:45,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,462 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-06-05 06:58:45,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 42 [2021-06-05 06:58:45,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,481 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:45,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 06:58:45,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,501 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:45,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 06:58:45,502 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,537 INFO L354 Elim1Store]: treesize reduction 4, result has 87.1 percent of original size [2021-06-05 06:58:45,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 55 [2021-06-05 06:58:45,540 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,557 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:45,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 06:58:45,559 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,585 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-06-05 06:58:45,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 40 [2021-06-05 06:58:45,587 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,613 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-05 06:58:45,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 42 [2021-06-05 06:58:45,615 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,631 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:45,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 06:58:45,632 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:45,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 71 [2021-06-05 06:58:45,668 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,685 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:45,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-06-05 06:58:45,686 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,704 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:45,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 1 [2021-06-05 06:58:45,704 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,734 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:45,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 06:58:45,735 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:45,745 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 06:58:45,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 06:58:45,746 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,837 INFO L628 ElimStorePlain]: treesize reduction 270, result has 20.6 percent of original size [2021-06-05 06:58:45,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:58:45,838 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1081, output treesize:70 [2021-06-05 06:58:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:45,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007098294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:45,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:45,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 06:58:45,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053426741] [2021-06-05 06:58:45,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:58:45,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:45,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:58:45,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:58:45,943 INFO L87 Difference]: Start difference. First operand 2120 states and 7165 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:47,318 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 06:58:47,466 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-05 06:58:47,779 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-05 06:58:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:48,044 INFO L93 Difference]: Finished difference Result 2604 states and 8571 transitions. [2021-06-05 06:58:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:58:48,045 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:48,048 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 06:58:48,048 INFO L226 Difference]: Without dead ends: 2574 [2021-06-05 06:58:48,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2144.9ms TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:58:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-06-05 06:58:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2120. [2021-06-05 06:58:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.381311939594148) internal successors, (7165), 2119 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7165 transitions. [2021-06-05 06:58:48,072 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7165 transitions. Word has length 26 [2021-06-05 06:58:48,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:48,072 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7165 transitions. [2021-06-05 06:58:48,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:48,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7165 transitions. [2021-06-05 06:58:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:48,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:48,074 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:48,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3489,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:48,275 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1424792101, now seen corresponding path program 58 times [2021-06-05 06:58:48,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:48,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816980287] [2021-06-05 06:58:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:48,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:48,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816980287] [2021-06-05 06:58:48,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816980287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:48,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086049399] [2021-06-05 06:58:48,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:48,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:48,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:48,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:48,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086049399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:48,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:48,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:58:48,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767168206] [2021-06-05 06:58:48,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:48,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:48,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:48,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:48,439 INFO L87 Difference]: Start difference. First operand 2120 states and 7165 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:49,293 INFO L93 Difference]: Finished difference Result 5051 states and 15656 transitions. [2021-06-05 06:58:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:58:49,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:49,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:49,299 INFO L225 Difference]: With dead ends: 5051 [2021-06-05 06:58:49,299 INFO L226 Difference]: Without dead ends: 5051 [2021-06-05 06:58:49,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 516.3ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:58:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-05 06:58:49,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 2317. [2021-06-05 06:58:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 3.435233160621762) internal successors, (7956), 2316 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:49,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7956 transitions. [2021-06-05 06:58:49,339 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7956 transitions. Word has length 28 [2021-06-05 06:58:49,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:49,339 INFO L482 AbstractCegarLoop]: Abstraction has 2317 states and 7956 transitions. [2021-06-05 06:58:49,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:49,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7956 transitions. [2021-06-05 06:58:49,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:49,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:49,342 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:49,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3519 [2021-06-05 06:58:49,557 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash 448473257, now seen corresponding path program 59 times [2021-06-05 06:58:49,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:49,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799313999] [2021-06-05 06:58:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:49,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:49,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799313999] [2021-06-05 06:58:49,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799313999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:49,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131562728] [2021-06-05 06:58:49,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:49,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:58:49,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:49,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:49,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:49,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131562728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:49,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:49,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:58:49,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590077264] [2021-06-05 06:58:49,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:58:49,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:49,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:58:49,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:58:49,721 INFO L87 Difference]: Start difference. First operand 2317 states and 7956 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:50,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:50,876 INFO L93 Difference]: Finished difference Result 6617 states and 20175 transitions. [2021-06-05 06:58:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:58:50,877 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:50,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:50,885 INFO L225 Difference]: With dead ends: 6617 [2021-06-05 06:58:50,885 INFO L226 Difference]: Without dead ends: 6617 [2021-06-05 06:58:50,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 704.2ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:58:50,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-06-05 06:58:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 2331. [2021-06-05 06:58:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.4437768240343347) internal successors, (8024), 2330 states have internal predecessors, (8024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 8024 transitions. [2021-06-05 06:58:50,938 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 8024 transitions. Word has length 28 [2021-06-05 06:58:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:50,938 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 8024 transitions. [2021-06-05 06:58:50,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:50,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 8024 transitions. [2021-06-05 06:58:50,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:50,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:50,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:51,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3520,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:51,145 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:51,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:51,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1977377901, now seen corresponding path program 60 times [2021-06-05 06:58:51,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:51,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046888245] [2021-06-05 06:58:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:51,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:51,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046888245] [2021-06-05 06:58:51,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046888245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:51,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074676721] [2021-06-05 06:58:51,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:51,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:58:51,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:51,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:51,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:51,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074676721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:51,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:51,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:58:51,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344933611] [2021-06-05 06:58:51,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:58:51,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:51,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:58:51,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:58:51,311 INFO L87 Difference]: Start difference. First operand 2331 states and 8024 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:52,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:52,464 INFO L93 Difference]: Finished difference Result 6008 states and 18701 transitions. [2021-06-05 06:58:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 06:58:52,464 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:52,473 INFO L225 Difference]: With dead ends: 6008 [2021-06-05 06:58:52,473 INFO L226 Difference]: Without dead ends: 6008 [2021-06-05 06:58:52,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 687.9ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:58:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6008 states. [2021-06-05 06:58:52,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6008 to 2276. [2021-06-05 06:58:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.418901098901099) internal successors, (7778), 2275 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 7778 transitions. [2021-06-05 06:58:52,519 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 7778 transitions. Word has length 28 [2021-06-05 06:58:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:52,519 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 7778 transitions. [2021-06-05 06:58:52,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 7778 transitions. [2021-06-05 06:58:52,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:52,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:52,522 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:52,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:52,732 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:52,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:52,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1153995099, now seen corresponding path program 61 times [2021-06-05 06:58:52,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:52,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774368507] [2021-06-05 06:58:52,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:52,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:52,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774368507] [2021-06-05 06:58:52,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774368507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:52,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715671991] [2021-06-05 06:58:52,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:52,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:52,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:52,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715671991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:52,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:52,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:58:52,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879781785] [2021-06-05 06:58:52,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:52,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:52,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:52,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:52,893 INFO L87 Difference]: Start difference. First operand 2276 states and 7778 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:53,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:53,878 INFO L93 Difference]: Finished difference Result 5144 states and 15840 transitions. [2021-06-05 06:58:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:58:53,878 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:53,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:53,884 INFO L225 Difference]: With dead ends: 5144 [2021-06-05 06:58:53,885 INFO L226 Difference]: Without dead ends: 5144 [2021-06-05 06:58:53,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 606.1ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:58:53,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2021-06-05 06:58:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 2286. [2021-06-05 06:58:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 3.415317286652079) internal successors, (7804), 2285 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 7804 transitions. [2021-06-05 06:58:53,924 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 7804 transitions. Word has length 28 [2021-06-05 06:58:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:53,924 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 7804 transitions. [2021-06-05 06:58:53,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 7804 transitions. [2021-06-05 06:58:53,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:53,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:53,926 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:54,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3522,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:54,127 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:54,127 INFO L82 PathProgramCache]: Analyzing trace with hash 987823393, now seen corresponding path program 67 times [2021-06-05 06:58:54,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:54,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721256063] [2021-06-05 06:58:54,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:54,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:54,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721256063] [2021-06-05 06:58:54,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721256063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:54,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153520475] [2021-06-05 06:58:54,166 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:54,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:54,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:54,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153520475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:54,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:54,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:58:54,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396386584] [2021-06-05 06:58:54,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:58:54,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:54,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:58:54,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:58:54,275 INFO L87 Difference]: Start difference. First operand 2286 states and 7804 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:54,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:54,800 INFO L93 Difference]: Finished difference Result 4580 states and 14284 transitions. [2021-06-05 06:58:54,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:58:54,800 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:54,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:54,806 INFO L225 Difference]: With dead ends: 4580 [2021-06-05 06:58:54,806 INFO L226 Difference]: Without dead ends: 4580 [2021-06-05 06:58:54,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 297.1ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:58:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4580 states. [2021-06-05 06:58:54,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4580 to 2356. [2021-06-05 06:58:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 3.4) internal successors, (8007), 2355 states have internal predecessors, (8007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:54,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8007 transitions. [2021-06-05 06:58:54,854 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8007 transitions. Word has length 28 [2021-06-05 06:58:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:54,854 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 8007 transitions. [2021-06-05 06:58:54,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8007 transitions. [2021-06-05 06:58:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:54,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:54,857 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:55,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3523,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:55,058 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash 846454761, now seen corresponding path program 62 times [2021-06-05 06:58:55,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:55,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504331784] [2021-06-05 06:58:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:55,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:55,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504331784] [2021-06-05 06:58:55,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504331784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:55,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996044914] [2021-06-05 06:58:55,085 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:55,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:55,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:55,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:58:55,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:55,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996044914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:55,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:55,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:58:55,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341571239] [2021-06-05 06:58:55,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:58:55,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:55,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:58:55,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:58:55,161 INFO L87 Difference]: Start difference. First operand 2356 states and 8007 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 06:58:55,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:55,326 INFO L93 Difference]: Finished difference Result 3884 states and 12614 transitions. [2021-06-05 06:58:55,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:58:55,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 28 [2021-06-05 06:58:55,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:55,331 INFO L225 Difference]: With dead ends: 3884 [2021-06-05 06:58:55,331 INFO L226 Difference]: Without dead ends: 3866 [2021-06-05 06:58:55,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:58:55,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3866 states. [2021-06-05 06:58:55,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3866 to 2736. [2021-06-05 06:58:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2735 states have (on average 3.4661791590493602) internal successors, (9480), 2735 states have internal predecessors, (9480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 9480 transitions. [2021-06-05 06:58:55,367 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 9480 transitions. Word has length 28 [2021-06-05 06:58:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:55,367 INFO L482 AbstractCegarLoop]: Abstraction has 2736 states and 9480 transitions. [2021-06-05 06:58:55,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 06:58:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 9480 transitions. [2021-06-05 06:58:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:55,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:55,370 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:55,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3524,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:55,585 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash 409486053, now seen corresponding path program 63 times [2021-06-05 06:58:55,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:55,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810367926] [2021-06-05 06:58:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:55,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:55,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810367926] [2021-06-05 06:58:55,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810367926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:55,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263940642] [2021-06-05 06:58:55,617 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:55,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:58:55,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:55,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:58:55,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:55,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263940642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:55,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:55,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:58:55,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844231463] [2021-06-05 06:58:55,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:58:55,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:55,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:58:55,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:58:55,715 INFO L87 Difference]: Start difference. First operand 2736 states and 9480 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:56,255 INFO L93 Difference]: Finished difference Result 4561 states and 14499 transitions. [2021-06-05 06:58:56,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:58:56,255 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:56,261 INFO L225 Difference]: With dead ends: 4561 [2021-06-05 06:58:56,261 INFO L226 Difference]: Without dead ends: 4514 [2021-06-05 06:58:56,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:58:56,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2021-06-05 06:58:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 2898. [2021-06-05 06:58:56,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2897 states have (on average 3.486365205384881) internal successors, (10100), 2897 states have internal predecessors, (10100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 10100 transitions. [2021-06-05 06:58:56,319 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 10100 transitions. Word has length 28 [2021-06-05 06:58:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:56,319 INFO L482 AbstractCegarLoop]: Abstraction has 2898 states and 10100 transitions. [2021-06-05 06:58:56,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 10100 transitions. [2021-06-05 06:58:56,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:56,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:56,323 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:56,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3525,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:56,523 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:56,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:56,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1945575529, now seen corresponding path program 64 times [2021-06-05 06:58:56,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:56,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040113352] [2021-06-05 06:58:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:56,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:56,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040113352] [2021-06-05 06:58:56,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040113352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:56,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237328475] [2021-06-05 06:58:56,555 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:56,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:56,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:56,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:58:56,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:56,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237328475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:56,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:56,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:58:56,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289909568] [2021-06-05 06:58:56,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:58:56,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:56,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:58:56,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:58:56,662 INFO L87 Difference]: Start difference. First operand 2898 states and 10100 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:57,318 INFO L93 Difference]: Finished difference Result 4846 states and 15131 transitions. [2021-06-05 06:58:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:58:57,319 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:57,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:57,325 INFO L225 Difference]: With dead ends: 4846 [2021-06-05 06:58:57,325 INFO L226 Difference]: Without dead ends: 4820 [2021-06-05 06:58:57,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:58:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4820 states. [2021-06-05 06:58:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4820 to 2913. [2021-06-05 06:58:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.4903846153846154) internal successors, (10164), 2912 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10164 transitions. [2021-06-05 06:58:57,376 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10164 transitions. Word has length 28 [2021-06-05 06:58:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:57,376 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10164 transitions. [2021-06-05 06:58:57,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:57,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10164 transitions. [2021-06-05 06:58:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:57,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:57,380 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:57,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3526,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:57,581 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:57,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:57,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1676978985, now seen corresponding path program 65 times [2021-06-05 06:58:57,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:57,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649983735] [2021-06-05 06:58:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:57,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:57,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649983735] [2021-06-05 06:58:57,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649983735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:57,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874025377] [2021-06-05 06:58:57,612 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:57,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:58:57,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:57,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:58:57,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:57,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874025377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:57,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:57,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:58:57,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312349146] [2021-06-05 06:58:57,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:58:57,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:57,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:58:57,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:58:57,718 INFO L87 Difference]: Start difference. First operand 2913 states and 10164 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:58,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:58,362 INFO L93 Difference]: Finished difference Result 4838 states and 15131 transitions. [2021-06-05 06:58:58,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:58:58,363 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:58,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:58,369 INFO L225 Difference]: With dead ends: 4838 [2021-06-05 06:58:58,369 INFO L226 Difference]: Without dead ends: 4823 [2021-06-05 06:58:58,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 412.0ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:58:58,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4823 states. [2021-06-05 06:58:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4823 to 2913. [2021-06-05 06:58:58,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.48592032967033) internal successors, (10151), 2912 states have internal predecessors, (10151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10151 transitions. [2021-06-05 06:58:58,417 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10151 transitions. Word has length 28 [2021-06-05 06:58:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:58,417 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10151 transitions. [2021-06-05 06:58:58,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10151 transitions. [2021-06-05 06:58:58,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:58,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:58,420 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:58,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3527 [2021-06-05 06:58:58,621 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:58,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1569189389, now seen corresponding path program 66 times [2021-06-05 06:58:58,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:58,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30103317] [2021-06-05 06:58:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:58,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:58,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30103317] [2021-06-05 06:58:58,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30103317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:58,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131421797] [2021-06-05 06:58:58,654 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:58,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:58:58,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:58,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:58:58,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:58,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131421797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:58,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:58,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:58:58,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494227282] [2021-06-05 06:58:58,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:58:58,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:58,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:58:58,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:58:58,744 INFO L87 Difference]: Start difference. First operand 2913 states and 10151 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 06:58:59,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:59,248 INFO L93 Difference]: Finished difference Result 5599 states and 17892 transitions. [2021-06-05 06:58:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:58:59,248 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 06:58:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:59,256 INFO L225 Difference]: With dead ends: 5599 [2021-06-05 06:58:59,256 INFO L226 Difference]: Without dead ends: 5552 [2021-06-05 06:58:59,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:58:59,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2021-06-05 06:58:59,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 3063. [2021-06-05 06:58:59,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 3.5303723056825604) internal successors, (10810), 3062 states have internal predecessors, (10810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 10810 transitions. [2021-06-05 06:58:59,320 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 10810 transitions. Word has length 28 [2021-06-05 06:58:59,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:59,320 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 10810 transitions. [2021-06-05 06:58:59,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 06:58:59,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 10810 transitions. [2021-06-05 06:58:59,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:59,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:59,324 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:59,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3528 [2021-06-05 06:58:59,524 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:59,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:59,525 INFO L82 PathProgramCache]: Analyzing trace with hash -641999155, now seen corresponding path program 67 times [2021-06-05 06:58:59,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:59,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411118778] [2021-06-05 06:58:59,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:59,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:59,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411118778] [2021-06-05 06:58:59,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411118778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:59,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707192505] [2021-06-05 06:58:59,547 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:59,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:58:59,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:59,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707192505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:59,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:59,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:58:59,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049969914] [2021-06-05 06:58:59,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:58:59,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:59,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:58:59,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:58:59,624 INFO L87 Difference]: Start difference. First operand 3063 states and 10810 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:59,769 INFO L93 Difference]: Finished difference Result 4390 states and 14427 transitions. [2021-06-05 06:58:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:58:59,769 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:58:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:59,775 INFO L225 Difference]: With dead ends: 4390 [2021-06-05 06:58:59,775 INFO L226 Difference]: Without dead ends: 4390 [2021-06-05 06:58:59,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:58:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4390 states. [2021-06-05 06:58:59,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4390 to 2947. [2021-06-05 06:58:59,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2946 states have (on average 3.5020366598778003) internal successors, (10317), 2946 states have internal predecessors, (10317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 10317 transitions. [2021-06-05 06:58:59,816 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 10317 transitions. Word has length 28 [2021-06-05 06:58:59,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:59,816 INFO L482 AbstractCegarLoop]: Abstraction has 2947 states and 10317 transitions. [2021-06-05 06:58:59,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 10317 transitions. [2021-06-05 06:58:59,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:59,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:59,819 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:00,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3529,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:00,020 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:00,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:00,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1988680721, now seen corresponding path program 68 times [2021-06-05 06:59:00,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:00,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259048048] [2021-06-05 06:59:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:00,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:00,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259048048] [2021-06-05 06:59:00,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259048048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:00,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879562969] [2021-06-05 06:59:00,065 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:00,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:00,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:00,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:00,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:00,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879562969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:00,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:00,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:59:00,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157502882] [2021-06-05 06:59:00,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:59:00,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:00,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:59:00,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:59:00,157 INFO L87 Difference]: Start difference. First operand 2947 states and 10317 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:00,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:00,797 INFO L93 Difference]: Finished difference Result 6294 states and 19912 transitions. [2021-06-05 06:59:00,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:59:00,797 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:00,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:00,804 INFO L225 Difference]: With dead ends: 6294 [2021-06-05 06:59:00,804 INFO L226 Difference]: Without dead ends: 6294 [2021-06-05 06:59:00,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 364.4ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:59:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2021-06-05 06:59:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 2965. [2021-06-05 06:59:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 3.5020242914979756) internal successors, (10380), 2964 states have internal predecessors, (10380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 10380 transitions. [2021-06-05 06:59:00,858 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 10380 transitions. Word has length 28 [2021-06-05 06:59:00,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:00,858 INFO L482 AbstractCegarLoop]: Abstraction has 2965 states and 10380 transitions. [2021-06-05 06:59:00,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:00,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 10380 transitions. [2021-06-05 06:59:00,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:00,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:00,861 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:01,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3530,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:01,061 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:01,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:01,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1203766627, now seen corresponding path program 69 times [2021-06-05 06:59:01,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:01,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641295152] [2021-06-05 06:59:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:01,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:01,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641295152] [2021-06-05 06:59:01,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641295152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:01,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358510490] [2021-06-05 06:59:01,094 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:01,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:59:01,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:01,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:01,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:01,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358510490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:01,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:01,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:59:01,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959751418] [2021-06-05 06:59:01,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:59:01,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:01,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:59:01,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:59:01,200 INFO L87 Difference]: Start difference. First operand 2965 states and 10380 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:01,918 INFO L93 Difference]: Finished difference Result 6549 states and 20685 transitions. [2021-06-05 06:59:01,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:59:01,918 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:01,927 INFO L225 Difference]: With dead ends: 6549 [2021-06-05 06:59:01,927 INFO L226 Difference]: Without dead ends: 6549 [2021-06-05 06:59:01,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:59:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6549 states. [2021-06-05 06:59:01,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6549 to 3059. [2021-06-05 06:59:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 3.4947678221059517) internal successors, (10687), 3058 states have internal predecessors, (10687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:02,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 10687 transitions. [2021-06-05 06:59:02,004 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 10687 transitions. Word has length 28 [2021-06-05 06:59:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:02,004 INFO L482 AbstractCegarLoop]: Abstraction has 3059 states and 10687 transitions. [2021-06-05 06:59:02,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 10687 transitions. [2021-06-05 06:59:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:02,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:02,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:02,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:02,208 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:02,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2008178013, now seen corresponding path program 70 times [2021-06-05 06:59:02,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:02,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338186875] [2021-06-05 06:59:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:02,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:02,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338186875] [2021-06-05 06:59:02,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338186875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:02,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097622740] [2021-06-05 06:59:02,239 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:02,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:02,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:02,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:02,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:02,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097622740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:02,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:02,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:59:02,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527318546] [2021-06-05 06:59:02,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:59:02,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:02,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:59:02,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:59:02,326 INFO L87 Difference]: Start difference. First operand 3059 states and 10687 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 06:59:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:02,887 INFO L93 Difference]: Finished difference Result 6709 states and 21196 transitions. [2021-06-05 06:59:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:59:02,888 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 06:59:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:02,896 INFO L225 Difference]: With dead ends: 6709 [2021-06-05 06:59:02,897 INFO L226 Difference]: Without dead ends: 6673 [2021-06-05 06:59:02,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 327.3ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:59:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6673 states. [2021-06-05 06:59:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6673 to 3461. [2021-06-05 06:59:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3461 states, 3460 states have (on average 3.5245664739884393) internal successors, (12195), 3460 states have internal predecessors, (12195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3461 states to 3461 states and 12195 transitions. [2021-06-05 06:59:02,965 INFO L78 Accepts]: Start accepts. Automaton has 3461 states and 12195 transitions. Word has length 28 [2021-06-05 06:59:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:02,965 INFO L482 AbstractCegarLoop]: Abstraction has 3461 states and 12195 transitions. [2021-06-05 06:59:02,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 06:59:02,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3461 states and 12195 transitions. [2021-06-05 06:59:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:02,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:02,969 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:03,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3532 [2021-06-05 06:59:03,169 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:03,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:03,169 INFO L82 PathProgramCache]: Analyzing trace with hash -815711165, now seen corresponding path program 71 times [2021-06-05 06:59:03,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:03,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304460153] [2021-06-05 06:59:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:03,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:03,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304460153] [2021-06-05 06:59:03,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304460153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:03,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981053854] [2021-06-05 06:59:03,200 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:03,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:59:03,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:03,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:03,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981053854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:03,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:03,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:59:03,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699400287] [2021-06-05 06:59:03,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:59:03,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:03,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:59:03,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:59:03,291 INFO L87 Difference]: Start difference. First operand 3461 states and 12195 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 06:59:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:03,867 INFO L93 Difference]: Finished difference Result 6846 states and 21557 transitions. [2021-06-05 06:59:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:59:03,868 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 06:59:03,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:03,877 INFO L225 Difference]: With dead ends: 6846 [2021-06-05 06:59:03,877 INFO L226 Difference]: Without dead ends: 6846 [2021-06-05 06:59:03,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:59:03,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2021-06-05 06:59:03,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 3175. [2021-06-05 06:59:03,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 3.484247006931317) internal successors, (11059), 3174 states have internal predecessors, (11059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:03,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 11059 transitions. [2021-06-05 06:59:03,945 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 11059 transitions. Word has length 28 [2021-06-05 06:59:03,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:03,945 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 11059 transitions. [2021-06-05 06:59:03,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 06:59:03,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 11059 transitions. [2021-06-05 06:59:03,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:03,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:03,949 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:04,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3533,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:04,149 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:04,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:04,149 INFO L82 PathProgramCache]: Analyzing trace with hash -257646883, now seen corresponding path program 72 times [2021-06-05 06:59:04,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:04,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141942429] [2021-06-05 06:59:04,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:04,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:04,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141942429] [2021-06-05 06:59:04,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141942429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:04,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623229645] [2021-06-05 06:59:04,181 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:04,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:59:04,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:04,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:04,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:04,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623229645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:04,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:04,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:59:04,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020447220] [2021-06-05 06:59:04,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:59:04,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:04,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:59:04,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:59:04,270 INFO L87 Difference]: Start difference. First operand 3175 states and 11059 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:04,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:04,945 INFO L93 Difference]: Finished difference Result 6061 states and 19490 transitions. [2021-06-05 06:59:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:59:04,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:04,953 INFO L225 Difference]: With dead ends: 6061 [2021-06-05 06:59:04,953 INFO L226 Difference]: Without dead ends: 6057 [2021-06-05 06:59:04,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 361.5ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:59:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6057 states. [2021-06-05 06:59:04,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6057 to 2935. [2021-06-05 06:59:05,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 3.507498295841854) internal successors, (10291), 2934 states have internal predecessors, (10291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:05,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 10291 transitions. [2021-06-05 06:59:05,007 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 10291 transitions. Word has length 28 [2021-06-05 06:59:05,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:05,007 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 10291 transitions. [2021-06-05 06:59:05,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:05,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 10291 transitions. [2021-06-05 06:59:05,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:05,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:05,010 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:05,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3534,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:05,211 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:05,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:05,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1520596959, now seen corresponding path program 73 times [2021-06-05 06:59:05,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:05,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105000873] [2021-06-05 06:59:05,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:05,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:05,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105000873] [2021-06-05 06:59:05,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105000873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:05,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494847225] [2021-06-05 06:59:05,243 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:05,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:05,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:05,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494847225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:05,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:05,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:59:05,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020718135] [2021-06-05 06:59:05,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:05,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:05,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:05,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:05,354 INFO L87 Difference]: Start difference. First operand 2935 states and 10291 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:06,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:06,346 INFO L93 Difference]: Finished difference Result 9324 states and 30354 transitions. [2021-06-05 06:59:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:59:06,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:06,360 INFO L225 Difference]: With dead ends: 9324 [2021-06-05 06:59:06,360 INFO L226 Difference]: Without dead ends: 9324 [2021-06-05 06:59:06,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 562.7ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:59:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9324 states. [2021-06-05 06:59:06,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9324 to 3117. [2021-06-05 06:59:06,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3116 states have (on average 3.5805519897304237) internal successors, (11157), 3116 states have internal predecessors, (11157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 11157 transitions. [2021-06-05 06:59:06,440 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 11157 transitions. Word has length 28 [2021-06-05 06:59:06,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:06,440 INFO L482 AbstractCegarLoop]: Abstraction has 3117 states and 11157 transitions. [2021-06-05 06:59:06,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 11157 transitions. [2021-06-05 06:59:06,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:06,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:06,444 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:06,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3535,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:06,644 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:06,645 INFO L82 PathProgramCache]: Analyzing trace with hash 8307685, now seen corresponding path program 74 times [2021-06-05 06:59:06,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:06,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241709204] [2021-06-05 06:59:06,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:06,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:06,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241709204] [2021-06-05 06:59:06,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241709204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:06,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408554064] [2021-06-05 06:59:06,681 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:06,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:06,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:06,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:06,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:06,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408554064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:06,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:06,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:59:06,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283940541] [2021-06-05 06:59:06,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:06,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:06,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:06,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:06,804 INFO L87 Difference]: Start difference. First operand 3117 states and 11157 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:07,751 INFO L93 Difference]: Finished difference Result 9147 states and 29872 transitions. [2021-06-05 06:59:07,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:59:07,752 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:07,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:07,766 INFO L225 Difference]: With dead ends: 9147 [2021-06-05 06:59:07,766 INFO L226 Difference]: Without dead ends: 9147 [2021-06-05 06:59:07,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:59:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9147 states. [2021-06-05 06:59:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9147 to 3083. [2021-06-05 06:59:07,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 3082 states have (on average 3.562621674237508) internal successors, (10980), 3082 states have internal predecessors, (10980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:07,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 10980 transitions. [2021-06-05 06:59:07,852 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 10980 transitions. Word has length 28 [2021-06-05 06:59:07,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:07,852 INFO L482 AbstractCegarLoop]: Abstraction has 3083 states and 10980 transitions. [2021-06-05 06:59:07,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:07,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 10980 transitions. [2021-06-05 06:59:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:07,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:07,856 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:08,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3536 [2021-06-05 06:59:08,056 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:08,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:08,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2125990737, now seen corresponding path program 75 times [2021-06-05 06:59:08,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:08,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293977762] [2021-06-05 06:59:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:08,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:08,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293977762] [2021-06-05 06:59:08,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293977762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:08,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666509806] [2021-06-05 06:59:08,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:08,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:59:08,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:08,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:08,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:08,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666509806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:08,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:08,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:59:08,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976628566] [2021-06-05 06:59:08,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:08,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:08,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:08,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:08,193 INFO L87 Difference]: Start difference. First operand 3083 states and 10980 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:09,175 INFO L93 Difference]: Finished difference Result 8583 states and 27105 transitions. [2021-06-05 06:59:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 06:59:09,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:09,188 INFO L225 Difference]: With dead ends: 8583 [2021-06-05 06:59:09,188 INFO L226 Difference]: Without dead ends: 8583 [2021-06-05 06:59:09,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 497.7ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:59:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8583 states. [2021-06-05 06:59:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8583 to 3103. [2021-06-05 06:59:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 3102 states have (on average 3.5660863958736297) internal successors, (11062), 3102 states have internal predecessors, (11062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:09,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 11062 transitions. [2021-06-05 06:59:09,265 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 11062 transitions. Word has length 28 [2021-06-05 06:59:09,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:09,265 INFO L482 AbstractCegarLoop]: Abstraction has 3103 states and 11062 transitions. [2021-06-05 06:59:09,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:09,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 11062 transitions. [2021-06-05 06:59:09,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:09,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:09,269 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:09,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3537 [2021-06-05 06:59:09,481 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:09,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1053673763, now seen corresponding path program 76 times [2021-06-05 06:59:09,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:09,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496964310] [2021-06-05 06:59:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:09,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:09,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496964310] [2021-06-05 06:59:09,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496964310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:09,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227003355] [2021-06-05 06:59:09,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:09,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:09,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:09,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:09,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227003355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:09,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:09,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:59:09,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572095067] [2021-06-05 06:59:09,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:09,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:09,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:09,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:09,611 INFO L87 Difference]: Start difference. First operand 3103 states and 11062 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:10,422 INFO L93 Difference]: Finished difference Result 8084 states and 25895 transitions. [2021-06-05 06:59:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:59:10,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:10,434 INFO L225 Difference]: With dead ends: 8084 [2021-06-05 06:59:10,434 INFO L226 Difference]: Without dead ends: 8076 [2021-06-05 06:59:10,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 445.7ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:59:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-06-05 06:59:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 3085. [2021-06-05 06:59:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.5619325551232164) internal successors, (10985), 3084 states have internal predecessors, (10985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 10985 transitions. [2021-06-05 06:59:10,513 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 10985 transitions. Word has length 28 [2021-06-05 06:59:10,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:10,513 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 10985 transitions. [2021-06-05 06:59:10,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:10,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 10985 transitions. [2021-06-05 06:59:10,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:10,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:10,517 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:10,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3538,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:10,718 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:10,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:10,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1235475809, now seen corresponding path program 77 times [2021-06-05 06:59:10,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:10,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672429741] [2021-06-05 06:59:10,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:10,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:10,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672429741] [2021-06-05 06:59:10,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672429741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:10,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278776415] [2021-06-05 06:59:10,750 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:10,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:59:10,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:10,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:10,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:10,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278776415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:10,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:10,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:59:10,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419550855] [2021-06-05 06:59:10,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:10,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:10,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:10,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:10,860 INFO L87 Difference]: Start difference. First operand 3085 states and 10985 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:11,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:11,780 INFO L93 Difference]: Finished difference Result 8010 states and 25668 transitions. [2021-06-05 06:59:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 06:59:11,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:11,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:11,791 INFO L225 Difference]: With dead ends: 8010 [2021-06-05 06:59:11,792 INFO L226 Difference]: Without dead ends: 8010 [2021-06-05 06:59:11,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 488.2ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:59:11,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8010 states. [2021-06-05 06:59:11,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8010 to 3101. [2021-06-05 06:59:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.5641935483870966) internal successors, (11049), 3100 states have internal predecessors, (11049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:11,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 11049 transitions. [2021-06-05 06:59:11,877 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 11049 transitions. Word has length 28 [2021-06-05 06:59:11,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:11,877 INFO L482 AbstractCegarLoop]: Abstraction has 3101 states and 11049 transitions. [2021-06-05 06:59:11,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:11,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 11049 transitions. [2021-06-05 06:59:11,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:11,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:11,881 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:12,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3539 [2021-06-05 06:59:12,082 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:12,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:12,082 INFO L82 PathProgramCache]: Analyzing trace with hash 180098415, now seen corresponding path program 78 times [2021-06-05 06:59:12,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:12,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281693532] [2021-06-05 06:59:12,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:12,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:12,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281693532] [2021-06-05 06:59:12,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281693532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:12,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915095213] [2021-06-05 06:59:12,117 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:12,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:59:12,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:12,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:12,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:12,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915095213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:12,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:12,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:59:12,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789998715] [2021-06-05 06:59:12,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:12,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:12,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:12,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:12,234 INFO L87 Difference]: Start difference. First operand 3101 states and 11049 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:13,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:13,120 INFO L93 Difference]: Finished difference Result 7678 states and 24884 transitions. [2021-06-05 06:59:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:59:13,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:13,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:13,131 INFO L225 Difference]: With dead ends: 7678 [2021-06-05 06:59:13,132 INFO L226 Difference]: Without dead ends: 7670 [2021-06-05 06:59:13,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 478.7ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:59:13,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7670 states. [2021-06-05 06:59:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7670 to 2858. [2021-06-05 06:59:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2857 states have (on average 3.4816240812040604) internal successors, (9947), 2857 states have internal predecessors, (9947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:13,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 9947 transitions. [2021-06-05 06:59:13,199 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 9947 transitions. Word has length 28 [2021-06-05 06:59:13,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:13,199 INFO L482 AbstractCegarLoop]: Abstraction has 2858 states and 9947 transitions. [2021-06-05 06:59:13,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:13,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 9947 transitions. [2021-06-05 06:59:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:13,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:13,202 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:13,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3540 [2021-06-05 06:59:13,403 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:13,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:13,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1618231897, now seen corresponding path program 79 times [2021-06-05 06:59:13,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:13,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731046497] [2021-06-05 06:59:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:13,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:13,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731046497] [2021-06-05 06:59:13,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731046497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:13,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821838745] [2021-06-05 06:59:13,445 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:13,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:13,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:13,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821838745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:13,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:13,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:59:13,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384703556] [2021-06-05 06:59:13,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:13,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:13,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:13,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:13,571 INFO L87 Difference]: Start difference. First operand 2858 states and 9947 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:14,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:14,363 INFO L93 Difference]: Finished difference Result 5875 states and 18762 transitions. [2021-06-05 06:59:14,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:59:14,363 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:14,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:14,371 INFO L225 Difference]: With dead ends: 5875 [2021-06-05 06:59:14,371 INFO L226 Difference]: Without dead ends: 5875 [2021-06-05 06:59:14,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:59:14,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2021-06-05 06:59:14,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 2870. [2021-06-05 06:59:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2869 states have (on average 3.480306727082607) internal successors, (9985), 2869 states have internal predecessors, (9985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 9985 transitions. [2021-06-05 06:59:14,423 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 9985 transitions. Word has length 28 [2021-06-05 06:59:14,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:14,423 INFO L482 AbstractCegarLoop]: Abstraction has 2870 states and 9985 transitions. [2021-06-05 06:59:14,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:14,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 9985 transitions. [2021-06-05 06:59:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:14,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:14,426 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:14,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3541,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:14,626 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:14,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:14,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1792117207, now seen corresponding path program 80 times [2021-06-05 06:59:14,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:14,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979890976] [2021-06-05 06:59:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:14,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:14,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979890976] [2021-06-05 06:59:14,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979890976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:14,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764536343] [2021-06-05 06:59:14,660 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:14,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:14,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:14,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:14,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764536343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:14,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:14,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:59:14,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460333108] [2021-06-05 06:59:14,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:14,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:14,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:14,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:14,780 INFO L87 Difference]: Start difference. First operand 2870 states and 9985 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:15,805 INFO L93 Difference]: Finished difference Result 6654 states and 20757 transitions. [2021-06-05 06:59:15,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:59:15,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:15,814 INFO L225 Difference]: With dead ends: 6654 [2021-06-05 06:59:15,815 INFO L226 Difference]: Without dead ends: 6654 [2021-06-05 06:59:15,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 631.8ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 06:59:15,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2021-06-05 06:59:15,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 2936. [2021-06-05 06:59:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 3.475979557069847) internal successors, (10202), 2935 states have internal predecessors, (10202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 10202 transitions. [2021-06-05 06:59:15,873 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 10202 transitions. Word has length 28 [2021-06-05 06:59:15,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:15,873 INFO L482 AbstractCegarLoop]: Abstraction has 2936 states and 10202 transitions. [2021-06-05 06:59:15,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:15,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 10202 transitions. [2021-06-05 06:59:15,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:15,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:15,876 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:16,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3542,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:16,077 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1447472695, now seen corresponding path program 81 times [2021-06-05 06:59:16,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:16,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755778126] [2021-06-05 06:59:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:16,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:16,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755778126] [2021-06-05 06:59:16,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755778126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:16,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985115878] [2021-06-05 06:59:16,112 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:16,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:59:16,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:16,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:16,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:16,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985115878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:16,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:16,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:59:16,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025754989] [2021-06-05 06:59:16,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:16,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:16,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:16,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:16,232 INFO L87 Difference]: Start difference. First operand 2936 states and 10202 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:17,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:17,193 INFO L93 Difference]: Finished difference Result 6217 states and 19611 transitions. [2021-06-05 06:59:17,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:59:17,194 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:17,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:17,203 INFO L225 Difference]: With dead ends: 6217 [2021-06-05 06:59:17,203 INFO L226 Difference]: Without dead ends: 6213 [2021-06-05 06:59:17,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 578.9ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:59:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6213 states. [2021-06-05 06:59:17,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6213 to 2862. [2021-06-05 06:59:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.471513456833275) internal successors, (9932), 2861 states have internal predecessors, (9932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 9932 transitions. [2021-06-05 06:59:17,259 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 9932 transitions. Word has length 28 [2021-06-05 06:59:17,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:17,259 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 9932 transitions. [2021-06-05 06:59:17,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 9932 transitions. [2021-06-05 06:59:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:17,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:17,262 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:17,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:17,463 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:17,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:17,463 INFO L82 PathProgramCache]: Analyzing trace with hash 193360559, now seen corresponding path program 68 times [2021-06-05 06:59:17,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:17,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099551461] [2021-06-05 06:59:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:17,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:17,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099551461] [2021-06-05 06:59:17,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099551461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:17,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39448423] [2021-06-05 06:59:17,501 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:17,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:17,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:17,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:17,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:17,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39448423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:17,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:17,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:59:17,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537891812] [2021-06-05 06:59:17,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:17,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:17,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:17,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:17,597 INFO L87 Difference]: Start difference. First operand 2862 states and 9932 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-05 06:59:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:18,115 INFO L93 Difference]: Finished difference Result 5353 states and 17165 transitions. [2021-06-05 06:59:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:59:18,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-05 06:59:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:18,122 INFO L225 Difference]: With dead ends: 5353 [2021-06-05 06:59:18,122 INFO L226 Difference]: Without dead ends: 5353 [2021-06-05 06:59:18,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 303.3ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:59:18,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-06-05 06:59:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 2862. [2021-06-05 06:59:18,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.473610625655365) internal successors, (9938), 2861 states have internal predecessors, (9938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:18,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 9938 transitions. [2021-06-05 06:59:18,166 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 9938 transitions. Word has length 28 [2021-06-05 06:59:18,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:18,166 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 9938 transitions. [2021-06-05 06:59:18,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-05 06:59:18,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 9938 transitions. [2021-06-05 06:59:18,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:18,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:18,169 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:18,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3544 [2021-06-05 06:59:18,370 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:18,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:18,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1418439203, now seen corresponding path program 69 times [2021-06-05 06:59:18,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:18,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016987625] [2021-06-05 06:59:18,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:18,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:18,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016987625] [2021-06-05 06:59:18,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016987625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:18,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085598870] [2021-06-05 06:59:18,411 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:18,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:59:18,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:18,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:18,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:18,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085598870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:18,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:18,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:59:18,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075382020] [2021-06-05 06:59:18,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:18,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:18,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:18,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:18,509 INFO L87 Difference]: Start difference. First operand 2862 states and 9938 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-05 06:59:19,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:19,200 INFO L93 Difference]: Finished difference Result 5672 states and 18078 transitions. [2021-06-05 06:59:19,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:59:19,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-05 06:59:19,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:19,208 INFO L225 Difference]: With dead ends: 5672 [2021-06-05 06:59:19,209 INFO L226 Difference]: Without dead ends: 5672 [2021-06-05 06:59:19,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 408.6ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:59:19,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5672 states. [2021-06-05 06:59:19,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5672 to 2853. [2021-06-05 06:59:19,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 3.473702664796634) internal successors, (9907), 2852 states have internal predecessors, (9907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 9907 transitions. [2021-06-05 06:59:19,259 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 9907 transitions. Word has length 28 [2021-06-05 06:59:19,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:19,259 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 9907 transitions. [2021-06-05 06:59:19,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-05 06:59:19,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 9907 transitions. [2021-06-05 06:59:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:19,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:19,262 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:19,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3545,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:19,463 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:19,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1649978851, now seen corresponding path program 70 times [2021-06-05 06:59:19,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:19,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461577238] [2021-06-05 06:59:19,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:19,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:19,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461577238] [2021-06-05 06:59:19,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461577238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:19,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741807030] [2021-06-05 06:59:19,501 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:19,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:19,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:19,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:19,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:19,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741807030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:19,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:19,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:59:19,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329859009] [2021-06-05 06:59:19,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:19,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:19,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:19,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:19,598 INFO L87 Difference]: Start difference. First operand 2853 states and 9907 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-05 06:59:20,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:20,375 INFO L93 Difference]: Finished difference Result 6160 states and 19384 transitions. [2021-06-05 06:59:20,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 06:59:20,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-05 06:59:20,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:20,383 INFO L225 Difference]: With dead ends: 6160 [2021-06-05 06:59:20,383 INFO L226 Difference]: Without dead ends: 6160 [2021-06-05 06:59:20,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 472.0ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:59:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-06-05 06:59:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 2913. [2021-06-05 06:59:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.4701236263736264) internal successors, (10105), 2912 states have internal predecessors, (10105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10105 transitions. [2021-06-05 06:59:20,436 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10105 transitions. Word has length 28 [2021-06-05 06:59:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:20,436 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10105 transitions. [2021-06-05 06:59:20,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-05 06:59:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10105 transitions. [2021-06-05 06:59:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:20,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:20,439 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:20,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3546 [2021-06-05 06:59:20,639 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:20,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:20,640 INFO L82 PathProgramCache]: Analyzing trace with hash 707808605, now seen corresponding path program 71 times [2021-06-05 06:59:20,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:20,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525621145] [2021-06-05 06:59:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:20,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:20,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525621145] [2021-06-05 06:59:20,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525621145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:20,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659479777] [2021-06-05 06:59:20,671 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:20,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:59:20,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:20,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:20,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:20,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659479777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:20,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:20,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 06:59:20,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873833537] [2021-06-05 06:59:20,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:20,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:20,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:20,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:20,781 INFO L87 Difference]: Start difference. First operand 2913 states and 10105 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:21,272 INFO L93 Difference]: Finished difference Result 6832 states and 22884 transitions. [2021-06-05 06:59:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:59:21,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:21,282 INFO L225 Difference]: With dead ends: 6832 [2021-06-05 06:59:21,282 INFO L226 Difference]: Without dead ends: 6832 [2021-06-05 06:59:21,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:59:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2021-06-05 06:59:21,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 4173. [2021-06-05 06:59:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4172 states have (on average 3.5884467881112174) internal successors, (14971), 4172 states have internal predecessors, (14971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 14971 transitions. [2021-06-05 06:59:21,352 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 14971 transitions. Word has length 28 [2021-06-05 06:59:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:21,352 INFO L482 AbstractCegarLoop]: Abstraction has 4173 states and 14971 transitions. [2021-06-05 06:59:21,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 14971 transitions. [2021-06-05 06:59:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:21,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:21,357 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:21,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3547,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:21,558 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:21,558 INFO L82 PathProgramCache]: Analyzing trace with hash -703859107, now seen corresponding path program 72 times [2021-06-05 06:59:21,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:21,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61229892] [2021-06-05 06:59:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:21,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:21,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61229892] [2021-06-05 06:59:21,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61229892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:21,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852364762] [2021-06-05 06:59:21,595 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:21,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:59:21,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:21,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:21,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:21,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852364762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:21,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:21,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:59:21,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958853697] [2021-06-05 06:59:21,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:21,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:21,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:21,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:21,685 INFO L87 Difference]: Start difference. First operand 4173 states and 14971 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-05 06:59:22,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:22,459 INFO L93 Difference]: Finished difference Result 7512 states and 25338 transitions. [2021-06-05 06:59:22,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:59:22,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-05 06:59:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:22,471 INFO L225 Difference]: With dead ends: 7512 [2021-06-05 06:59:22,471 INFO L226 Difference]: Without dead ends: 7508 [2021-06-05 06:59:22,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 433.7ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:59:22,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7508 states. [2021-06-05 06:59:22,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7508 to 4065. [2021-06-05 06:59:22,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4065 states, 4064 states have (on average 3.597194881889764) internal successors, (14619), 4064 states have internal predecessors, (14619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 14619 transitions. [2021-06-05 06:59:22,547 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 14619 transitions. Word has length 28 [2021-06-05 06:59:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:22,547 INFO L482 AbstractCegarLoop]: Abstraction has 4065 states and 14619 transitions. [2021-06-05 06:59:22,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-05 06:59:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 14619 transitions. [2021-06-05 06:59:22,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:22,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:22,553 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:22,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3548,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:22,753 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:22,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:22,753 INFO L82 PathProgramCache]: Analyzing trace with hash 325457475, now seen corresponding path program 82 times [2021-06-05 06:59:22,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:22,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752856479] [2021-06-05 06:59:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:22,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:22,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752856479] [2021-06-05 06:59:22,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752856479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:22,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658017106] [2021-06-05 06:59:22,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:22,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:22,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:22,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:22,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:22,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658017106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:22,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:22,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 06:59:22,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512232998] [2021-06-05 06:59:22,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:22,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:22,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:22,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:22,880 INFO L87 Difference]: Start difference. First operand 4065 states and 14619 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:23,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:23,689 INFO L93 Difference]: Finished difference Result 8298 states and 27746 transitions. [2021-06-05 06:59:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:59:23,689 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:23,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:23,701 INFO L225 Difference]: With dead ends: 8298 [2021-06-05 06:59:23,701 INFO L226 Difference]: Without dead ends: 8289 [2021-06-05 06:59:23,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 442.5ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:59:23,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-06-05 06:59:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 4502. [2021-06-05 06:59:23,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 3.688735836480782) internal successors, (16603), 4501 states have internal predecessors, (16603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:23,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 16603 transitions. [2021-06-05 06:59:23,789 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 16603 transitions. Word has length 28 [2021-06-05 06:59:23,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:23,789 INFO L482 AbstractCegarLoop]: Abstraction has 4502 states and 16603 transitions. [2021-06-05 06:59:23,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:23,789 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 16603 transitions. [2021-06-05 06:59:23,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:23,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:23,795 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:23,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3549 [2021-06-05 06:59:23,995 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:23,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:23,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1928168421, now seen corresponding path program 83 times [2021-06-05 06:59:23,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:23,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177377751] [2021-06-05 06:59:23,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:24,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:24,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177377751] [2021-06-05 06:59:24,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177377751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:24,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94982440] [2021-06-05 06:59:24,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:24,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:59:24,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:24,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:24,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:24,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94982440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:24,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:24,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 06:59:24,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195835692] [2021-06-05 06:59:24,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:24,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:24,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:24,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:24,137 INFO L87 Difference]: Start difference. First operand 4502 states and 16603 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:24,906 INFO L93 Difference]: Finished difference Result 8567 states and 28576 transitions. [2021-06-05 06:59:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:59:24,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:24,918 INFO L225 Difference]: With dead ends: 8567 [2021-06-05 06:59:24,919 INFO L226 Difference]: Without dead ends: 8567 [2021-06-05 06:59:24,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 443.0ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:59:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8567 states. [2021-06-05 06:59:25,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8567 to 4520. [2021-06-05 06:59:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 3.677362248285019) internal successors, (16618), 4519 states have internal predecessors, (16618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:25,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 16618 transitions. [2021-06-05 06:59:25,024 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 16618 transitions. Word has length 28 [2021-06-05 06:59:25,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:25,024 INFO L482 AbstractCegarLoop]: Abstraction has 4520 states and 16618 transitions. [2021-06-05 06:59:25,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:25,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 16618 transitions. [2021-06-05 06:59:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:25,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:25,030 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:25,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3550,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:25,230 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:25,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:25,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1163392585, now seen corresponding path program 84 times [2021-06-05 06:59:25,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:25,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61996488] [2021-06-05 06:59:25,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:25,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:25,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61996488] [2021-06-05 06:59:25,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61996488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:25,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912378068] [2021-06-05 06:59:25,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:25,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:59:25,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:25,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:25,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912378068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:25,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:25,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:59:25,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342424793] [2021-06-05 06:59:25,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:59:25,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:25,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:59:25,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:59:25,342 INFO L87 Difference]: Start difference. First operand 4520 states and 16618 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:25,725 INFO L93 Difference]: Finished difference Result 8001 states and 28114 transitions. [2021-06-05 06:59:25,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:59:25,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:25,737 INFO L225 Difference]: With dead ends: 8001 [2021-06-05 06:59:25,737 INFO L226 Difference]: Without dead ends: 7918 [2021-06-05 06:59:25,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:59:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7918 states. [2021-06-05 06:59:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7918 to 5964. [2021-06-05 06:59:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5964 states, 5963 states have (on average 3.7450947509642796) internal successors, (22332), 5963 states have internal predecessors, (22332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:25,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 22332 transitions. [2021-06-05 06:59:25,841 INFO L78 Accepts]: Start accepts. Automaton has 5964 states and 22332 transitions. Word has length 28 [2021-06-05 06:59:25,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:25,841 INFO L482 AbstractCegarLoop]: Abstraction has 5964 states and 22332 transitions. [2021-06-05 06:59:25,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:25,841 INFO L276 IsEmpty]: Start isEmpty. Operand 5964 states and 22332 transitions. [2021-06-05 06:59:25,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:25,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:25,849 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:26,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-06-05 06:59:26,050 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:26,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1923559731, now seen corresponding path program 85 times [2021-06-05 06:59:26,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:26,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905762826] [2021-06-05 06:59:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:26,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:26,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905762826] [2021-06-05 06:59:26,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905762826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:26,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512513661] [2021-06-05 06:59:26,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:26,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:59:26,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:26,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512513661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:26,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:26,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 06:59:26,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933497616] [2021-06-05 06:59:26,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:59:26,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:26,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:59:26,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:59:26,155 INFO L87 Difference]: Start difference. First operand 5964 states and 22332 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:26,321 INFO L93 Difference]: Finished difference Result 8265 states and 28982 transitions. [2021-06-05 06:59:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:59:26,321 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:26,335 INFO L225 Difference]: With dead ends: 8265 [2021-06-05 06:59:26,335 INFO L226 Difference]: Without dead ends: 8265 [2021-06-05 06:59:26,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:59:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8265 states. [2021-06-05 06:59:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8265 to 6071. [2021-06-05 06:59:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6071 states, 6070 states have (on average 3.7255354200988466) internal successors, (22614), 6070 states have internal predecessors, (22614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6071 states to 6071 states and 22614 transitions. [2021-06-05 06:59:26,458 INFO L78 Accepts]: Start accepts. Automaton has 6071 states and 22614 transitions. Word has length 28 [2021-06-05 06:59:26,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:26,458 INFO L482 AbstractCegarLoop]: Abstraction has 6071 states and 22614 transitions. [2021-06-05 06:59:26,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:26,458 INFO L276 IsEmpty]: Start isEmpty. Operand 6071 states and 22614 transitions. [2021-06-05 06:59:26,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:26,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:26,466 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:26,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:26,667 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:26,667 INFO L82 PathProgramCache]: Analyzing trace with hash -993359987, now seen corresponding path program 86 times [2021-06-05 06:59:26,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:26,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614719710] [2021-06-05 06:59:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:26,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:26,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614719710] [2021-06-05 06:59:26,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614719710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:26,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183035624] [2021-06-05 06:59:26,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:26,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:26,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:26,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:26,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:26,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183035624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:26,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:26,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 06:59:26,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111437493] [2021-06-05 06:59:26,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:59:26,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:26,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:59:26,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:59:26,788 INFO L87 Difference]: Start difference. First operand 6071 states and 22614 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:27,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:27,450 INFO L93 Difference]: Finished difference Result 12605 states and 43798 transitions. [2021-06-05 06:59:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:59:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:27,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:27,472 INFO L225 Difference]: With dead ends: 12605 [2021-06-05 06:59:27,473 INFO L226 Difference]: Without dead ends: 12605 [2021-06-05 06:59:27,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:59:27,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12605 states. [2021-06-05 06:59:27,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12605 to 6726. [2021-06-05 06:59:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6726 states, 6725 states have (on average 3.7414126394052043) internal successors, (25161), 6725 states have internal predecessors, (25161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6726 states to 6726 states and 25161 transitions. [2021-06-05 06:59:27,657 INFO L78 Accepts]: Start accepts. Automaton has 6726 states and 25161 transitions. Word has length 28 [2021-06-05 06:59:27,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:27,657 INFO L482 AbstractCegarLoop]: Abstraction has 6726 states and 25161 transitions. [2021-06-05 06:59:27,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 6726 states and 25161 transitions. [2021-06-05 06:59:27,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:27,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:27,667 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:27,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3553,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:27,868 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:27,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:27,868 INFO L82 PathProgramCache]: Analyzing trace with hash 909319465, now seen corresponding path program 87 times [2021-06-05 06:59:27,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:27,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338745517] [2021-06-05 06:59:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:27,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:27,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338745517] [2021-06-05 06:59:27,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338745517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:27,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062988731] [2021-06-05 06:59:27,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:27,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:59:27,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:27,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:27,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:27,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062988731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:27,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:27,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 06:59:27,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453034296] [2021-06-05 06:59:27,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:59:27,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:27,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:59:27,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:59:27,996 INFO L87 Difference]: Start difference. First operand 6726 states and 25161 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:28,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:28,656 INFO L93 Difference]: Finished difference Result 12718 states and 44233 transitions. [2021-06-05 06:59:28,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:59:28,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:28,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:28,679 INFO L225 Difference]: With dead ends: 12718 [2021-06-05 06:59:28,679 INFO L226 Difference]: Without dead ends: 12718 [2021-06-05 06:59:28,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:59:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12718 states. [2021-06-05 06:59:28,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12718 to 6962. [2021-06-05 06:59:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 6961 states have (on average 3.7214480678063495) internal successors, (25905), 6961 states have internal predecessors, (25905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 25905 transitions. [2021-06-05 06:59:28,825 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 25905 transitions. Word has length 28 [2021-06-05 06:59:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:28,825 INFO L482 AbstractCegarLoop]: Abstraction has 6962 states and 25905 transitions. [2021-06-05 06:59:28,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 25905 transitions. [2021-06-05 06:59:28,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:28,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:28,834 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:29,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3554,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:29,035 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:29,035 INFO L82 PathProgramCache]: Analyzing trace with hash -173703191, now seen corresponding path program 88 times [2021-06-05 06:59:29,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:29,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897711713] [2021-06-05 06:59:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:29,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:29,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897711713] [2021-06-05 06:59:29,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897711713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:29,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264524200] [2021-06-05 06:59:29,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:29,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:29,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:29,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:29,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:29,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264524200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:29,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:29,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:59:29,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307456934] [2021-06-05 06:59:29,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:59:29,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:29,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:59:29,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:59:29,151 INFO L87 Difference]: Start difference. First operand 6962 states and 25905 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-05 06:59:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:29,506 INFO L93 Difference]: Finished difference Result 9470 states and 33921 transitions. [2021-06-05 06:59:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:59:29,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-06-05 06:59:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:29,521 INFO L225 Difference]: With dead ends: 9470 [2021-06-05 06:59:29,521 INFO L226 Difference]: Without dead ends: 9440 [2021-06-05 06:59:29,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:59:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9440 states. [2021-06-05 06:59:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9440 to 7814. [2021-06-05 06:59:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7814 states, 7813 states have (on average 3.749904006143607) internal successors, (29298), 7813 states have internal predecessors, (29298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7814 states to 7814 states and 29298 transitions. [2021-06-05 06:59:29,653 INFO L78 Accepts]: Start accepts. Automaton has 7814 states and 29298 transitions. Word has length 28 [2021-06-05 06:59:29,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:29,653 INFO L482 AbstractCegarLoop]: Abstraction has 7814 states and 29298 transitions. [2021-06-05 06:59:29,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-05 06:59:29,653 INFO L276 IsEmpty]: Start isEmpty. Operand 7814 states and 29298 transitions. [2021-06-05 06:59:29,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:29,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:29,664 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:29,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3555,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:29,865 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:29,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:29,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1297374927, now seen corresponding path program 89 times [2021-06-05 06:59:29,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:29,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577985411] [2021-06-05 06:59:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:29,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:29,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577985411] [2021-06-05 06:59:29,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577985411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:29,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314142191] [2021-06-05 06:59:29,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:29,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:59:29,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:29,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:29,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:29,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314142191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:29,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:29,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:59:29,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031525528] [2021-06-05 06:59:29,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:59:29,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:29,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:59:29,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:59:29,973 INFO L87 Difference]: Start difference. First operand 7814 states and 29298 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-05 06:59:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:30,296 INFO L93 Difference]: Finished difference Result 10065 states and 35894 transitions. [2021-06-05 06:59:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:59:30,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-06-05 06:59:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:30,314 INFO L225 Difference]: With dead ends: 10065 [2021-06-05 06:59:30,314 INFO L226 Difference]: Without dead ends: 10065 [2021-06-05 06:59:30,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:59:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10065 states. [2021-06-05 06:59:30,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10065 to 7854. [2021-06-05 06:59:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7854 states, 7853 states have (on average 3.7459569591239017) internal successors, (29417), 7853 states have internal predecessors, (29417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7854 states to 7854 states and 29417 transitions. [2021-06-05 06:59:30,460 INFO L78 Accepts]: Start accepts. Automaton has 7854 states and 29417 transitions. Word has length 28 [2021-06-05 06:59:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:30,460 INFO L482 AbstractCegarLoop]: Abstraction has 7854 states and 29417 transitions. [2021-06-05 06:59:30,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-05 06:59:30,460 INFO L276 IsEmpty]: Start isEmpty. Operand 7854 states and 29417 transitions. [2021-06-05 06:59:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:30,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:30,472 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:30,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3556,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:30,672 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:30,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:30,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1855439209, now seen corresponding path program 90 times [2021-06-05 06:59:30,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:30,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319752798] [2021-06-05 06:59:30,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:30,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:30,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319752798] [2021-06-05 06:59:30,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319752798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:30,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277855114] [2021-06-05 06:59:30,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:30,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:59:30,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:30,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:30,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:30,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277855114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:30,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:30,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 06:59:30,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079769136] [2021-06-05 06:59:30,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:59:30,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:59:30,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:59:30,782 INFO L87 Difference]: Start difference. First operand 7854 states and 29417 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:31,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:31,354 INFO L93 Difference]: Finished difference Result 13425 states and 47598 transitions. [2021-06-05 06:59:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:59:31,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:31,377 INFO L225 Difference]: With dead ends: 13425 [2021-06-05 06:59:31,377 INFO L226 Difference]: Without dead ends: 13421 [2021-06-05 06:59:31,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:59:31,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2021-06-05 06:59:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 7752. [2021-06-05 06:59:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7752 states, 7751 states have (on average 3.7497097148755) internal successors, (29064), 7751 states have internal predecessors, (29064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7752 states to 7752 states and 29064 transitions. [2021-06-05 06:59:31,550 INFO L78 Accepts]: Start accepts. Automaton has 7752 states and 29064 transitions. Word has length 28 [2021-06-05 06:59:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:31,550 INFO L482 AbstractCegarLoop]: Abstraction has 7752 states and 29064 transitions. [2021-06-05 06:59:31,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 7752 states and 29064 transitions. [2021-06-05 06:59:31,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:31,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:31,560 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:31,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:31,761 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:31,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:31,761 INFO L82 PathProgramCache]: Analyzing trace with hash 812772317, now seen corresponding path program 91 times [2021-06-05 06:59:31,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:31,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924826111] [2021-06-05 06:59:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:31,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:31,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924826111] [2021-06-05 06:59:31,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924826111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:31,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980677935] [2021-06-05 06:59:31,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:31,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:59:31,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:31,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980677935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:31,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:31,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:59:31,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316816518] [2021-06-05 06:59:31,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:59:31,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:31,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:59:31,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:59:31,874 INFO L87 Difference]: Start difference. First operand 7752 states and 29064 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:32,273 INFO L93 Difference]: Finished difference Result 10276 states and 36673 transitions. [2021-06-05 06:59:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:59:32,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:32,289 INFO L225 Difference]: With dead ends: 10276 [2021-06-05 06:59:32,290 INFO L226 Difference]: Without dead ends: 10276 [2021-06-05 06:59:32,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:59:32,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10276 states. [2021-06-05 06:59:32,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10276 to 7683. [2021-06-05 06:59:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.743686539963551) internal successors, (28759), 7682 states have internal predecessors, (28759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28759 transitions. [2021-06-05 06:59:32,448 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28759 transitions. Word has length 28 [2021-06-05 06:59:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:32,448 INFO L482 AbstractCegarLoop]: Abstraction has 7683 states and 28759 transitions. [2021-06-05 06:59:32,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28759 transitions. [2021-06-05 06:59:32,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:32,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:32,459 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:32,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3558 [2021-06-05 06:59:32,660 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:32,660 INFO L82 PathProgramCache]: Analyzing trace with hash 933737069, now seen corresponding path program 92 times [2021-06-05 06:59:32,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:32,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999470628] [2021-06-05 06:59:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:32,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:32,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999470628] [2021-06-05 06:59:32,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999470628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:32,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330308179] [2021-06-05 06:59:32,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:32,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:32,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:32,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:32,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:32,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330308179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:32,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:32,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 06:59:32,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474362972] [2021-06-05 06:59:32,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:59:32,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:32,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:59:32,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:59:32,775 INFO L87 Difference]: Start difference. First operand 7683 states and 28759 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:33,402 INFO L93 Difference]: Finished difference Result 13291 states and 47039 transitions. [2021-06-05 06:59:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:59:33,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:33,428 INFO L225 Difference]: With dead ends: 13291 [2021-06-05 06:59:33,428 INFO L226 Difference]: Without dead ends: 13279 [2021-06-05 06:59:33,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 340.2ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:59:33,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13279 states. [2021-06-05 06:59:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13279 to 7683. [2021-06-05 06:59:33,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.7431658422285863) internal successors, (28755), 7682 states have internal predecessors, (28755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28755 transitions. [2021-06-05 06:59:33,590 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28755 transitions. Word has length 28 [2021-06-05 06:59:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:33,590 INFO L482 AbstractCegarLoop]: Abstraction has 7683 states and 28755 transitions. [2021-06-05 06:59:33,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28755 transitions. [2021-06-05 06:59:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:33,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:33,601 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:33,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3559,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:33,802 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:33,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:33,802 INFO L82 PathProgramCache]: Analyzing trace with hash -306445935, now seen corresponding path program 93 times [2021-06-05 06:59:33,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:33,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905659042] [2021-06-05 06:59:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:33,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:33,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905659042] [2021-06-05 06:59:33,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905659042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:33,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578505237] [2021-06-05 06:59:33,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:33,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:59:33,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:33,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:33,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:33,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578505237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:33,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:33,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:59:33,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681456852] [2021-06-05 06:59:33,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:33,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:33,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:33,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:33,931 INFO L87 Difference]: Start difference. First operand 7683 states and 28755 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:35,097 INFO L93 Difference]: Finished difference Result 20069 states and 69965 transitions. [2021-06-05 06:59:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 06:59:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:35,139 INFO L225 Difference]: With dead ends: 20069 [2021-06-05 06:59:35,139 INFO L226 Difference]: Without dead ends: 20069 [2021-06-05 06:59:35,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 718.9ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:59:35,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20069 states. [2021-06-05 06:59:35,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20069 to 10444. [2021-06-05 06:59:35,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10444 states, 10443 states have (on average 3.790577420281528) internal successors, (39585), 10443 states have internal predecessors, (39585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10444 states to 10444 states and 39585 transitions. [2021-06-05 06:59:35,447 INFO L78 Accepts]: Start accepts. Automaton has 10444 states and 39585 transitions. Word has length 28 [2021-06-05 06:59:35,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:35,447 INFO L482 AbstractCegarLoop]: Abstraction has 10444 states and 39585 transitions. [2021-06-05 06:59:35,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:35,447 INFO L276 IsEmpty]: Start isEmpty. Operand 10444 states and 39585 transitions. [2021-06-05 06:59:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:35,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:35,462 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:35,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3560,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:35,662 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:35,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:35,662 INFO L82 PathProgramCache]: Analyzing trace with hash 765871039, now seen corresponding path program 94 times [2021-06-05 06:59:35,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:35,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778483036] [2021-06-05 06:59:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:35,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:35,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778483036] [2021-06-05 06:59:35,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778483036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:35,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205542091] [2021-06-05 06:59:35,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:35,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:35,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:35,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:35,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:35,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205542091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:35,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:35,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:59:35,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690617156] [2021-06-05 06:59:35,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:35,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:35,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:35,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:35,785 INFO L87 Difference]: Start difference. First operand 10444 states and 39585 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:36,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:36,777 INFO L93 Difference]: Finished difference Result 19312 states and 67991 transitions. [2021-06-05 06:59:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 06:59:36,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:36,813 INFO L225 Difference]: With dead ends: 19312 [2021-06-05 06:59:36,814 INFO L226 Difference]: Without dead ends: 19300 [2021-06-05 06:59:36,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 559.8ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:59:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19300 states. [2021-06-05 06:59:37,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19300 to 10242. [2021-06-05 06:59:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10242 states, 10241 states have (on average 3.799043062200957) internal successors, (38906), 10241 states have internal predecessors, (38906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10242 states to 10242 states and 38906 transitions. [2021-06-05 06:59:37,083 INFO L78 Accepts]: Start accepts. Automaton has 10242 states and 38906 transitions. Word has length 28 [2021-06-05 06:59:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:37,083 INFO L482 AbstractCegarLoop]: Abstraction has 10242 states and 38906 transitions. [2021-06-05 06:59:37,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 10242 states and 38906 transitions. [2021-06-05 06:59:37,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:37,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:37,101 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:37,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3561 [2021-06-05 06:59:37,301 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:37,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:37,302 INFO L82 PathProgramCache]: Analyzing trace with hash 2026707565, now seen corresponding path program 95 times [2021-06-05 06:59:37,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:37,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640363134] [2021-06-05 06:59:37,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:37,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:37,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640363134] [2021-06-05 06:59:37,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640363134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:37,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129711648] [2021-06-05 06:59:37,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:37,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:59:37,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:37,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:37,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:37,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129711648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:37,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:37,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:59:37,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81093527] [2021-06-05 06:59:37,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:37,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:37,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:37,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:37,433 INFO L87 Difference]: Start difference. First operand 10242 states and 38906 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:38,536 INFO L93 Difference]: Finished difference Result 19128 states and 67337 transitions. [2021-06-05 06:59:38,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:59:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:38,578 INFO L225 Difference]: With dead ends: 19128 [2021-06-05 06:59:38,578 INFO L226 Difference]: Without dead ends: 19092 [2021-06-05 06:59:38,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 634.2ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:59:38,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19092 states. [2021-06-05 06:59:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19092 to 10290. [2021-06-05 06:59:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10290 states, 10289 states have (on average 3.7970648265137528) internal successors, (39068), 10289 states have internal predecessors, (39068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10290 states to 10290 states and 39068 transitions. [2021-06-05 06:59:38,854 INFO L78 Accepts]: Start accepts. Automaton has 10290 states and 39068 transitions. Word has length 28 [2021-06-05 06:59:38,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:38,854 INFO L482 AbstractCegarLoop]: Abstraction has 10290 states and 39068 transitions. [2021-06-05 06:59:38,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:38,854 INFO L276 IsEmpty]: Start isEmpty. Operand 10290 states and 39068 transitions. [2021-06-05 06:59:38,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:38,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:38,869 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:39,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3562 [2021-06-05 06:59:39,084 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:39,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:39,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1595973395, now seen corresponding path program 96 times [2021-06-05 06:59:39,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:39,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266100710] [2021-06-05 06:59:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:39,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:39,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266100710] [2021-06-05 06:59:39,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266100710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:39,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582574526] [2021-06-05 06:59:39,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:39,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:59:39,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:39,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:39,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:39,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582574526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:39,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:39,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:59:39,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130399137] [2021-06-05 06:59:39,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:39,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:39,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:39,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:39,245 INFO L87 Difference]: Start difference. First operand 10290 states and 39068 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:40,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:40,605 INFO L93 Difference]: Finished difference Result 19050 states and 67176 transitions. [2021-06-05 06:59:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 06:59:40,605 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:40,643 INFO L225 Difference]: With dead ends: 19050 [2021-06-05 06:59:40,643 INFO L226 Difference]: Without dead ends: 19050 [2021-06-05 06:59:40,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 827.4ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 06:59:40,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19050 states. [2021-06-05 06:59:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19050 to 10488. [2021-06-05 06:59:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10488 states, 10487 states have (on average 3.787832554591399) internal successors, (39723), 10487 states have internal predecessors, (39723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:40,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10488 states to 10488 states and 39723 transitions. [2021-06-05 06:59:40,894 INFO L78 Accepts]: Start accepts. Automaton has 10488 states and 39723 transitions. Word has length 28 [2021-06-05 06:59:40,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:40,894 INFO L482 AbstractCegarLoop]: Abstraction has 10488 states and 39723 transitions. [2021-06-05 06:59:40,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:40,894 INFO L276 IsEmpty]: Start isEmpty. Operand 10488 states and 39723 transitions. [2021-06-05 06:59:40,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:40,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:40,908 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:41,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3563,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:41,110 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:41,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:41,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1643616507, now seen corresponding path program 97 times [2021-06-05 06:59:41,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:41,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966027472] [2021-06-05 06:59:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:41,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:41,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966027472] [2021-06-05 06:59:41,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966027472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:41,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312277838] [2021-06-05 06:59:41,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:41,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:41,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312277838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:41,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:41,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:59:41,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352923849] [2021-06-05 06:59:41,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:41,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:41,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:41,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:41,255 INFO L87 Difference]: Start difference. First operand 10488 states and 39723 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:42,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:42,462 INFO L93 Difference]: Finished difference Result 18660 states and 66098 transitions. [2021-06-05 06:59:42,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:59:42,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:42,499 INFO L225 Difference]: With dead ends: 18660 [2021-06-05 06:59:42,500 INFO L226 Difference]: Without dead ends: 18648 [2021-06-05 06:59:42,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 753.5ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:59:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18648 states. [2021-06-05 06:59:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18648 to 10366. [2021-06-05 06:59:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 3.7916063675832126) internal successors, (39300), 10365 states have internal predecessors, (39300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 39300 transitions. [2021-06-05 06:59:42,768 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 39300 transitions. Word has length 28 [2021-06-05 06:59:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:42,768 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 39300 transitions. [2021-06-05 06:59:42,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 39300 transitions. [2021-06-05 06:59:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:42,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:42,783 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:42,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3564,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:42,983 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:42,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:42,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1168215851, now seen corresponding path program 98 times [2021-06-05 06:59:42,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:42,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970694477] [2021-06-05 06:59:42,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:43,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:43,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970694477] [2021-06-05 06:59:43,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970694477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:43,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496322618] [2021-06-05 06:59:43,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:43,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:43,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:43,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:43,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:43,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496322618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:43,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:43,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 06:59:43,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754010626] [2021-06-05 06:59:43,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:43,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:43,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:43,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:43,116 INFO L87 Difference]: Start difference. First operand 10366 states and 39300 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:44,107 INFO L93 Difference]: Finished difference Result 17898 states and 64003 transitions. [2021-06-05 06:59:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:59:44,107 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:44,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:44,140 INFO L225 Difference]: With dead ends: 17898 [2021-06-05 06:59:44,141 INFO L226 Difference]: Without dead ends: 17862 [2021-06-05 06:59:44,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 563.4ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:59:44,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17862 states. [2021-06-05 06:59:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17862 to 10386. [2021-06-05 06:59:44,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10386 states, 10385 states have (on average 3.7906596051998074) internal successors, (39366), 10385 states have internal predecessors, (39366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10386 states to 10386 states and 39366 transitions. [2021-06-05 06:59:44,408 INFO L78 Accepts]: Start accepts. Automaton has 10386 states and 39366 transitions. Word has length 28 [2021-06-05 06:59:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:44,408 INFO L482 AbstractCegarLoop]: Abstraction has 10386 states and 39366 transitions. [2021-06-05 06:59:44,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 10386 states and 39366 transitions. [2021-06-05 06:59:44,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:44,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:44,422 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:44,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3565 [2021-06-05 06:59:44,623 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:44,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:44,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1708660749, now seen corresponding path program 99 times [2021-06-05 06:59:44,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:44,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810933307] [2021-06-05 06:59:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:44,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:44,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810933307] [2021-06-05 06:59:44,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810933307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:44,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851179794] [2021-06-05 06:59:44,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:44,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:59:44,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:44,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:44,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:44,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851179794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:44,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:44,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:59:44,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573279341] [2021-06-05 06:59:44,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:44,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:44,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:44,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:44,777 INFO L87 Difference]: Start difference. First operand 10386 states and 39366 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:45,983 INFO L93 Difference]: Finished difference Result 26075 states and 92737 transitions. [2021-06-05 06:59:45,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 06:59:45,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:46,037 INFO L225 Difference]: With dead ends: 26075 [2021-06-05 06:59:46,037 INFO L226 Difference]: Without dead ends: 26075 [2021-06-05 06:59:46,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 720.4ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 06:59:46,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26075 states. [2021-06-05 06:59:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26075 to 10692. [2021-06-05 06:59:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10692 states, 10691 states have (on average 3.8184454213824712) internal successors, (40823), 10691 states have internal predecessors, (40823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:46,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10692 states to 10692 states and 40823 transitions. [2021-06-05 06:59:46,406 INFO L78 Accepts]: Start accepts. Automaton has 10692 states and 40823 transitions. Word has length 28 [2021-06-05 06:59:46,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:46,406 INFO L482 AbstractCegarLoop]: Abstraction has 10692 states and 40823 transitions. [2021-06-05 06:59:46,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:46,407 INFO L276 IsEmpty]: Start isEmpty. Operand 10692 states and 40823 transitions. [2021-06-05 06:59:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:46,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:46,422 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:46,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3566,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:46,628 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:46,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:46,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1057401903, now seen corresponding path program 100 times [2021-06-05 06:59:46,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:46,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590948498] [2021-06-05 06:59:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:46,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:46,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590948498] [2021-06-05 06:59:46,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590948498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:46,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430312721] [2021-06-05 06:59:46,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:46,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:46,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:46,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:46,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:46,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430312721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:46,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:46,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:59:46,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664953235] [2021-06-05 06:59:46,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:46,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:46,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:46,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:46,783 INFO L87 Difference]: Start difference. First operand 10692 states and 40823 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:47,938 INFO L93 Difference]: Finished difference Result 25519 states and 91410 transitions. [2021-06-05 06:59:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 06:59:47,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:47,991 INFO L225 Difference]: With dead ends: 25519 [2021-06-05 06:59:47,991 INFO L226 Difference]: Without dead ends: 25519 [2021-06-05 06:59:47,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 702.2ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:59:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25519 states. [2021-06-05 06:59:48,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25519 to 10592. [2021-06-05 06:59:48,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.8053063922198094) internal successors, (40302), 10591 states have internal predecessors, (40302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 40302 transitions. [2021-06-05 06:59:48,364 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 40302 transitions. Word has length 28 [2021-06-05 06:59:48,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:48,365 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 40302 transitions. [2021-06-05 06:59:48,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 40302 transitions. [2021-06-05 06:59:48,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:48,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:48,380 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:48,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3567,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:48,581 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:48,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1158271565, now seen corresponding path program 101 times [2021-06-05 06:59:48,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:48,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792173548] [2021-06-05 06:59:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:48,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:48,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792173548] [2021-06-05 06:59:48,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792173548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:48,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728001656] [2021-06-05 06:59:48,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:48,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:59:48,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:48,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:48,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:48,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728001656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:48,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:48,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:59:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46640326] [2021-06-05 06:59:48,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:48,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:48,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:48,724 INFO L87 Difference]: Start difference. First operand 10592 states and 40302 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:49,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:49,541 INFO L93 Difference]: Finished difference Result 20262 states and 72808 transitions. [2021-06-05 06:59:49,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:59:49,541 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:49,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:49,579 INFO L225 Difference]: With dead ends: 20262 [2021-06-05 06:59:49,579 INFO L226 Difference]: Without dead ends: 20262 [2021-06-05 06:59:49,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 433.2ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:59:49,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20262 states. [2021-06-05 06:59:49,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20262 to 10601. [2021-06-05 06:59:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10601 states, 10600 states have (on average 3.8042452830188678) internal successors, (40325), 10600 states have internal predecessors, (40325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10601 states to 10601 states and 40325 transitions. [2021-06-05 06:59:49,824 INFO L78 Accepts]: Start accepts. Automaton has 10601 states and 40325 transitions. Word has length 28 [2021-06-05 06:59:49,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:49,824 INFO L482 AbstractCegarLoop]: Abstraction has 10601 states and 40325 transitions. [2021-06-05 06:59:49,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 10601 states and 40325 transitions. [2021-06-05 06:59:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:49,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:49,839 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:50,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3568,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:50,039 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:50,040 INFO L82 PathProgramCache]: Analyzing trace with hash 545777745, now seen corresponding path program 102 times [2021-06-05 06:59:50,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:50,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18378894] [2021-06-05 06:59:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:50,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:50,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18378894] [2021-06-05 06:59:50,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18378894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:50,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945015348] [2021-06-05 06:59:50,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:50,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:59:50,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:50,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:50,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:50,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945015348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:50,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:50,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:59:50,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778571039] [2021-06-05 06:59:50,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:50,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:50,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:50,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:50,185 INFO L87 Difference]: Start difference. First operand 10601 states and 40325 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:50,973 INFO L93 Difference]: Finished difference Result 18811 states and 68168 transitions. [2021-06-05 06:59:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:59:50,974 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:50,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:51,009 INFO L225 Difference]: With dead ends: 18811 [2021-06-05 06:59:51,010 INFO L226 Difference]: Without dead ends: 18811 [2021-06-05 06:59:51,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 436.8ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:59:51,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18811 states. [2021-06-05 06:59:51,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18811 to 10613. [2021-06-05 06:59:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10613 states, 10612 states have (on average 3.80352431209951) internal successors, (40363), 10612 states have internal predecessors, (40363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:51,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 40363 transitions. [2021-06-05 06:59:51,317 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 40363 transitions. Word has length 28 [2021-06-05 06:59:51,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:51,317 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 40363 transitions. [2021-06-05 06:59:51,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:51,318 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 40363 transitions. [2021-06-05 06:59:51,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:51,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:51,333 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:51,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3569 [2021-06-05 06:59:51,533 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:51,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1430395937, now seen corresponding path program 103 times [2021-06-05 06:59:51,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:51,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980327317] [2021-06-05 06:59:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:51,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:51,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980327317] [2021-06-05 06:59:51,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980327317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:51,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894237185] [2021-06-05 06:59:51,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:51,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:51,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:51,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894237185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:51,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:51,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:59:51,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718588505] [2021-06-05 06:59:51,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:51,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:51,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:51,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:51,683 INFO L87 Difference]: Start difference. First operand 10613 states and 40363 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:52,721 INFO L93 Difference]: Finished difference Result 19418 states and 69911 transitions. [2021-06-05 06:59:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 06:59:52,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:52,759 INFO L225 Difference]: With dead ends: 19418 [2021-06-05 06:59:52,760 INFO L226 Difference]: Without dead ends: 19418 [2021-06-05 06:59:52,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 651.2ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:59:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19418 states. [2021-06-05 06:59:52,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19418 to 10725. [2021-06-05 06:59:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10725 states, 10724 states have (on average 3.7958784035807533) internal successors, (40707), 10724 states have internal predecessors, (40707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:53,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10725 states to 10725 states and 40707 transitions. [2021-06-05 06:59:53,024 INFO L78 Accepts]: Start accepts. Automaton has 10725 states and 40707 transitions. Word has length 28 [2021-06-05 06:59:53,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:53,024 INFO L482 AbstractCegarLoop]: Abstraction has 10725 states and 40707 transitions. [2021-06-05 06:59:53,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:53,024 INFO L276 IsEmpty]: Start isEmpty. Operand 10725 states and 40707 transitions. [2021-06-05 06:59:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:53,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:53,040 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:53,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3570 [2021-06-05 06:59:53,240 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash 375018543, now seen corresponding path program 104 times [2021-06-05 06:59:53,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:53,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138259998] [2021-06-05 06:59:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:53,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:53,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138259998] [2021-06-05 06:59:53,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138259998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:53,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832464786] [2021-06-05 06:59:53,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:53,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:53,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:53,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:53,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:53,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832464786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:53,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:53,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:59:53,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467075897] [2021-06-05 06:59:53,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:53,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:53,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:53,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:53,447 INFO L87 Difference]: Start difference. First operand 10725 states and 40707 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:54,343 INFO L93 Difference]: Finished difference Result 18990 states and 68747 transitions. [2021-06-05 06:59:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:59:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:54,378 INFO L225 Difference]: With dead ends: 18990 [2021-06-05 06:59:54,379 INFO L226 Difference]: Without dead ends: 18986 [2021-06-05 06:59:54,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 596.4ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:59:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18986 states. [2021-06-05 06:59:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18986 to 10651. [2021-06-05 06:59:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10651 states, 10650 states have (on average 3.7998122065727697) internal successors, (40468), 10650 states have internal predecessors, (40468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10651 states to 10651 states and 40468 transitions. [2021-06-05 06:59:54,621 INFO L78 Accepts]: Start accepts. Automaton has 10651 states and 40468 transitions. Word has length 28 [2021-06-05 06:59:54,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:54,622 INFO L482 AbstractCegarLoop]: Abstraction has 10651 states and 40468 transitions. [2021-06-05 06:59:54,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:54,622 INFO L276 IsEmpty]: Start isEmpty. Operand 10651 states and 40468 transitions. [2021-06-05 06:59:54,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:54,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:54,636 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:54,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3571 [2021-06-05 06:59:54,837 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:54,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:54,837 INFO L82 PathProgramCache]: Analyzing trace with hash -156751667, now seen corresponding path program 105 times [2021-06-05 06:59:54,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:54,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311345165] [2021-06-05 06:59:54,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:54,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:54,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311345165] [2021-06-05 06:59:54,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311345165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:54,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630455352] [2021-06-05 06:59:54,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:54,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:59:54,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:54,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:54,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:54,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630455352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:54,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:54,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:59:54,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44273813] [2021-06-05 06:59:54,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:54,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:54,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:54,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:54,993 INFO L87 Difference]: Start difference. First operand 10651 states and 40468 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:55,993 INFO L93 Difference]: Finished difference Result 18417 states and 66232 transitions. [2021-06-05 06:59:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:59:55,993 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:56,028 INFO L225 Difference]: With dead ends: 18417 [2021-06-05 06:59:56,028 INFO L226 Difference]: Without dead ends: 18417 [2021-06-05 06:59:56,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 621.6ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:59:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18417 states. [2021-06-05 06:59:56,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18417 to 10878. [2021-06-05 06:59:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10878 states, 10877 states have (on average 3.803070699641445) internal successors, (41366), 10877 states have internal predecessors, (41366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:56,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10878 states to 10878 states and 41366 transitions. [2021-06-05 06:59:56,309 INFO L78 Accepts]: Start accepts. Automaton has 10878 states and 41366 transitions. Word has length 28 [2021-06-05 06:59:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:56,309 INFO L482 AbstractCegarLoop]: Abstraction has 10878 states and 41366 transitions. [2021-06-05 06:59:56,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:56,309 INFO L276 IsEmpty]: Start isEmpty. Operand 10878 states and 41366 transitions. [2021-06-05 06:59:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:56,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:56,324 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:56,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3572 [2021-06-05 06:59:56,524 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:56,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:56,525 INFO L82 PathProgramCache]: Analyzing trace with hash -534318835, now seen corresponding path program 106 times [2021-06-05 06:59:56,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:56,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093769523] [2021-06-05 06:59:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:56,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:56,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093769523] [2021-06-05 06:59:56,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093769523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:56,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653655730] [2021-06-05 06:59:56,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:56,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:56,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:56,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:56,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653655730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:56,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:56,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:59:56,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558209554] [2021-06-05 06:59:56,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:56,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:56,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:56,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:56,683 INFO L87 Difference]: Start difference. First operand 10878 states and 41366 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:57,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:57,588 INFO L93 Difference]: Finished difference Result 18127 states and 65426 transitions. [2021-06-05 06:59:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:59:57,588 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:57,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:57,622 INFO L225 Difference]: With dead ends: 18127 [2021-06-05 06:59:57,622 INFO L226 Difference]: Without dead ends: 18115 [2021-06-05 06:59:57,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 532.6ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:59:57,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18115 states. [2021-06-05 06:59:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18115 to 10980. [2021-06-05 06:59:57,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 3.79715821113034) internal successors, (41689), 10979 states have internal predecessors, (41689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:57,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 41689 transitions. [2021-06-05 06:59:57,875 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 41689 transitions. Word has length 28 [2021-06-05 06:59:57,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:57,875 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 41689 transitions. [2021-06-05 06:59:57,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 41689 transitions. [2021-06-05 06:59:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:57,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:57,891 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:58,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3573 [2021-06-05 06:59:58,091 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:58,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:58,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1732149001, now seen corresponding path program 73 times [2021-06-05 06:59:58,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:58,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980906647] [2021-06-05 06:59:58,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:58,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:58,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980906647] [2021-06-05 06:59:58,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980906647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:58,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720735558] [2021-06-05 06:59:58,131 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:58,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:58,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:58,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720735558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:58,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:58,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 06:59:58,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455473987] [2021-06-05 06:59:58,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:59:58,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:58,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:59:58,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:59:58,215 INFO L87 Difference]: Start difference. First operand 10980 states and 41689 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-05 06:59:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:58,649 INFO L93 Difference]: Finished difference Result 15635 states and 57800 transitions. [2021-06-05 06:59:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:59:58,649 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 06:59:58,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:58,731 INFO L225 Difference]: With dead ends: 15635 [2021-06-05 06:59:58,731 INFO L226 Difference]: Without dead ends: 15635 [2021-06-05 06:59:58,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:59:58,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15635 states. [2021-06-05 06:59:58,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15635 to 11052. [2021-06-05 06:59:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 11051 states have (on average 3.7925074653877475) internal successors, (41911), 11051 states have internal predecessors, (41911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 41911 transitions. [2021-06-05 06:59:58,929 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 41911 transitions. Word has length 28 [2021-06-05 06:59:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:58,929 INFO L482 AbstractCegarLoop]: Abstraction has 11052 states and 41911 transitions. [2021-06-05 06:59:58,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-05 06:59:58,929 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 41911 transitions. [2021-06-05 06:59:58,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:59:58,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:58,945 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:59,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3574,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:59,145 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:59,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:59,146 INFO L82 PathProgramCache]: Analyzing trace with hash -38357591, now seen corresponding path program 74 times [2021-06-05 06:59:59,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:59,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424128178] [2021-06-05 06:59:59,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:59,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:59,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424128178] [2021-06-05 06:59:59,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424128178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:59,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636455551] [2021-06-05 06:59:59,177 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:59,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:59,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:59,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:59,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:59,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636455551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:59,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:59,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:59:59,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330014553] [2021-06-05 06:59:59,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:59:59,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:59,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:59:59,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:59:59,258 INFO L87 Difference]: Start difference. First operand 11052 states and 41911 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:59,743 INFO L93 Difference]: Finished difference Result 16589 states and 60571 transitions. [2021-06-05 06:59:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:59:59,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:59:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:59,776 INFO L225 Difference]: With dead ends: 16589 [2021-06-05 06:59:59,776 INFO L226 Difference]: Without dead ends: 16589 [2021-06-05 06:59:59,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:59:59,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16589 states. [2021-06-05 06:59:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16589 to 11366. [2021-06-05 06:59:59,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11366 states, 11365 states have (on average 3.7756269247690275) internal successors, (42910), 11365 states have internal predecessors, (42910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:00,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11366 states to 11366 states and 42910 transitions. [2021-06-05 07:00:00,006 INFO L78 Accepts]: Start accepts. Automaton has 11366 states and 42910 transitions. Word has length 28 [2021-06-05 07:00:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:00,006 INFO L482 AbstractCegarLoop]: Abstraction has 11366 states and 42910 transitions. [2021-06-05 07:00:00,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:00,006 INFO L276 IsEmpty]: Start isEmpty. Operand 11366 states and 42910 transitions. [2021-06-05 07:00:00,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:00,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:00,021 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:00,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3575,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:00,222 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:00,222 INFO L82 PathProgramCache]: Analyzing trace with hash 907762153, now seen corresponding path program 75 times [2021-06-05 07:00:00,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:00,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110061136] [2021-06-05 07:00:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:00,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:00,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110061136] [2021-06-05 07:00:00,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110061136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:00,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521549907] [2021-06-05 07:00:00,255 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:00,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:00:00,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:00,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:00,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:00,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521549907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:00,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:00,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:00:00,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326455522] [2021-06-05 07:00:00,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:00:00,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:00,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:00:00,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:00:00,333 INFO L87 Difference]: Start difference. First operand 11366 states and 42910 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:00,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:00,729 INFO L93 Difference]: Finished difference Result 16097 states and 59284 transitions. [2021-06-05 07:00:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:00:00,729 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:00,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:00,760 INFO L225 Difference]: With dead ends: 16097 [2021-06-05 07:00:00,760 INFO L226 Difference]: Without dead ends: 16089 [2021-06-05 07:00:00,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:00:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16089 states. [2021-06-05 07:00:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16089 to 11306. [2021-06-05 07:00:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11306 states, 11305 states have (on average 3.77797434763379) internal successors, (42710), 11305 states have internal predecessors, (42710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:01,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11306 states to 11306 states and 42710 transitions. [2021-06-05 07:00:01,028 INFO L78 Accepts]: Start accepts. Automaton has 11306 states and 42710 transitions. Word has length 28 [2021-06-05 07:00:01,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:01,028 INFO L482 AbstractCegarLoop]: Abstraction has 11306 states and 42710 transitions. [2021-06-05 07:00:01,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:01,028 INFO L276 IsEmpty]: Start isEmpty. Operand 11306 states and 42710 transitions. [2021-06-05 07:00:01,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:01,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:01,044 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:01,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3576,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:01,245 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:01,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:01,245 INFO L82 PathProgramCache]: Analyzing trace with hash -13939987, now seen corresponding path program 76 times [2021-06-05 07:00:01,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:01,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731709344] [2021-06-05 07:00:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:01,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:01,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731709344] [2021-06-05 07:00:01,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731709344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:01,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268636011] [2021-06-05 07:00:01,289 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:01,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:01,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:01,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:01,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:01,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268636011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:01,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:01,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:00:01,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241403473] [2021-06-05 07:00:01,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:01,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:01,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:01,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:01,367 INFO L87 Difference]: Start difference. First operand 11306 states and 42710 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-05 07:00:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:01,816 INFO L93 Difference]: Finished difference Result 15997 states and 59000 transitions. [2021-06-05 07:00:01,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:00:01,816 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 07:00:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:01,850 INFO L225 Difference]: With dead ends: 15997 [2021-06-05 07:00:01,850 INFO L226 Difference]: Without dead ends: 15985 [2021-06-05 07:00:01,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:00:01,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15985 states. [2021-06-05 07:00:02,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15985 to 11272. [2021-06-05 07:00:02,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11272 states, 11271 states have (on average 3.780055008428711) internal successors, (42605), 11271 states have internal predecessors, (42605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:02,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11272 states to 11272 states and 42605 transitions. [2021-06-05 07:00:02,092 INFO L78 Accepts]: Start accepts. Automaton has 11272 states and 42605 transitions. Word has length 28 [2021-06-05 07:00:02,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:02,092 INFO L482 AbstractCegarLoop]: Abstraction has 11272 states and 42605 transitions. [2021-06-05 07:00:02,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-05 07:00:02,092 INFO L276 IsEmpty]: Start isEmpty. Operand 11272 states and 42605 transitions. [2021-06-05 07:00:02,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:02,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:02,108 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:02,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3577 [2021-06-05 07:00:02,309 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:02,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:02,309 INFO L82 PathProgramCache]: Analyzing trace with hash -141251547, now seen corresponding path program 77 times [2021-06-05 07:00:02,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:02,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864241515] [2021-06-05 07:00:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:02,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:02,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864241515] [2021-06-05 07:00:02,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864241515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:02,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782549312] [2021-06-05 07:00:02,362 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:02,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:00:02,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:02,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:02,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:02,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782549312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:02,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:02,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:00:02,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992262000] [2021-06-05 07:00:02,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:00:02,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:02,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:00:02,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:00:02,489 INFO L87 Difference]: Start difference. First operand 11272 states and 42605 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:03,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:03,445 INFO L93 Difference]: Finished difference Result 21775 states and 77547 transitions. [2021-06-05 07:00:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:00:03,445 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:03,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:03,491 INFO L225 Difference]: With dead ends: 21775 [2021-06-05 07:00:03,491 INFO L226 Difference]: Without dead ends: 21775 [2021-06-05 07:00:03,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:00:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21775 states. [2021-06-05 07:00:03,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21775 to 11246. [2021-06-05 07:00:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11246 states, 11245 states have (on average 3.779101823032459) internal successors, (42496), 11245 states have internal predecessors, (42496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 42496 transitions. [2021-06-05 07:00:03,856 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 42496 transitions. Word has length 28 [2021-06-05 07:00:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:03,856 INFO L482 AbstractCegarLoop]: Abstraction has 11246 states and 42496 transitions. [2021-06-05 07:00:03,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 42496 transitions. [2021-06-05 07:00:03,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:03,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:03,874 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:04,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3578,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:04,075 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:04,075 INFO L82 PathProgramCache]: Analyzing trace with hash 385520361, now seen corresponding path program 107 times [2021-06-05 07:00:04,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:04,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887623088] [2021-06-05 07:00:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:04,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:04,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887623088] [2021-06-05 07:00:04,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887623088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:04,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697061177] [2021-06-05 07:00:04,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:04,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:00:04,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:04,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:04,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697061177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:04,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:04,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 07:00:04,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795252805] [2021-06-05 07:00:04,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:00:04,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:04,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:00:04,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:00:04,221 INFO L87 Difference]: Start difference. First operand 11246 states and 42496 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:05,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:05,086 INFO L93 Difference]: Finished difference Result 17570 states and 63375 transitions. [2021-06-05 07:00:05,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:00:05,087 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:05,125 INFO L225 Difference]: With dead ends: 17570 [2021-06-05 07:00:05,125 INFO L226 Difference]: Without dead ends: 17557 [2021-06-05 07:00:05,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 441.6ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:00:05,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17557 states. [2021-06-05 07:00:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17557 to 12557. [2021-06-05 07:00:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12557 states, 12556 states have (on average 3.8467664861420836) internal successors, (48300), 12556 states have internal predecessors, (48300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:05,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12557 states to 12557 states and 48300 transitions. [2021-06-05 07:00:05,425 INFO L78 Accepts]: Start accepts. Automaton has 12557 states and 48300 transitions. Word has length 28 [2021-06-05 07:00:05,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:05,425 INFO L482 AbstractCegarLoop]: Abstraction has 12557 states and 48300 transitions. [2021-06-05 07:00:05,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:05,425 INFO L276 IsEmpty]: Start isEmpty. Operand 12557 states and 48300 transitions. [2021-06-05 07:00:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:05,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:05,445 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:05,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3579 [2021-06-05 07:00:05,648 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:05,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:05,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1057933143, now seen corresponding path program 108 times [2021-06-05 07:00:05,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:05,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024642175] [2021-06-05 07:00:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:05,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:05,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024642175] [2021-06-05 07:00:05,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024642175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:05,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25740101] [2021-06-05 07:00:05,693 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:05,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:00:05,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:05,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:05,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:05,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25740101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:05,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:05,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 07:00:05,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098823595] [2021-06-05 07:00:05,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:00:05,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:05,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:00:05,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:00:05,800 INFO L87 Difference]: Start difference. First operand 12557 states and 48300 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:06,527 INFO L93 Difference]: Finished difference Result 17668 states and 63624 transitions. [2021-06-05 07:00:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:00:06,527 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:06,561 INFO L225 Difference]: With dead ends: 17668 [2021-06-05 07:00:06,561 INFO L226 Difference]: Without dead ends: 17662 [2021-06-05 07:00:06,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 392.3ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:00:06,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17662 states. [2021-06-05 07:00:06,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17662 to 12530. [2021-06-05 07:00:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 12529 states have (on average 3.845957378880996) internal successors, (48186), 12529 states have internal predecessors, (48186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 48186 transitions. [2021-06-05 07:00:06,859 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 48186 transitions. Word has length 28 [2021-06-05 07:00:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:06,860 INFO L482 AbstractCegarLoop]: Abstraction has 12530 states and 48186 transitions. [2021-06-05 07:00:06,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:06,860 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 48186 transitions. [2021-06-05 07:00:06,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:06,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:06,877 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:07,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3580,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:07,078 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:07,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:07,078 INFO L82 PathProgramCache]: Analyzing trace with hash -757405679, now seen corresponding path program 109 times [2021-06-05 07:00:07,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:07,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957302497] [2021-06-05 07:00:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:07,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:07,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957302497] [2021-06-05 07:00:07,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957302497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:07,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138251994] [2021-06-05 07:00:07,117 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:07,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:07,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:07,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138251994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:07,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:07,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:00:07,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087440979] [2021-06-05 07:00:07,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:07,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:07,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:07,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:07,345 INFO L87 Difference]: Start difference. First operand 12530 states and 48186 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:08,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:08,058 INFO L93 Difference]: Finished difference Result 19731 states and 71148 transitions. [2021-06-05 07:00:08,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:00:08,059 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:08,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:08,098 INFO L225 Difference]: With dead ends: 19731 [2021-06-05 07:00:08,098 INFO L226 Difference]: Without dead ends: 19718 [2021-06-05 07:00:08,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 357.4ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:00:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19718 states. [2021-06-05 07:00:08,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19718 to 12590. [2021-06-05 07:00:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12590 states, 12589 states have (on average 3.850663277464453) internal successors, (48476), 12589 states have internal predecessors, (48476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12590 states to 12590 states and 48476 transitions. [2021-06-05 07:00:08,410 INFO L78 Accepts]: Start accepts. Automaton has 12590 states and 48476 transitions. Word has length 28 [2021-06-05 07:00:08,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:08,410 INFO L482 AbstractCegarLoop]: Abstraction has 12590 states and 48476 transitions. [2021-06-05 07:00:08,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:08,410 INFO L276 IsEmpty]: Start isEmpty. Operand 12590 states and 48476 transitions. [2021-06-05 07:00:08,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:08,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:08,430 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:08,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3581,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:08,630 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:08,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1440150009, now seen corresponding path program 110 times [2021-06-05 07:00:08,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:08,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746947462] [2021-06-05 07:00:08,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:08,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:08,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746947462] [2021-06-05 07:00:08,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746947462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:08,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770062368] [2021-06-05 07:00:08,659 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:08,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:08,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:08,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:08,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:08,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770062368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:08,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:08,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 07:00:08,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699869950] [2021-06-05 07:00:08,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:08,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:08,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:08,765 INFO L87 Difference]: Start difference. First operand 12590 states and 48476 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:09,473 INFO L93 Difference]: Finished difference Result 20868 states and 74696 transitions. [2021-06-05 07:00:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:00:09,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:09,513 INFO L225 Difference]: With dead ends: 20868 [2021-06-05 07:00:09,513 INFO L226 Difference]: Without dead ends: 20868 [2021-06-05 07:00:09,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 403.7ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:00:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20868 states. [2021-06-05 07:00:09,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20868 to 12606. [2021-06-05 07:00:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12606 states, 12605 states have (on average 3.8476001586671957) internal successors, (48499), 12605 states have internal predecessors, (48499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:09,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12606 states to 12606 states and 48499 transitions. [2021-06-05 07:00:09,840 INFO L78 Accepts]: Start accepts. Automaton has 12606 states and 48499 transitions. Word has length 28 [2021-06-05 07:00:09,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:09,840 INFO L482 AbstractCegarLoop]: Abstraction has 12606 states and 48499 transitions. [2021-06-05 07:00:09,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:09,840 INFO L276 IsEmpty]: Start isEmpty. Operand 12606 states and 48499 transitions. [2021-06-05 07:00:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:09,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:09,860 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:10,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3582 [2021-06-05 07:00:10,077 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:10,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:10,077 INFO L82 PathProgramCache]: Analyzing trace with hash -373053407, now seen corresponding path program 78 times [2021-06-05 07:00:10,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:10,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898131259] [2021-06-05 07:00:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:10,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:10,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898131259] [2021-06-05 07:00:10,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898131259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:10,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139147917] [2021-06-05 07:00:10,130 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:10,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:00:10,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:10,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:10,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:10,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139147917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:10,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:10,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:00:10,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392337347] [2021-06-05 07:00:10,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:00:10,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:10,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:00:10,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:00:10,264 INFO L87 Difference]: Start difference. First operand 12606 states and 48499 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:11,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:11,181 INFO L93 Difference]: Finished difference Result 21980 states and 80698 transitions. [2021-06-05 07:00:11,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 07:00:11,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:11,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:11,227 INFO L225 Difference]: With dead ends: 21980 [2021-06-05 07:00:11,227 INFO L226 Difference]: Without dead ends: 21976 [2021-06-05 07:00:11,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 541.4ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:00:11,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2021-06-05 07:00:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 12860. [2021-06-05 07:00:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12860 states, 12859 states have (on average 3.837001322031262) internal successors, (49340), 12859 states have internal predecessors, (49340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12860 states to 12860 states and 49340 transitions. [2021-06-05 07:00:11,580 INFO L78 Accepts]: Start accepts. Automaton has 12860 states and 49340 transitions. Word has length 28 [2021-06-05 07:00:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:11,580 INFO L482 AbstractCegarLoop]: Abstraction has 12860 states and 49340 transitions. [2021-06-05 07:00:11,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 12860 states and 49340 transitions. [2021-06-05 07:00:11,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:11,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:11,600 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:11,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3583,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:11,801 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash -498610355, now seen corresponding path program 111 times [2021-06-05 07:00:11,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:11,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428569504] [2021-06-05 07:00:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:11,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:11,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428569504] [2021-06-05 07:00:11,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428569504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:11,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903957585] [2021-06-05 07:00:11,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:11,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:00:11,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:11,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:11,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:11,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903957585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:11,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:11,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:00:11,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750102087] [2021-06-05 07:00:11,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:11,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:11,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:11,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:11,929 INFO L87 Difference]: Start difference. First operand 12860 states and 49340 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:12,592 INFO L93 Difference]: Finished difference Result 18670 states and 68341 transitions. [2021-06-05 07:00:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:00:12,592 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:12,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:12,643 INFO L225 Difference]: With dead ends: 18670 [2021-06-05 07:00:12,643 INFO L226 Difference]: Without dead ends: 18647 [2021-06-05 07:00:12,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:00:12,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18647 states. [2021-06-05 07:00:12,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18647 to 13152. [2021-06-05 07:00:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13152 states, 13151 states have (on average 3.854307657212379) internal successors, (50688), 13151 states have internal predecessors, (50688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13152 states to 13152 states and 50688 transitions. [2021-06-05 07:00:12,967 INFO L78 Accepts]: Start accepts. Automaton has 13152 states and 50688 transitions. Word has length 28 [2021-06-05 07:00:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:12,968 INFO L482 AbstractCegarLoop]: Abstraction has 13152 states and 50688 transitions. [2021-06-05 07:00:12,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 13152 states and 50688 transitions. [2021-06-05 07:00:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:12,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:12,989 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:13,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3584 [2021-06-05 07:00:13,190 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:13,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:13,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1181354685, now seen corresponding path program 112 times [2021-06-05 07:00:13,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:13,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117172510] [2021-06-05 07:00:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:13,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:13,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117172510] [2021-06-05 07:00:13,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117172510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:13,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852209693] [2021-06-05 07:00:13,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:13,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:13,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:13,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:13,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:13,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852209693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:13,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:13,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:00:13,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312199703] [2021-06-05 07:00:13,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:13,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:13,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:13,332 INFO L87 Difference]: Start difference. First operand 13152 states and 50688 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:14,075 INFO L93 Difference]: Finished difference Result 18648 states and 67382 transitions. [2021-06-05 07:00:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:00:14,076 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:14,118 INFO L225 Difference]: With dead ends: 18648 [2021-06-05 07:00:14,118 INFO L226 Difference]: Without dead ends: 18648 [2021-06-05 07:00:14,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:00:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18648 states. [2021-06-05 07:00:14,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18648 to 13107. [2021-06-05 07:00:14,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13107 states, 13106 states have (on average 3.8461010224324736) internal successors, (50407), 13106 states have internal predecessors, (50407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13107 states to 13107 states and 50407 transitions. [2021-06-05 07:00:14,446 INFO L78 Accepts]: Start accepts. Automaton has 13107 states and 50407 transitions. Word has length 28 [2021-06-05 07:00:14,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:14,447 INFO L482 AbstractCegarLoop]: Abstraction has 13107 states and 50407 transitions. [2021-06-05 07:00:14,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:14,447 INFO L276 IsEmpty]: Start isEmpty. Operand 13107 states and 50407 transitions. [2021-06-05 07:00:14,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:14,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:14,469 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:14,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:14,673 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:14,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:14,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1501473149, now seen corresponding path program 113 times [2021-06-05 07:00:14,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:14,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50736566] [2021-06-05 07:00:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:14,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:14,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50736566] [2021-06-05 07:00:14,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50736566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:14,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738209234] [2021-06-05 07:00:14,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:14,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:00:14,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:14,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:14,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:14,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738209234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:14,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:14,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:00:14,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423862698] [2021-06-05 07:00:14,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:14,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:14,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:14,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:14,819 INFO L87 Difference]: Start difference. First operand 13107 states and 50407 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:15,502 INFO L93 Difference]: Finished difference Result 19972 states and 72578 transitions. [2021-06-05 07:00:15,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:00:15,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:15,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:15,546 INFO L225 Difference]: With dead ends: 19972 [2021-06-05 07:00:15,546 INFO L226 Difference]: Without dead ends: 19972 [2021-06-05 07:00:15,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:00:15,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19972 states. [2021-06-05 07:00:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19972 to 13820. [2021-06-05 07:00:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13820 states, 13819 states have (on average 3.832259931977712) internal successors, (52958), 13819 states have internal predecessors, (52958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:15,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13820 states to 13820 states and 52958 transitions. [2021-06-05 07:00:15,872 INFO L78 Accepts]: Start accepts. Automaton has 13820 states and 52958 transitions. Word has length 28 [2021-06-05 07:00:15,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:15,872 INFO L482 AbstractCegarLoop]: Abstraction has 13820 states and 52958 transitions. [2021-06-05 07:00:15,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:15,872 INFO L276 IsEmpty]: Start isEmpty. Operand 13820 states and 52958 transitions. [2021-06-05 07:00:15,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:15,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:15,895 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:16,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:16,099 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:16,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:16,100 INFO L82 PathProgramCache]: Analyzing trace with hash -612070185, now seen corresponding path program 114 times [2021-06-05 07:00:16,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:16,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003643135] [2021-06-05 07:00:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:16,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:16,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003643135] [2021-06-05 07:00:16,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003643135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:16,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459295385] [2021-06-05 07:00:16,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:16,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:00:16,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:16,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:16,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459295385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:16,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:16,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 07:00:16,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820523229] [2021-06-05 07:00:16,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:00:16,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:16,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:00:16,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:00:16,269 INFO L87 Difference]: Start difference. First operand 13820 states and 52958 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:17,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:17,175 INFO L93 Difference]: Finished difference Result 22381 states and 80178 transitions. [2021-06-05 07:00:17,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:00:17,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:17,221 INFO L225 Difference]: With dead ends: 22381 [2021-06-05 07:00:17,221 INFO L226 Difference]: Without dead ends: 22381 [2021-06-05 07:00:17,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 514.1ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:00:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22381 states. [2021-06-05 07:00:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22381 to 14048. [2021-06-05 07:00:17,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14048 states, 14047 states have (on average 3.843881255784153) internal successors, (53995), 14047 states have internal predecessors, (53995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14048 states to 14048 states and 53995 transitions. [2021-06-05 07:00:17,596 INFO L78 Accepts]: Start accepts. Automaton has 14048 states and 53995 transitions. Word has length 28 [2021-06-05 07:00:17,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:17,596 INFO L482 AbstractCegarLoop]: Abstraction has 14048 states and 53995 transitions. [2021-06-05 07:00:17,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 14048 states and 53995 transitions. [2021-06-05 07:00:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:17,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:17,617 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:17,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3587,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:17,818 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:17,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1934603223, now seen corresponding path program 79 times [2021-06-05 07:00:17,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:17,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33291532] [2021-06-05 07:00:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:17,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:17,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33291532] [2021-06-05 07:00:17,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33291532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:17,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461069892] [2021-06-05 07:00:17,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:17,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:17,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:17,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461069892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:17,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:17,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:00:17,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811860555] [2021-06-05 07:00:17,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:00:17,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:17,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:00:17,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:00:17,978 INFO L87 Difference]: Start difference. First operand 14048 states and 53995 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:19,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:19,535 INFO L93 Difference]: Finished difference Result 39001 states and 140171 transitions. [2021-06-05 07:00:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 07:00:19,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:19,625 INFO L225 Difference]: With dead ends: 39001 [2021-06-05 07:00:19,625 INFO L226 Difference]: Without dead ends: 39001 [2021-06-05 07:00:19,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 919.7ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:00:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39001 states. [2021-06-05 07:00:20,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39001 to 15286. [2021-06-05 07:00:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15286 states, 15285 states have (on average 3.890677134445535) internal successors, (59469), 15285 states have internal predecessors, (59469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15286 states to 15286 states and 59469 transitions. [2021-06-05 07:00:20,272 INFO L78 Accepts]: Start accepts. Automaton has 15286 states and 59469 transitions. Word has length 28 [2021-06-05 07:00:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:20,272 INFO L482 AbstractCegarLoop]: Abstraction has 15286 states and 59469 transitions. [2021-06-05 07:00:20,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 15286 states and 59469 transitions. [2021-06-05 07:00:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:20,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:20,295 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:20,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:20,495 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:20,496 INFO L82 PathProgramCache]: Analyzing trace with hash -405698579, now seen corresponding path program 80 times [2021-06-05 07:00:20,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:20,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695672394] [2021-06-05 07:00:20,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:20,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:20,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695672394] [2021-06-05 07:00:20,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695672394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:20,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904180368] [2021-06-05 07:00:20,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:20,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:20,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:20,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:20,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:20,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904180368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:20,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:20,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:00:20,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086002363] [2021-06-05 07:00:20,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:00:20,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:20,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:00:20,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:00:20,673 INFO L87 Difference]: Start difference. First operand 15286 states and 59469 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:22,128 INFO L93 Difference]: Finished difference Result 38023 states and 137597 transitions. [2021-06-05 07:00:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 07:00:22,128 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:22,216 INFO L225 Difference]: With dead ends: 38023 [2021-06-05 07:00:22,216 INFO L226 Difference]: Without dead ends: 38023 [2021-06-05 07:00:22,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 898.4ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:00:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38023 states. [2021-06-05 07:00:22,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38023 to 15260. [2021-06-05 07:00:22,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15260 states, 15259 states have (on average 3.8870830329641524) internal successors, (59313), 15259 states have internal predecessors, (59313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15260 states to 15260 states and 59313 transitions. [2021-06-05 07:00:22,751 INFO L78 Accepts]: Start accepts. Automaton has 15260 states and 59313 transitions. Word has length 28 [2021-06-05 07:00:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:22,751 INFO L482 AbstractCegarLoop]: Abstraction has 15260 states and 59313 transitions. [2021-06-05 07:00:22,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:22,751 INFO L276 IsEmpty]: Start isEmpty. Operand 15260 states and 59313 transitions. [2021-06-05 07:00:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:22,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:22,774 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:22,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3589 [2021-06-05 07:00:22,974 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:22,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1649877491, now seen corresponding path program 115 times [2021-06-05 07:00:22,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:22,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849586427] [2021-06-05 07:00:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:23,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:23,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849586427] [2021-06-05 07:00:23,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849586427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:23,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11795143] [2021-06-05 07:00:23,011 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:23,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:23,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:23,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11795143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:23,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:23,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:00:23,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454675989] [2021-06-05 07:00:23,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:00:23,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:23,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:00:23,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:00:23,086 INFO L87 Difference]: Start difference. First operand 15260 states and 59313 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-05 07:00:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:23,425 INFO L93 Difference]: Finished difference Result 23613 states and 90414 transitions. [2021-06-05 07:00:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:00:23,425 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-06-05 07:00:23,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:23,482 INFO L225 Difference]: With dead ends: 23613 [2021-06-05 07:00:23,483 INFO L226 Difference]: Without dead ends: 23563 [2021-06-05 07:00:23,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:00:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23563 states. [2021-06-05 07:00:23,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23563 to 20372. [2021-06-05 07:00:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20372 states, 20371 states have (on average 3.902803004270777) internal successors, (79504), 20371 states have internal predecessors, (79504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20372 states to 20372 states and 79504 transitions. [2021-06-05 07:00:23,974 INFO L78 Accepts]: Start accepts. Automaton has 20372 states and 79504 transitions. Word has length 28 [2021-06-05 07:00:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:23,974 INFO L482 AbstractCegarLoop]: Abstraction has 20372 states and 79504 transitions. [2021-06-05 07:00:23,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-05 07:00:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 20372 states and 79504 transitions. [2021-06-05 07:00:24,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:24,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:24,010 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:24,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3590 [2021-06-05 07:00:24,211 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:24,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:24,211 INFO L82 PathProgramCache]: Analyzing trace with hash 260189251, now seen corresponding path program 116 times [2021-06-05 07:00:24,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:24,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543591029] [2021-06-05 07:00:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:24,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:24,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543591029] [2021-06-05 07:00:24,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543591029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:24,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614117869] [2021-06-05 07:00:24,242 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:24,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:24,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:24,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:24,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614117869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:24,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:24,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 07:00:24,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667398116] [2021-06-05 07:00:24,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:00:24,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:24,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:00:24,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:00:24,332 INFO L87 Difference]: Start difference. First operand 20372 states and 79504 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 07:00:24,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:24,563 INFO L93 Difference]: Finished difference Result 23123 states and 87862 transitions. [2021-06-05 07:00:24,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:00:24,563 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-05 07:00:24,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:24,611 INFO L225 Difference]: With dead ends: 23123 [2021-06-05 07:00:24,611 INFO L226 Difference]: Without dead ends: 23123 [2021-06-05 07:00:24,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:00:24,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23123 states. [2021-06-05 07:00:24,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23123 to 19875. [2021-06-05 07:00:24,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19875 states, 19874 states have (on average 3.891114018315387) internal successors, (77332), 19874 states have internal predecessors, (77332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:24,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19875 states to 19875 states and 77332 transitions. [2021-06-05 07:00:24,988 INFO L78 Accepts]: Start accepts. Automaton has 19875 states and 77332 transitions. Word has length 28 [2021-06-05 07:00:24,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:24,988 INFO L482 AbstractCegarLoop]: Abstraction has 19875 states and 77332 transitions. [2021-06-05 07:00:24,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 07:00:24,988 INFO L276 IsEmpty]: Start isEmpty. Operand 19875 states and 77332 transitions. [2021-06-05 07:00:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:25,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:25,017 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:25,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3591 [2021-06-05 07:00:25,217 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:25,217 INFO L82 PathProgramCache]: Analyzing trace with hash -691492187, now seen corresponding path program 117 times [2021-06-05 07:00:25,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:25,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116942803] [2021-06-05 07:00:25,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:25,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:25,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116942803] [2021-06-05 07:00:25,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116942803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:25,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517802613] [2021-06-05 07:00:25,252 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:25,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:00:25,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:25,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:25,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:25,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517802613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:25,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:25,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 07:00:25,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535972720] [2021-06-05 07:00:25,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:00:25,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:25,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:00:25,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:00:25,354 INFO L87 Difference]: Start difference. First operand 19875 states and 77332 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:26,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:26,228 INFO L93 Difference]: Finished difference Result 31643 states and 117215 transitions. [2021-06-05 07:00:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:00:26,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:26,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:26,302 INFO L225 Difference]: With dead ends: 31643 [2021-06-05 07:00:26,302 INFO L226 Difference]: Without dead ends: 31643 [2021-06-05 07:00:26,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 459.1ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:00:26,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31643 states. [2021-06-05 07:00:26,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31643 to 19937. [2021-06-05 07:00:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19937 states, 19936 states have (on average 3.889446227929374) internal successors, (77540), 19936 states have internal predecessors, (77540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19937 states to 19937 states and 77540 transitions. [2021-06-05 07:00:26,846 INFO L78 Accepts]: Start accepts. Automaton has 19937 states and 77540 transitions. Word has length 28 [2021-06-05 07:00:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:26,846 INFO L482 AbstractCegarLoop]: Abstraction has 19937 states and 77540 transitions. [2021-06-05 07:00:26,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:26,846 INFO L276 IsEmpty]: Start isEmpty. Operand 19937 states and 77540 transitions. [2021-06-05 07:00:26,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:26,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:26,874 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:27,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3592 [2021-06-05 07:00:27,075 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:27,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:27,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1667811031, now seen corresponding path program 118 times [2021-06-05 07:00:27,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:27,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552220403] [2021-06-05 07:00:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:27,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:27,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552220403] [2021-06-05 07:00:27,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552220403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:27,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384222495] [2021-06-05 07:00:27,112 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:27,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:27,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:27,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:27,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:27,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384222495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:27,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:27,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:00:27,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002573242] [2021-06-05 07:00:27,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:00:27,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:27,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:00:27,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:00:27,241 INFO L87 Difference]: Start difference. First operand 19937 states and 77540 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:28,774 INFO L93 Difference]: Finished difference Result 40452 states and 148213 transitions. [2021-06-05 07:00:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:00:28,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:28,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:28,874 INFO L225 Difference]: With dead ends: 40452 [2021-06-05 07:00:28,874 INFO L226 Difference]: Without dead ends: 40452 [2021-06-05 07:00:28,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 931.5ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 07:00:28,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40452 states. [2021-06-05 07:00:29,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40452 to 19942. [2021-06-05 07:00:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19942 states, 19941 states have (on average 3.891530013539943) internal successors, (77601), 19941 states have internal predecessors, (77601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19942 states to 19942 states and 77601 transitions. [2021-06-05 07:00:29,455 INFO L78 Accepts]: Start accepts. Automaton has 19942 states and 77601 transitions. Word has length 28 [2021-06-05 07:00:29,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:29,456 INFO L482 AbstractCegarLoop]: Abstraction has 19942 states and 77601 transitions. [2021-06-05 07:00:29,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:29,456 INFO L276 IsEmpty]: Start isEmpty. Operand 19942 states and 77601 transitions. [2021-06-05 07:00:29,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:29,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:29,488 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:29,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3593,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:29,708 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:29,708 INFO L82 PathProgramCache]: Analyzing trace with hash -138906387, now seen corresponding path program 119 times [2021-06-05 07:00:29,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:29,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411669658] [2021-06-05 07:00:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:29,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:29,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411669658] [2021-06-05 07:00:29,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411669658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:29,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135543855] [2021-06-05 07:00:29,759 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:29,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:00:29,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:29,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:29,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:29,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135543855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:29,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:29,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 07:00:29,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200443221] [2021-06-05 07:00:29,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:00:29,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:29,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:00:29,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:00:29,874 INFO L87 Difference]: Start difference. First operand 19942 states and 77601 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:31,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:31,404 INFO L93 Difference]: Finished difference Result 40013 states and 147353 transitions. [2021-06-05 07:00:31,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 07:00:31,405 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:31,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:31,505 INFO L225 Difference]: With dead ends: 40013 [2021-06-05 07:00:31,506 INFO L226 Difference]: Without dead ends: 40013 [2021-06-05 07:00:31,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 871.7ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 07:00:31,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40013 states. [2021-06-05 07:00:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40013 to 19730. [2021-06-05 07:00:32,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19730 states, 19729 states have (on average 3.8836230929089157) internal successors, (76620), 19729 states have internal predecessors, (76620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19730 states to 19730 states and 76620 transitions. [2021-06-05 07:00:32,064 INFO L78 Accepts]: Start accepts. Automaton has 19730 states and 76620 transitions. Word has length 28 [2021-06-05 07:00:32,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:32,064 INFO L482 AbstractCegarLoop]: Abstraction has 19730 states and 76620 transitions. [2021-06-05 07:00:32,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:32,064 INFO L276 IsEmpty]: Start isEmpty. Operand 19730 states and 76620 transitions. [2021-06-05 07:00:32,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:32,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:32,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:32,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3594 [2021-06-05 07:00:32,293 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:32,293 INFO L82 PathProgramCache]: Analyzing trace with hash -164720279, now seen corresponding path program 120 times [2021-06-05 07:00:32,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:32,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873004191] [2021-06-05 07:00:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:32,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:32,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873004191] [2021-06-05 07:00:32,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873004191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:32,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138909798] [2021-06-05 07:00:32,332 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:32,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:00:32,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:32,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:00:32,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:00:32,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138909798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:32,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:32,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 07:00:32,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975682223] [2021-06-05 07:00:32,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:00:32,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:32,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:00:32,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:00:32,413 INFO L87 Difference]: Start difference. First operand 19730 states and 76620 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:32,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:32,692 INFO L93 Difference]: Finished difference Result 29201 states and 109016 transitions. [2021-06-05 07:00:32,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:00:32,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:32,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:32,760 INFO L225 Difference]: With dead ends: 29201 [2021-06-05 07:00:32,760 INFO L226 Difference]: Without dead ends: 29184 [2021-06-05 07:00:32,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:00:32,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29184 states. [2021-06-05 07:00:33,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29184 to 19998. [2021-06-05 07:00:33,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19998 states, 19997 states have (on average 3.889183377506626) internal successors, (77772), 19997 states have internal predecessors, (77772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:33,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19998 states to 19998 states and 77772 transitions. [2021-06-05 07:00:33,215 INFO L78 Accepts]: Start accepts. Automaton has 19998 states and 77772 transitions. Word has length 28 [2021-06-05 07:00:33,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:33,215 INFO L482 AbstractCegarLoop]: Abstraction has 19998 states and 77772 transitions. [2021-06-05 07:00:33,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:33,216 INFO L276 IsEmpty]: Start isEmpty. Operand 19998 states and 77772 transitions. [2021-06-05 07:00:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:33,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:33,245 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:33,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-06-05 07:00:33,446 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:33,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:33,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1307646319, now seen corresponding path program 121 times [2021-06-05 07:00:33,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:33,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733552239] [2021-06-05 07:00:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:33,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:33,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733552239] [2021-06-05 07:00:33,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733552239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:33,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74134500] [2021-06-05 07:00:33,485 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:33,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:00:33,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:00:33,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74134500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:33,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:33,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 07:00:33,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954842817] [2021-06-05 07:00:33,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:00:33,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:33,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:00:33,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:00:33,579 INFO L87 Difference]: Start difference. First operand 19998 states and 77772 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:34,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:34,013 INFO L93 Difference]: Finished difference Result 30984 states and 114572 transitions. [2021-06-05 07:00:34,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:00:34,014 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:34,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:34,087 INFO L225 Difference]: With dead ends: 30984 [2021-06-05 07:00:34,088 INFO L226 Difference]: Without dead ends: 30984 [2021-06-05 07:00:34,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:00:34,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30984 states. [2021-06-05 07:00:34,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30984 to 19667. [2021-06-05 07:00:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19667 states, 19666 states have (on average 3.8739957286687683) internal successors, (76186), 19666 states have internal predecessors, (76186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19667 states to 19667 states and 76186 transitions. [2021-06-05 07:00:34,561 INFO L78 Accepts]: Start accepts. Automaton has 19667 states and 76186 transitions. Word has length 28 [2021-06-05 07:00:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:34,561 INFO L482 AbstractCegarLoop]: Abstraction has 19667 states and 76186 transitions. [2021-06-05 07:00:34,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 19667 states and 76186 transitions. [2021-06-05 07:00:34,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:34,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:34,591 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:34,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3596,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:34,791 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:34,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1640639411, now seen corresponding path program 122 times [2021-06-05 07:00:34,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:34,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993380983] [2021-06-05 07:00:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:34,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:34,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993380983] [2021-06-05 07:00:34,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993380983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:34,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217471111] [2021-06-05 07:00:34,826 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:34,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:34,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:34,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:34,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:34,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217471111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:34,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:34,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:00:34,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658068265] [2021-06-05 07:00:34,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:00:34,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:34,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:00:34,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:00:34,920 INFO L87 Difference]: Start difference. First operand 19667 states and 76186 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:35,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:35,694 INFO L93 Difference]: Finished difference Result 29160 states and 108410 transitions. [2021-06-05 07:00:35,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 07:00:35,695 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:35,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:35,769 INFO L225 Difference]: With dead ends: 29160 [2021-06-05 07:00:35,770 INFO L226 Difference]: Without dead ends: 29160 [2021-06-05 07:00:35,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 402.5ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:00:35,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29160 states. [2021-06-05 07:00:36,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29160 to 19711. [2021-06-05 07:00:36,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19711 states, 19710 states have (on average 3.8728564180618976) internal successors, (76334), 19710 states have internal predecessors, (76334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19711 states to 19711 states and 76334 transitions. [2021-06-05 07:00:36,279 INFO L78 Accepts]: Start accepts. Automaton has 19711 states and 76334 transitions. Word has length 28 [2021-06-05 07:00:36,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:36,279 INFO L482 AbstractCegarLoop]: Abstraction has 19711 states and 76334 transitions. [2021-06-05 07:00:36,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:36,279 INFO L276 IsEmpty]: Start isEmpty. Operand 19711 states and 76334 transitions. [2021-06-05 07:00:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:36,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:36,312 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:36,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3597,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:36,528 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:36,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:36,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1869413791, now seen corresponding path program 123 times [2021-06-05 07:00:36,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:36,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623122580] [2021-06-05 07:00:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:36,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:36,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623122580] [2021-06-05 07:00:36,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623122580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:36,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881344752] [2021-06-05 07:00:36,588 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:36,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:00:36,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:36,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:36,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:36,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881344752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:36,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:36,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:00:36,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866645097] [2021-06-05 07:00:36,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:00:36,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:36,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:00:36,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:00:36,696 INFO L87 Difference]: Start difference. First operand 19711 states and 76334 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:37,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:37,739 INFO L93 Difference]: Finished difference Result 30658 states and 112697 transitions. [2021-06-05 07:00:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 07:00:37,739 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:37,818 INFO L225 Difference]: With dead ends: 30658 [2021-06-05 07:00:37,818 INFO L226 Difference]: Without dead ends: 30658 [2021-06-05 07:00:37,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 613.7ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:00:37,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30658 states. [2021-06-05 07:00:38,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30658 to 20243. [2021-06-05 07:00:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20243 states, 20242 states have (on average 3.8518921055231696) internal successors, (77970), 20242 states have internal predecessors, (77970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20243 states to 20243 states and 77970 transitions. [2021-06-05 07:00:38,380 INFO L78 Accepts]: Start accepts. Automaton has 20243 states and 77970 transitions. Word has length 28 [2021-06-05 07:00:38,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:38,380 INFO L482 AbstractCegarLoop]: Abstraction has 20243 states and 77970 transitions. [2021-06-05 07:00:38,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 20243 states and 77970 transitions. [2021-06-05 07:00:38,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:38,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:38,412 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:38,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:38,628 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:38,629 INFO L82 PathProgramCache]: Analyzing trace with hash -923294047, now seen corresponding path program 124 times [2021-06-05 07:00:38,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:38,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880431562] [2021-06-05 07:00:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:38,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:38,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880431562] [2021-06-05 07:00:38,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880431562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:38,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062347016] [2021-06-05 07:00:38,664 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:38,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:38,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:38,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:38,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:38,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062347016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:38,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:38,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 07:00:38,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797800264] [2021-06-05 07:00:38,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:00:38,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:38,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:00:38,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:00:38,755 INFO L87 Difference]: Start difference. First operand 20243 states and 77970 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:39,659 INFO L93 Difference]: Finished difference Result 29767 states and 110352 transitions. [2021-06-05 07:00:39,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:00:39,659 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:39,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:39,734 INFO L225 Difference]: With dead ends: 29767 [2021-06-05 07:00:39,735 INFO L226 Difference]: Without dead ends: 29763 [2021-06-05 07:00:39,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 456.5ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:00:39,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29763 states. [2021-06-05 07:00:40,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29763 to 20135. [2021-06-05 07:00:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20135 states, 20134 states have (on average 3.854773020760902) internal successors, (77612), 20134 states have internal predecessors, (77612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20135 states to 20135 states and 77612 transitions. [2021-06-05 07:00:40,238 INFO L78 Accepts]: Start accepts. Automaton has 20135 states and 77612 transitions. Word has length 28 [2021-06-05 07:00:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:40,238 INFO L482 AbstractCegarLoop]: Abstraction has 20135 states and 77612 transitions. [2021-06-05 07:00:40,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 20135 states and 77612 transitions. [2021-06-05 07:00:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:40,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:40,269 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:40,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3599,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:40,485 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1048850995, now seen corresponding path program 125 times [2021-06-05 07:00:40,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:40,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032185970] [2021-06-05 07:00:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:40,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:40,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032185970] [2021-06-05 07:00:40,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032185970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:40,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708256785] [2021-06-05 07:00:40,518 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:40,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:00:40,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:40,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:00:40,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:00:40,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708256785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:40,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:40,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 07:00:40,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502045982] [2021-06-05 07:00:40,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:00:40,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:40,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:00:40,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:00:40,595 INFO L87 Difference]: Start difference. First operand 20135 states and 77612 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:40,831 INFO L93 Difference]: Finished difference Result 25115 states and 93450 transitions. [2021-06-05 07:00:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 07:00:40,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:41,030 INFO L225 Difference]: With dead ends: 25115 [2021-06-05 07:00:41,031 INFO L226 Difference]: Without dead ends: 25115 [2021-06-05 07:00:41,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:00:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25115 states. [2021-06-05 07:00:41,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25115 to 20445. [2021-06-05 07:00:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20445 states, 20444 states have (on average 3.845871649383682) internal successors, (78625), 20444 states have internal predecessors, (78625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:41,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20445 states to 20445 states and 78625 transitions. [2021-06-05 07:00:41,391 INFO L78 Accepts]: Start accepts. Automaton has 20445 states and 78625 transitions. Word has length 28 [2021-06-05 07:00:41,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:41,392 INFO L482 AbstractCegarLoop]: Abstraction has 20445 states and 78625 transitions. [2021-06-05 07:00:41,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:41,392 INFO L276 IsEmpty]: Start isEmpty. Operand 20445 states and 78625 transitions. [2021-06-05 07:00:41,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:41,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:41,422 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:41,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3600,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:41,623 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:41,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:41,623 INFO L82 PathProgramCache]: Analyzing trace with hash -118651251, now seen corresponding path program 126 times [2021-06-05 07:00:41,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:41,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821912636] [2021-06-05 07:00:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:41,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:41,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821912636] [2021-06-05 07:00:41,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821912636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:41,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266914342] [2021-06-05 07:00:41,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:41,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:00:41,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:41,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:41,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:00:41,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266914342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:41,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:41,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:00:41,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034501608] [2021-06-05 07:00:41,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:41,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:41,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:41,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:41,745 INFO L87 Difference]: Start difference. First operand 20445 states and 78625 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 07:00:42,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:42,544 INFO L93 Difference]: Finished difference Result 30869 states and 113082 transitions. [2021-06-05 07:00:42,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:00:42,544 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:00:42,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:42,613 INFO L225 Difference]: With dead ends: 30869 [2021-06-05 07:00:42,614 INFO L226 Difference]: Without dead ends: 30869 [2021-06-05 07:00:42,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 426.9ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:00:42,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30869 states. [2021-06-05 07:00:43,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30869 to 22051. [2021-06-05 07:00:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22051 states, 22050 states have (on average 3.8592743764172335) internal successors, (85097), 22050 states have internal predecessors, (85097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22051 states to 22051 states and 85097 transitions. [2021-06-05 07:00:43,142 INFO L78 Accepts]: Start accepts. Automaton has 22051 states and 85097 transitions. Word has length 28 [2021-06-05 07:00:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:43,142 INFO L482 AbstractCegarLoop]: Abstraction has 22051 states and 85097 transitions. [2021-06-05 07:00:43,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 07:00:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 22051 states and 85097 transitions. [2021-06-05 07:00:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:43,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:43,174 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:43,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3601 [2021-06-05 07:00:43,374 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:43,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:43,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1808445805, now seen corresponding path program 127 times [2021-06-05 07:00:43,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:43,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037367122] [2021-06-05 07:00:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:43,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:43,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037367122] [2021-06-05 07:00:43,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037367122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:43,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760580694] [2021-06-05 07:00:43,412 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:43,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:43,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:00:43,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760580694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:43,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:43,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:00:43,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510114648] [2021-06-05 07:00:43,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:43,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:43,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:43,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:43,525 INFO L87 Difference]: Start difference. First operand 22051 states and 85097 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 07:00:44,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:44,207 INFO L93 Difference]: Finished difference Result 29083 states and 108458 transitions. [2021-06-05 07:00:44,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:00:44,207 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:00:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:44,274 INFO L225 Difference]: With dead ends: 29083 [2021-06-05 07:00:44,274 INFO L226 Difference]: Without dead ends: 29071 [2021-06-05 07:00:44,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:00:44,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29071 states. [2021-06-05 07:00:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29071 to 22169. [2021-06-05 07:00:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22169 states, 22168 states have (on average 3.854655359076146) internal successors, (85450), 22168 states have internal predecessors, (85450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:44,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22169 states to 22169 states and 85450 transitions. [2021-06-05 07:00:44,877 INFO L78 Accepts]: Start accepts. Automaton has 22169 states and 85450 transitions. Word has length 28 [2021-06-05 07:00:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:44,877 INFO L482 AbstractCegarLoop]: Abstraction has 22169 states and 85450 transitions. [2021-06-05 07:00:44,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 07:00:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 22169 states and 85450 transitions. [2021-06-05 07:00:44,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:44,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:44,908 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:45,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3602,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:45,109 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:45,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1705760401, now seen corresponding path program 128 times [2021-06-05 07:00:45,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:45,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756677016] [2021-06-05 07:00:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:45,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:45,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756677016] [2021-06-05 07:00:45,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756677016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:45,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054894107] [2021-06-05 07:00:45,137 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:45,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:45,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:45,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 07:00:45,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:45,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054894107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:45,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:45,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 07:00:45,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732915731] [2021-06-05 07:00:45,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 07:00:45,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:45,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 07:00:45,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:00:45,209 INFO L87 Difference]: Start difference. First operand 22169 states and 85450 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-06-05 07:00:45,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:45,440 INFO L93 Difference]: Finished difference Result 25428 states and 96407 transitions. [2021-06-05 07:00:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:00:45,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 28 [2021-06-05 07:00:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:45,494 INFO L225 Difference]: With dead ends: 25428 [2021-06-05 07:00:45,494 INFO L226 Difference]: Without dead ends: 25428 [2021-06-05 07:00:45,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:00:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25428 states. [2021-06-05 07:00:45,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25428 to 22972. [2021-06-05 07:00:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22972 states, 22971 states have (on average 3.84959296504288) internal successors, (88429), 22971 states have internal predecessors, (88429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22972 states to 22972 states and 88429 transitions. [2021-06-05 07:00:45,938 INFO L78 Accepts]: Start accepts. Automaton has 22972 states and 88429 transitions. Word has length 28 [2021-06-05 07:00:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:45,938 INFO L482 AbstractCegarLoop]: Abstraction has 22972 states and 88429 transitions. [2021-06-05 07:00:45,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-06-05 07:00:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 22972 states and 88429 transitions. [2021-06-05 07:00:45,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:45,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:45,984 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:46,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3603 [2021-06-05 07:00:46,197 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:46,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2145545327, now seen corresponding path program 129 times [2021-06-05 07:00:46,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:46,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18475944] [2021-06-05 07:00:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:46,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:46,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18475944] [2021-06-05 07:00:46,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18475944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:46,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781538134] [2021-06-05 07:00:46,238 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:46,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:00:46,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:46,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:46,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:46,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781538134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:46,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:46,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:00:46,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168912026] [2021-06-05 07:00:46,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:00:46,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:46,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:00:46,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:00:46,329 INFO L87 Difference]: Start difference. First operand 22972 states and 88429 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-05 07:00:47,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:47,069 INFO L93 Difference]: Finished difference Result 30839 states and 113843 transitions. [2021-06-05 07:00:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:00:47,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 07:00:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:47,139 INFO L225 Difference]: With dead ends: 30839 [2021-06-05 07:00:47,140 INFO L226 Difference]: Without dead ends: 30839 [2021-06-05 07:00:47,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 408.4ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:00:47,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30839 states. [2021-06-05 07:00:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30839 to 24204. [2021-06-05 07:00:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24204 states, 24203 states have (on average 3.8153534685782753) internal successors, (92343), 24203 states have internal predecessors, (92343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:47,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24204 states to 24204 states and 92343 transitions. [2021-06-05 07:00:47,842 INFO L78 Accepts]: Start accepts. Automaton has 24204 states and 92343 transitions. Word has length 28 [2021-06-05 07:00:47,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:47,843 INFO L482 AbstractCegarLoop]: Abstraction has 24204 states and 92343 transitions. [2021-06-05 07:00:47,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-05 07:00:47,843 INFO L276 IsEmpty]: Start isEmpty. Operand 24204 states and 92343 transitions. [2021-06-05 07:00:47,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:47,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:47,885 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:48,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3604 [2021-06-05 07:00:48,086 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:48,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:48,086 INFO L82 PathProgramCache]: Analyzing trace with hash -414511489, now seen corresponding path program 130 times [2021-06-05 07:00:48,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:48,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167856643] [2021-06-05 07:00:48,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:48,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:48,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167856643] [2021-06-05 07:00:48,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167856643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:48,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792061684] [2021-06-05 07:00:48,122 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:48,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:48,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:48,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792061684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:48,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:48,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:00:48,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904674515] [2021-06-05 07:00:48,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:00:48,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:48,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:00:48,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:00:48,224 INFO L87 Difference]: Start difference. First operand 24204 states and 92343 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:48,861 INFO L93 Difference]: Finished difference Result 29939 states and 111457 transitions. [2021-06-05 07:00:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:00:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:48,933 INFO L225 Difference]: With dead ends: 29939 [2021-06-05 07:00:48,933 INFO L226 Difference]: Without dead ends: 29931 [2021-06-05 07:00:48,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:00:48,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29931 states. [2021-06-05 07:00:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29931 to 24026. [2021-06-05 07:00:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24026 states, 24025 states have (on average 3.821685744016649) internal successors, (91816), 24025 states have internal predecessors, (91816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24026 states to 24026 states and 91816 transitions. [2021-06-05 07:00:49,459 INFO L78 Accepts]: Start accepts. Automaton has 24026 states and 91816 transitions. Word has length 28 [2021-06-05 07:00:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:49,459 INFO L482 AbstractCegarLoop]: Abstraction has 24026 states and 91816 transitions. [2021-06-05 07:00:49,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:49,459 INFO L276 IsEmpty]: Start isEmpty. Operand 24026 states and 91816 transitions. [2021-06-05 07:00:49,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:49,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:49,497 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:49,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3605,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:49,697 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:49,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:49,698 INFO L82 PathProgramCache]: Analyzing trace with hash 44544553, now seen corresponding path program 131 times [2021-06-05 07:00:49,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:49,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63228295] [2021-06-05 07:00:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:49,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:49,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63228295] [2021-06-05 07:00:49,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63228295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:49,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212844887] [2021-06-05 07:00:49,730 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:49,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:00:49,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:49,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:49,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:49,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212844887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:49,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:49,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:00:49,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645740632] [2021-06-05 07:00:49,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:00:49,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:49,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:00:49,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:00:49,816 INFO L87 Difference]: Start difference. First operand 24026 states and 91816 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:50,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:50,577 INFO L93 Difference]: Finished difference Result 31774 states and 117062 transitions. [2021-06-05 07:00:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:00:50,577 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:50,651 INFO L225 Difference]: With dead ends: 31774 [2021-06-05 07:00:50,651 INFO L226 Difference]: Without dead ends: 31774 [2021-06-05 07:00:50,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:00:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31774 states. [2021-06-05 07:00:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31774 to 25062. [2021-06-05 07:00:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25062 states, 25061 states have (on average 3.796416743146722) internal successors, (95142), 25061 states have internal predecessors, (95142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25062 states to 25062 states and 95142 transitions. [2021-06-05 07:00:51,344 INFO L78 Accepts]: Start accepts. Automaton has 25062 states and 95142 transitions. Word has length 28 [2021-06-05 07:00:51,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:51,344 INFO L482 AbstractCegarLoop]: Abstraction has 25062 states and 95142 transitions. [2021-06-05 07:00:51,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 25062 states and 95142 transitions. [2021-06-05 07:00:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:51,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:51,380 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:51,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3606 [2021-06-05 07:00:51,580 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:51,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1038478103, now seen corresponding path program 132 times [2021-06-05 07:00:51,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:51,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860950167] [2021-06-05 07:00:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:51,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:51,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860950167] [2021-06-05 07:00:51,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860950167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:51,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720935167] [2021-06-05 07:00:51,613 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:51,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:00:51,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:51,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:51,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:51,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720935167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:51,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:51,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 07:00:51,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965796463] [2021-06-05 07:00:51,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:00:51,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:51,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:00:51,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:00:51,696 INFO L87 Difference]: Start difference. First operand 25062 states and 95142 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 07:00:52,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:52,113 INFO L93 Difference]: Finished difference Result 30731 states and 115778 transitions. [2021-06-05 07:00:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:00:52,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-05 07:00:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:52,183 INFO L225 Difference]: With dead ends: 30731 [2021-06-05 07:00:52,183 INFO L226 Difference]: Without dead ends: 30718 [2021-06-05 07:00:52,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:00:52,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30718 states. [2021-06-05 07:00:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30718 to 29185. [2021-06-05 07:00:52,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29185 states, 29184 states have (on average 3.8150356359649122) internal successors, (111338), 29184 states have internal predecessors, (111338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:52,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29185 states to 29185 states and 111338 transitions. [2021-06-05 07:00:52,793 INFO L78 Accepts]: Start accepts. Automaton has 29185 states and 111338 transitions. Word has length 28 [2021-06-05 07:00:52,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:52,793 INFO L482 AbstractCegarLoop]: Abstraction has 29185 states and 111338 transitions. [2021-06-05 07:00:52,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 07:00:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 29185 states and 111338 transitions. [2021-06-05 07:00:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:52,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:52,840 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:53,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3607,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:53,041 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:53,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:53,041 INFO L82 PathProgramCache]: Analyzing trace with hash 432600015, now seen corresponding path program 133 times [2021-06-05 07:00:53,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:53,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786882681] [2021-06-05 07:00:53,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:53,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:53,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786882681] [2021-06-05 07:00:53,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786882681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:53,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921207377] [2021-06-05 07:00:53,073 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:53,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:53,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:53,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921207377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:53,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:53,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 07:00:53,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140654133] [2021-06-05 07:00:53,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:00:53,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:53,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:00:53,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:00:53,149 INFO L87 Difference]: Start difference. First operand 29185 states and 111338 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 07:00:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:53,490 INFO L93 Difference]: Finished difference Result 32194 states and 120690 transitions. [2021-06-05 07:00:53,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:00:53,490 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-05 07:00:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:53,562 INFO L225 Difference]: With dead ends: 32194 [2021-06-05 07:00:53,562 INFO L226 Difference]: Without dead ends: 32194 [2021-06-05 07:00:53,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:00:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32194 states. [2021-06-05 07:00:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32194 to 28930. [2021-06-05 07:00:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28930 states, 28929 states have (on average 3.8113657575443325) internal successors, (110259), 28929 states have internal predecessors, (110259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28930 states to 28930 states and 110259 transitions. [2021-06-05 07:00:54,167 INFO L78 Accepts]: Start accepts. Automaton has 28930 states and 110259 transitions. Word has length 28 [2021-06-05 07:00:54,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:54,167 INFO L482 AbstractCegarLoop]: Abstraction has 28930 states and 110259 transitions. [2021-06-05 07:00:54,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 07:00:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 28930 states and 110259 transitions. [2021-06-05 07:00:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:54,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:54,218 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:54,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-06-05 07:00:54,421 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:54,421 INFO L82 PathProgramCache]: Analyzing trace with hash 990664297, now seen corresponding path program 134 times [2021-06-05 07:00:54,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:54,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79764816] [2021-06-05 07:00:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:54,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:54,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79764816] [2021-06-05 07:00:54,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79764816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:54,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041177104] [2021-06-05 07:00:54,451 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:54,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:54,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:54,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:54,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:54,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041177104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:54,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:54,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:00:54,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604822604] [2021-06-05 07:00:54,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:00:54,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:54,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:00:54,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:00:54,534 INFO L87 Difference]: Start difference. First operand 28930 states and 110259 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:55,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:55,278 INFO L93 Difference]: Finished difference Result 35356 states and 131587 transitions. [2021-06-05 07:00:55,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:00:55,278 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:55,378 INFO L225 Difference]: With dead ends: 35356 [2021-06-05 07:00:55,378 INFO L226 Difference]: Without dead ends: 35348 [2021-06-05 07:00:55,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 385.1ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:00:55,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35348 states. [2021-06-05 07:00:55,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35348 to 28896. [2021-06-05 07:00:55,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28896 states, 28895 states have (on average 3.8118013497144836) internal successors, (110142), 28895 states have internal predecessors, (110142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28896 states to 28896 states and 110142 transitions. [2021-06-05 07:00:56,067 INFO L78 Accepts]: Start accepts. Automaton has 28896 states and 110142 transitions. Word has length 28 [2021-06-05 07:00:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:56,067 INFO L482 AbstractCegarLoop]: Abstraction has 28896 states and 110142 transitions. [2021-06-05 07:00:56,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 28896 states and 110142 transitions. [2021-06-05 07:00:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:56,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:56,117 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:56,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3609,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:56,333 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:56,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:56,333 INFO L82 PathProgramCache]: Analyzing trace with hash -896097405, now seen corresponding path program 135 times [2021-06-05 07:00:56,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:56,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360978805] [2021-06-05 07:00:56,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:56,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:56,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360978805] [2021-06-05 07:00:56,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360978805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:56,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760738547] [2021-06-05 07:00:56,364 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:56,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:00:56,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:56,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:56,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:56,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760738547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:56,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:56,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 07:00:56,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607340750] [2021-06-05 07:00:56,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:00:56,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:56,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:00:56,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:00:56,440 INFO L87 Difference]: Start difference. First operand 28896 states and 110142 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 07:00:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:56,843 INFO L93 Difference]: Finished difference Result 31746 states and 119616 transitions. [2021-06-05 07:00:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:00:56,843 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-05 07:00:56,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:56,917 INFO L225 Difference]: With dead ends: 31746 [2021-06-05 07:00:56,917 INFO L226 Difference]: Without dead ends: 31746 [2021-06-05 07:00:56,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:00:56,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31746 states. [2021-06-05 07:00:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31746 to 29428. [2021-06-05 07:00:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29428 states, 29427 states have (on average 3.81031025928569) internal successors, (112126), 29427 states have internal predecessors, (112126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29428 states to 29428 states and 112126 transitions. [2021-06-05 07:00:57,521 INFO L78 Accepts]: Start accepts. Automaton has 29428 states and 112126 transitions. Word has length 28 [2021-06-05 07:00:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:57,521 INFO L482 AbstractCegarLoop]: Abstraction has 29428 states and 112126 transitions. [2021-06-05 07:00:57,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 07:00:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 29428 states and 112126 transitions. [2021-06-05 07:00:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:57,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:57,573 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:57,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3610,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:57,773 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:57,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:57,774 INFO L82 PathProgramCache]: Analyzing trace with hash 68962157, now seen corresponding path program 136 times [2021-06-05 07:00:57,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:57,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956746841] [2021-06-05 07:00:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:57,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:57,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956746841] [2021-06-05 07:00:57,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956746841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:57,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814596766] [2021-06-05 07:00:57,806 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:57,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:57,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:57,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:00:57,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:57,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814596766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:57,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:57,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 07:00:57,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038213414] [2021-06-05 07:00:57,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:00:57,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:57,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:00:57,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:00:57,882 INFO L87 Difference]: Start difference. First operand 29428 states and 112126 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:58,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:58,612 INFO L93 Difference]: Finished difference Result 36274 states and 134973 transitions. [2021-06-05 07:00:58,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:00:58,612 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:00:58,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:58,685 INFO L225 Difference]: With dead ends: 36274 [2021-06-05 07:00:58,685 INFO L226 Difference]: Without dead ends: 36250 [2021-06-05 07:00:58,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 270.7ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:00:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36250 states. [2021-06-05 07:00:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36250 to 29600. [2021-06-05 07:00:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29600 states, 29599 states have (on average 3.8062096692455825) internal successors, (112660), 29599 states have internal predecessors, (112660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29600 states to 29600 states and 112660 transitions. [2021-06-05 07:00:59,312 INFO L78 Accepts]: Start accepts. Automaton has 29600 states and 112660 transitions. Word has length 28 [2021-06-05 07:00:59,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:59,312 INFO L482 AbstractCegarLoop]: Abstraction has 29600 states and 112660 transitions. [2021-06-05 07:00:59,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:59,312 INFO L276 IsEmpty]: Start isEmpty. Operand 29600 states and 112660 transitions. [2021-06-05 07:00:59,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:00:59,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:59,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:59,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3611 [2021-06-05 07:00:59,560 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:59,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:59,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1253949625, now seen corresponding path program 137 times [2021-06-05 07:00:59,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:59,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180801016] [2021-06-05 07:00:59,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:59,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:59,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180801016] [2021-06-05 07:00:59,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180801016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:59,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904799505] [2021-06-05 07:00:59,598 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:59,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:00:59,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:59,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:00:59,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:59,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904799505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:59,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:59,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 07:00:59,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317971039] [2021-06-05 07:00:59,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:00:59,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:59,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:00:59,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:00:59,671 INFO L87 Difference]: Start difference. First operand 29600 states and 112660 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-05 07:01:00,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:00,136 INFO L93 Difference]: Finished difference Result 32160 states and 121084 transitions. [2021-06-05 07:01:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:01:00,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-06-05 07:01:00,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:00,212 INFO L225 Difference]: With dead ends: 32160 [2021-06-05 07:01:00,212 INFO L226 Difference]: Without dead ends: 32160 [2021-06-05 07:01:00,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:01:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32160 states. [2021-06-05 07:01:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32160 to 29526. [2021-06-05 07:01:00,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29526 states, 29525 states have (on average 3.807078746824725) internal successors, (112404), 29525 states have internal predecessors, (112404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29526 states to 29526 states and 112404 transitions. [2021-06-05 07:01:00,803 INFO L78 Accepts]: Start accepts. Automaton has 29526 states and 112404 transitions. Word has length 28 [2021-06-05 07:01:00,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:00,803 INFO L482 AbstractCegarLoop]: Abstraction has 29526 states and 112404 transitions. [2021-06-05 07:01:00,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-05 07:01:00,804 INFO L276 IsEmpty]: Start isEmpty. Operand 29526 states and 112404 transitions. [2021-06-05 07:01:00,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:00,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:00,851 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:01,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3612,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:01,052 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:01,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:01,052 INFO L82 PathProgramCache]: Analyzing trace with hash -719397267, now seen corresponding path program 138 times [2021-06-05 07:01:01,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:01,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735362218] [2021-06-05 07:01:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:01,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:01,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735362218] [2021-06-05 07:01:01,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735362218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:01,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106647473] [2021-06-05 07:01:01,088 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:01,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:01:01,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:01,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:01,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:01,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106647473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:01,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:01,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 07:01:01,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116131201] [2021-06-05 07:01:01,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:01:01,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:01,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:01:01,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:01:01,166 INFO L87 Difference]: Start difference. First operand 29526 states and 112404 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-05 07:01:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:01,786 INFO L93 Difference]: Finished difference Result 36197 states and 134714 transitions. [2021-06-05 07:01:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:01:01,787 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 07:01:01,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:01,867 INFO L225 Difference]: With dead ends: 36197 [2021-06-05 07:01:01,868 INFO L226 Difference]: Without dead ends: 36157 [2021-06-05 07:01:01,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:01:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36157 states. [2021-06-05 07:01:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36157 to 29682. [2021-06-05 07:01:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29682 states, 29681 states have (on average 3.8031737475152454) internal successors, (112882), 29681 states have internal predecessors, (112882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29682 states to 29682 states and 112882 transitions. [2021-06-05 07:01:02,765 INFO L78 Accepts]: Start accepts. Automaton has 29682 states and 112882 transitions. Word has length 28 [2021-06-05 07:01:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:02,765 INFO L482 AbstractCegarLoop]: Abstraction has 29682 states and 112882 transitions. [2021-06-05 07:01:02,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-05 07:01:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 29682 states and 112882 transitions. [2021-06-05 07:01:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:02,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:02,819 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:03,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3613 [2021-06-05 07:01:03,019 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:03,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:03,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1643440553, now seen corresponding path program 139 times [2021-06-05 07:01:03,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:03,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400223110] [2021-06-05 07:01:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:03,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:03,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400223110] [2021-06-05 07:01:03,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400223110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:03,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621365691] [2021-06-05 07:01:03,057 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:03,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:03,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:03,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621365691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:03,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:03,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:01:03,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874913860] [2021-06-05 07:01:03,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:01:03,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:03,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:01:03,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:01:03,182 INFO L87 Difference]: Start difference. First operand 29682 states and 112882 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:04,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:04,405 INFO L93 Difference]: Finished difference Result 67954 states and 250170 transitions. [2021-06-05 07:01:04,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:01:04,405 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:04,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:04,586 INFO L225 Difference]: With dead ends: 67954 [2021-06-05 07:01:04,587 INFO L226 Difference]: Without dead ends: 67954 [2021-06-05 07:01:04,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 640.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:01:04,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67954 states. [2021-06-05 07:01:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67954 to 37388. [2021-06-05 07:01:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37388 states, 37387 states have (on average 3.884772781983042) internal successors, (145240), 37387 states have internal predecessors, (145240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37388 states to 37388 states and 145240 transitions. [2021-06-05 07:01:05,795 INFO L78 Accepts]: Start accepts. Automaton has 37388 states and 145240 transitions. Word has length 28 [2021-06-05 07:01:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:05,795 INFO L482 AbstractCegarLoop]: Abstraction has 37388 states and 145240 transitions. [2021-06-05 07:01:05,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:05,796 INFO L276 IsEmpty]: Start isEmpty. Operand 37388 states and 145240 transitions. [2021-06-05 07:01:05,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:05,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:05,855 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:06,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3614,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:06,056 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:06,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1122622099, now seen corresponding path program 140 times [2021-06-05 07:01:06,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:06,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747404430] [2021-06-05 07:01:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:06,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:06,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747404430] [2021-06-05 07:01:06,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747404430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:06,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568164188] [2021-06-05 07:01:06,091 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:06,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:06,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:06,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:06,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:06,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568164188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:06,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:06,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:01:06,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809296959] [2021-06-05 07:01:06,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:01:06,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:06,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:01:06,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:01:06,414 INFO L87 Difference]: Start difference. First operand 37388 states and 145240 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:07,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:07,726 INFO L93 Difference]: Finished difference Result 67327 states and 248511 transitions. [2021-06-05 07:01:07,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:01:07,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:07,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:07,910 INFO L225 Difference]: With dead ends: 67327 [2021-06-05 07:01:07,910 INFO L226 Difference]: Without dead ends: 67327 [2021-06-05 07:01:07,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 877.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:01:07,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67327 states. [2021-06-05 07:01:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67327 to 37385. [2021-06-05 07:01:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37385 states, 37384 states have (on average 3.8847100363791998) internal successors, (145226), 37384 states have internal predecessors, (145226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:09,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37385 states to 37385 states and 145226 transitions. [2021-06-05 07:01:09,104 INFO L78 Accepts]: Start accepts. Automaton has 37385 states and 145226 transitions. Word has length 28 [2021-06-05 07:01:09,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:09,105 INFO L482 AbstractCegarLoop]: Abstraction has 37385 states and 145226 transitions. [2021-06-05 07:01:09,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:09,105 INFO L276 IsEmpty]: Start isEmpty. Operand 37385 states and 145226 transitions. [2021-06-05 07:01:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:09,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:09,162 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:09,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3615,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:09,363 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:09,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1038046775, now seen corresponding path program 141 times [2021-06-05 07:01:09,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:09,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94750299] [2021-06-05 07:01:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:09,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:09,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94750299] [2021-06-05 07:01:09,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94750299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:09,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770199791] [2021-06-05 07:01:09,393 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:09,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:01:09,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:09,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:09,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:09,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770199791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:09,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:09,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:01:09,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156172056] [2021-06-05 07:01:09,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:01:09,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:09,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:01:09,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:01:09,506 INFO L87 Difference]: Start difference. First operand 37385 states and 145226 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:10,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:10,725 INFO L93 Difference]: Finished difference Result 62746 states and 233002 transitions. [2021-06-05 07:01:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 07:01:10,726 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:10,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:10,885 INFO L225 Difference]: With dead ends: 62746 [2021-06-05 07:01:10,886 INFO L226 Difference]: Without dead ends: 62746 [2021-06-05 07:01:10,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 660.9ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:01:10,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62746 states. [2021-06-05 07:01:11,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62746 to 37407. [2021-06-05 07:01:11,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37407 states, 37406 states have (on average 3.8850184462385715) internal successors, (145323), 37406 states have internal predecessors, (145323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37407 states to 37407 states and 145323 transitions. [2021-06-05 07:01:12,003 INFO L78 Accepts]: Start accepts. Automaton has 37407 states and 145323 transitions. Word has length 28 [2021-06-05 07:01:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:12,003 INFO L482 AbstractCegarLoop]: Abstraction has 37407 states and 145323 transitions. [2021-06-05 07:01:12,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand 37407 states and 145323 transitions. [2021-06-05 07:01:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:12,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:12,061 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:12,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3616 [2021-06-05 07:01:12,261 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:12,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:12,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2110363749, now seen corresponding path program 142 times [2021-06-05 07:01:12,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:12,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628438379] [2021-06-05 07:01:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:12,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:12,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628438379] [2021-06-05 07:01:12,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628438379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:12,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684570510] [2021-06-05 07:01:12,291 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:12,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:12,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:12,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:12,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684570510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:12,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:12,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:01:12,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558585014] [2021-06-05 07:01:12,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:01:12,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:12,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:01:12,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:01:12,397 INFO L87 Difference]: Start difference. First operand 37407 states and 145323 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:13,596 INFO L93 Difference]: Finished difference Result 61875 states and 230752 transitions. [2021-06-05 07:01:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:01:13,597 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:13,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:13,751 INFO L225 Difference]: With dead ends: 61875 [2021-06-05 07:01:13,752 INFO L226 Difference]: Without dead ends: 61867 [2021-06-05 07:01:13,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:01:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61867 states. [2021-06-05 07:01:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61867 to 37407. [2021-06-05 07:01:14,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37407 states, 37406 states have (on average 3.8848580441640377) internal successors, (145317), 37406 states have internal predecessors, (145317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37407 states to 37407 states and 145317 transitions. [2021-06-05 07:01:14,827 INFO L78 Accepts]: Start accepts. Automaton has 37407 states and 145317 transitions. Word has length 28 [2021-06-05 07:01:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:14,827 INFO L482 AbstractCegarLoop]: Abstraction has 37407 states and 145317 transitions. [2021-06-05 07:01:14,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 37407 states and 145317 transitions. [2021-06-05 07:01:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:14,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:14,886 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:15,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3617,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:15,086 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:15,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:15,087 INFO L82 PathProgramCache]: Analyzing trace with hash 104546025, now seen corresponding path program 143 times [2021-06-05 07:01:15,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:15,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420592701] [2021-06-05 07:01:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:15,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:15,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420592701] [2021-06-05 07:01:15,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420592701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:15,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257950734] [2021-06-05 07:01:15,117 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:15,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:01:15,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:15,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:15,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:15,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257950734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:15,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:15,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:01:15,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766424873] [2021-06-05 07:01:15,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:01:15,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:15,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:01:15,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:01:15,234 INFO L87 Difference]: Start difference. First operand 37407 states and 145317 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:16,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:16,347 INFO L93 Difference]: Finished difference Result 61558 states and 229893 transitions. [2021-06-05 07:01:16,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:01:16,347 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:16,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:16,516 INFO L225 Difference]: With dead ends: 61558 [2021-06-05 07:01:16,516 INFO L226 Difference]: Without dead ends: 61558 [2021-06-05 07:01:16,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 538.3ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:01:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61558 states. [2021-06-05 07:01:17,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61558 to 37415. [2021-06-05 07:01:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37415 states, 37414 states have (on average 3.8849361201689208) internal successors, (145351), 37414 states have internal predecessors, (145351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37415 states to 37415 states and 145351 transitions. [2021-06-05 07:01:18,138 INFO L78 Accepts]: Start accepts. Automaton has 37415 states and 145351 transitions. Word has length 28 [2021-06-05 07:01:18,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:18,138 INFO L482 AbstractCegarLoop]: Abstraction has 37415 states and 145351 transitions. [2021-06-05 07:01:18,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:18,138 INFO L276 IsEmpty]: Start isEmpty. Operand 37415 states and 145351 transitions. [2021-06-05 07:01:18,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:18,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:18,199 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:18,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3618 [2021-06-05 07:01:18,399 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:18,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:18,400 INFO L82 PathProgramCache]: Analyzing trace with hash -950831369, now seen corresponding path program 144 times [2021-06-05 07:01:18,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:18,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953207271] [2021-06-05 07:01:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:18,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:18,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953207271] [2021-06-05 07:01:18,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953207271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:18,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696488157] [2021-06-05 07:01:18,431 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:18,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:01:18,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:18,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:18,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:18,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696488157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:18,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:18,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:01:18,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683504566] [2021-06-05 07:01:18,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:01:18,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:18,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:01:18,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:01:18,661 INFO L87 Difference]: Start difference. First operand 37415 states and 145351 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:19,733 INFO L93 Difference]: Finished difference Result 61347 states and 229367 transitions. [2021-06-05 07:01:19,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:01:19,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:19,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:19,901 INFO L225 Difference]: With dead ends: 61347 [2021-06-05 07:01:19,901 INFO L226 Difference]: Without dead ends: 61339 [2021-06-05 07:01:19,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 635.0ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:01:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61339 states. [2021-06-05 07:01:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61339 to 37415. [2021-06-05 07:01:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37415 states, 37414 states have (on average 3.884882664243331) internal successors, (145349), 37414 states have internal predecessors, (145349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37415 states to 37415 states and 145349 transitions. [2021-06-05 07:01:21,318 INFO L78 Accepts]: Start accepts. Automaton has 37415 states and 145349 transitions. Word has length 28 [2021-06-05 07:01:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:21,318 INFO L482 AbstractCegarLoop]: Abstraction has 37415 states and 145349 transitions. [2021-06-05 07:01:21,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 37415 states and 145349 transitions. [2021-06-05 07:01:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:21,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:21,379 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:21,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3619 [2021-06-05 07:01:21,580 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:21,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:21,580 INFO L82 PathProgramCache]: Analyzing trace with hash 401579921, now seen corresponding path program 145 times [2021-06-05 07:01:21,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:21,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666469309] [2021-06-05 07:01:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:21,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666469309] [2021-06-05 07:01:21,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666469309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990484223] [2021-06-05 07:01:21,612 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:21,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990484223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:21,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:21,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:01:21,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624398244] [2021-06-05 07:01:21,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:01:21,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:21,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:01:21,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:01:21,712 INFO L87 Difference]: Start difference. First operand 37415 states and 145349 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:23,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:23,038 INFO L93 Difference]: Finished difference Result 60787 states and 225952 transitions. [2021-06-05 07:01:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:01:23,039 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:23,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:23,189 INFO L225 Difference]: With dead ends: 60787 [2021-06-05 07:01:23,189 INFO L226 Difference]: Without dead ends: 60787 [2021-06-05 07:01:23,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 597.6ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 07:01:23,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60787 states. [2021-06-05 07:01:24,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60787 to 40214. [2021-06-05 07:01:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40214 states, 40213 states have (on average 3.8890159898540273) internal successors, (156389), 40213 states have internal predecessors, (156389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40214 states to 40214 states and 156389 transitions. [2021-06-05 07:01:24,484 INFO L78 Accepts]: Start accepts. Automaton has 40214 states and 156389 transitions. Word has length 28 [2021-06-05 07:01:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:24,484 INFO L482 AbstractCegarLoop]: Abstraction has 40214 states and 156389 transitions. [2021-06-05 07:01:24,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:24,484 INFO L276 IsEmpty]: Start isEmpty. Operand 40214 states and 156389 transitions. [2021-06-05 07:01:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:24,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:24,554 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:24,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3620,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:24,754 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:24,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1473896895, now seen corresponding path program 146 times [2021-06-05 07:01:24,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:24,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630480937] [2021-06-05 07:01:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:24,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:24,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630480937] [2021-06-05 07:01:24,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630480937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:24,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760834192] [2021-06-05 07:01:24,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:24,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:24,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:24,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:24,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:25,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760834192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:25,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:25,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:01:25,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137003521] [2021-06-05 07:01:25,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:01:25,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:25,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:01:25,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:01:25,090 INFO L87 Difference]: Start difference. First operand 40214 states and 156389 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:26,157 INFO L93 Difference]: Finished difference Result 60310 states and 224694 transitions. [2021-06-05 07:01:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:01:26,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:26,309 INFO L225 Difference]: With dead ends: 60310 [2021-06-05 07:01:26,309 INFO L226 Difference]: Without dead ends: 60302 [2021-06-05 07:01:26,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 652.8ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:01:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60302 states. [2021-06-05 07:01:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60302 to 39928. [2021-06-05 07:01:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39928 states, 39927 states have (on average 3.8946577503944697) internal successors, (155502), 39927 states have internal predecessors, (155502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39928 states to 39928 states and 155502 transitions. [2021-06-05 07:01:27,598 INFO L78 Accepts]: Start accepts. Automaton has 39928 states and 155502 transitions. Word has length 28 [2021-06-05 07:01:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:27,598 INFO L482 AbstractCegarLoop]: Abstraction has 39928 states and 155502 transitions. [2021-06-05 07:01:27,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 39928 states and 155502 transitions. [2021-06-05 07:01:27,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:27,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:27,668 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:27,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3621,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:27,869 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:27,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1560233875, now seen corresponding path program 147 times [2021-06-05 07:01:27,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:27,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128039883] [2021-06-05 07:01:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:27,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:27,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128039883] [2021-06-05 07:01:27,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128039883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:27,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462974221] [2021-06-05 07:01:27,904 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:27,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:01:27,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:27,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:27,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:28,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462974221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:28,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:28,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 07:01:28,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113142070] [2021-06-05 07:01:28,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:01:28,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:28,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:01:28,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:01:28,012 INFO L87 Difference]: Start difference. First operand 39928 states and 155502 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:29,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:29,047 INFO L93 Difference]: Finished difference Result 58857 states and 220695 transitions. [2021-06-05 07:01:29,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:01:29,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:29,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:29,201 INFO L225 Difference]: With dead ends: 58857 [2021-06-05 07:01:29,201 INFO L226 Difference]: Without dead ends: 58833 [2021-06-05 07:01:29,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 378.1ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:01:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58833 states. [2021-06-05 07:01:30,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58833 to 39834. [2021-06-05 07:01:30,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39834 states, 39833 states have (on average 3.894635101548967) internal successors, (155135), 39833 states have internal predecessors, (155135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:30,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39834 states to 39834 states and 155135 transitions. [2021-06-05 07:01:30,500 INFO L78 Accepts]: Start accepts. Automaton has 39834 states and 155135 transitions. Word has length 28 [2021-06-05 07:01:30,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:30,500 INFO L482 AbstractCegarLoop]: Abstraction has 39834 states and 155135 transitions. [2021-06-05 07:01:30,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:30,500 INFO L276 IsEmpty]: Start isEmpty. Operand 39834 states and 155135 transitions. [2021-06-05 07:01:30,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:30,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:30,564 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:30,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3622,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:30,764 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:30,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:30,764 INFO L82 PathProgramCache]: Analyzing trace with hash -887947539, now seen corresponding path program 148 times [2021-06-05 07:01:30,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:30,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104279870] [2021-06-05 07:01:30,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:30,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:30,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104279870] [2021-06-05 07:01:30,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104279870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:30,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485367827] [2021-06-05 07:01:30,796 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:30,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:30,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:30,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:30,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:31,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485367827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:31,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:31,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:01:31,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96038744] [2021-06-05 07:01:31,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:01:31,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:31,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:01:31,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:01:31,102 INFO L87 Difference]: Start difference. First operand 39834 states and 155135 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:32,415 INFO L93 Difference]: Finished difference Result 60084 states and 224060 transitions. [2021-06-05 07:01:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 07:01:32,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:32,601 INFO L225 Difference]: With dead ends: 60084 [2021-06-05 07:01:32,601 INFO L226 Difference]: Without dead ends: 60084 [2021-06-05 07:01:32,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 659.0ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 07:01:32,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60084 states. [2021-06-05 07:01:33,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60084 to 39930. [2021-06-05 07:01:33,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39930 states, 39929 states have (on average 3.8931353151844523) internal successors, (155449), 39929 states have internal predecessors, (155449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39930 states to 39930 states and 155449 transitions. [2021-06-05 07:01:33,842 INFO L78 Accepts]: Start accepts. Automaton has 39930 states and 155449 transitions. Word has length 28 [2021-06-05 07:01:33,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:33,842 INFO L482 AbstractCegarLoop]: Abstraction has 39930 states and 155449 transitions. [2021-06-05 07:01:33,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 39930 states and 155449 transitions. [2021-06-05 07:01:33,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:33,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:33,904 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:34,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3623 [2021-06-05 07:01:34,104 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:34,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:34,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1943324933, now seen corresponding path program 149 times [2021-06-05 07:01:34,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:34,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356307743] [2021-06-05 07:01:34,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:34,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:34,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356307743] [2021-06-05 07:01:34,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356307743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:34,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672806854] [2021-06-05 07:01:34,137 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:34,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:01:34,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:34,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:34,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:34,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672806854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:34,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:34,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 07:01:34,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967018619] [2021-06-05 07:01:34,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:01:34,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:34,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:01:34,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:01:34,247 INFO L87 Difference]: Start difference. First operand 39930 states and 155449 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:35,373 INFO L93 Difference]: Finished difference Result 59771 states and 223172 transitions. [2021-06-05 07:01:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:01:35,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:35,536 INFO L225 Difference]: With dead ends: 59771 [2021-06-05 07:01:35,537 INFO L226 Difference]: Without dead ends: 59763 [2021-06-05 07:01:35,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 470.8ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:01:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59763 states. [2021-06-05 07:01:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59763 to 39858. [2021-06-05 07:01:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39858 states, 39857 states have (on average 3.894598188523973) internal successors, (155227), 39857 states have internal predecessors, (155227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:37,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39858 states to 39858 states and 155227 transitions. [2021-06-05 07:01:37,005 INFO L78 Accepts]: Start accepts. Automaton has 39858 states and 155227 transitions. Word has length 28 [2021-06-05 07:01:37,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:37,005 INFO L482 AbstractCegarLoop]: Abstraction has 39858 states and 155227 transitions. [2021-06-05 07:01:37,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 39858 states and 155227 transitions. [2021-06-05 07:01:37,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:37,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:37,071 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:37,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3624,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:37,287 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:37,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:37,287 INFO L82 PathProgramCache]: Analyzing trace with hash -460189995, now seen corresponding path program 150 times [2021-06-05 07:01:37,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:37,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749103851] [2021-06-05 07:01:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:37,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:37,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749103851] [2021-06-05 07:01:37,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749103851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:37,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110492588] [2021-06-05 07:01:37,319 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:37,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:01:37,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:37,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:37,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:37,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110492588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:37,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:37,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 07:01:37,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751666646] [2021-06-05 07:01:37,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:01:37,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:37,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:01:37,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:01:37,423 INFO L87 Difference]: Start difference. First operand 39858 states and 155227 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:38,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:38,477 INFO L93 Difference]: Finished difference Result 58502 states and 219661 transitions. [2021-06-05 07:01:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:01:38,477 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:38,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:38,626 INFO L225 Difference]: With dead ends: 58502 [2021-06-05 07:01:38,626 INFO L226 Difference]: Without dead ends: 58478 [2021-06-05 07:01:38,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 341.5ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:01:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58478 states. [2021-06-05 07:01:39,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58478 to 39834. [2021-06-05 07:01:39,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39834 states, 39833 states have (on average 3.8947355207993373) internal successors, (155139), 39833 states have internal predecessors, (155139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39834 states to 39834 states and 155139 transitions. [2021-06-05 07:01:39,829 INFO L78 Accepts]: Start accepts. Automaton has 39834 states and 155139 transitions. Word has length 28 [2021-06-05 07:01:39,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:39,829 INFO L482 AbstractCegarLoop]: Abstraction has 39834 states and 155139 transitions. [2021-06-05 07:01:39,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:39,829 INFO L276 IsEmpty]: Start isEmpty. Operand 39834 states and 155139 transitions. [2021-06-05 07:01:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:39,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:39,889 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:40,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3625 [2021-06-05 07:01:40,090 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:40,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:40,090 INFO L82 PathProgramCache]: Analyzing trace with hash 117906837, now seen corresponding path program 151 times [2021-06-05 07:01:40,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:40,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800832489] [2021-06-05 07:01:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:40,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:40,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800832489] [2021-06-05 07:01:40,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800832489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:40,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381582107] [2021-06-05 07:01:40,127 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:40,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:40,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:40,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381582107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:40,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:40,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:01:40,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120810615] [2021-06-05 07:01:40,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:01:40,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:40,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:01:40,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:01:40,220 INFO L87 Difference]: Start difference. First operand 39834 states and 155139 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:42,024 INFO L93 Difference]: Finished difference Result 61684 states and 228711 transitions. [2021-06-05 07:01:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 07:01:42,024 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:42,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:42,198 INFO L225 Difference]: With dead ends: 61684 [2021-06-05 07:01:42,198 INFO L226 Difference]: Without dead ends: 61684 [2021-06-05 07:01:42,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 893.5ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 07:01:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61684 states. [2021-06-05 07:01:43,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61684 to 44178. [2021-06-05 07:01:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44178 states, 44177 states have (on average 3.844376032777237) internal successors, (169833), 44177 states have internal predecessors, (169833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44178 states to 44178 states and 169833 transitions. [2021-06-05 07:01:43,517 INFO L78 Accepts]: Start accepts. Automaton has 44178 states and 169833 transitions. Word has length 28 [2021-06-05 07:01:43,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:43,517 INFO L482 AbstractCegarLoop]: Abstraction has 44178 states and 169833 transitions. [2021-06-05 07:01:43,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:43,517 INFO L276 IsEmpty]: Start isEmpty. Operand 44178 states and 169833 transitions. [2021-06-05 07:01:43,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:43,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:43,585 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:43,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3626,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:43,785 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:43,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:43,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1190223811, now seen corresponding path program 152 times [2021-06-05 07:01:43,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:43,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944422141] [2021-06-05 07:01:43,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:43,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:43,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944422141] [2021-06-05 07:01:43,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944422141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:43,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330334886] [2021-06-05 07:01:43,821 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:43,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:43,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:43,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:43,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:43,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330334886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:43,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:43,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:01:43,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425641881] [2021-06-05 07:01:43,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:01:43,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:43,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:01:43,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:01:43,908 INFO L87 Difference]: Start difference. First operand 44178 states and 169833 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:45,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:45,279 INFO L93 Difference]: Finished difference Result 60908 states and 226590 transitions. [2021-06-05 07:01:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 07:01:45,280 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:45,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:45,435 INFO L225 Difference]: With dead ends: 60908 [2021-06-05 07:01:45,435 INFO L226 Difference]: Without dead ends: 60900 [2021-06-05 07:01:45,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 816.3ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 07:01:45,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60900 states. [2021-06-05 07:01:46,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60900 to 43034. [2021-06-05 07:01:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43034 states, 43033 states have (on average 3.86408105407478) internal successors, (166283), 43033 states have internal predecessors, (166283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43034 states to 43034 states and 166283 transitions. [2021-06-05 07:01:46,879 INFO L78 Accepts]: Start accepts. Automaton has 43034 states and 166283 transitions. Word has length 28 [2021-06-05 07:01:46,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:46,879 INFO L482 AbstractCegarLoop]: Abstraction has 43034 states and 166283 transitions. [2021-06-05 07:01:46,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 43034 states and 166283 transitions. [2021-06-05 07:01:46,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:46,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:46,956 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:47,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3627 [2021-06-05 07:01:47,156 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:47,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:47,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1843906959, now seen corresponding path program 153 times [2021-06-05 07:01:47,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:47,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973522665] [2021-06-05 07:01:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:47,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:47,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973522665] [2021-06-05 07:01:47,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973522665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:47,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877645189] [2021-06-05 07:01:47,196 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:47,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:01:47,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:47,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:47,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:47,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877645189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:47,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:47,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:01:47,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136325314] [2021-06-05 07:01:47,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:01:47,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:47,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:01:47,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:01:47,293 INFO L87 Difference]: Start difference. First operand 43034 states and 166283 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:48,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:48,456 INFO L93 Difference]: Finished difference Result 59247 states and 221971 transitions. [2021-06-05 07:01:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:01:48,464 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:48,862 INFO L225 Difference]: With dead ends: 59247 [2021-06-05 07:01:48,862 INFO L226 Difference]: Without dead ends: 59223 [2021-06-05 07:01:48,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 589.2ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:01:48,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59223 states. [2021-06-05 07:01:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59223 to 43046. [2021-06-05 07:01:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43046 states, 43045 states have (on average 3.8619351841096528) internal successors, (166237), 43045 states have internal predecessors, (166237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43046 states to 43046 states and 166237 transitions. [2021-06-05 07:01:49,964 INFO L78 Accepts]: Start accepts. Automaton has 43046 states and 166237 transitions. Word has length 28 [2021-06-05 07:01:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:49,964 INFO L482 AbstractCegarLoop]: Abstraction has 43046 states and 166237 transitions. [2021-06-05 07:01:49,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 43046 states and 166237 transitions. [2021-06-05 07:01:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:50,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:50,028 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:50,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3628,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:50,228 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:50,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1653229165, now seen corresponding path program 154 times [2021-06-05 07:01:50,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:50,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102947440] [2021-06-05 07:01:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:50,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:50,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102947440] [2021-06-05 07:01:50,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102947440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:50,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094774965] [2021-06-05 07:01:50,265 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:50,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:50,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:50,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:50,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:50,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094774965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:50,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:50,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 07:01:50,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746800766] [2021-06-05 07:01:50,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:01:50,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:01:50,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:01:50,350 INFO L87 Difference]: Start difference. First operand 43046 states and 166237 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:51,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:51,525 INFO L93 Difference]: Finished difference Result 60535 states and 225583 transitions. [2021-06-05 07:01:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:01:51,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:51,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:51,674 INFO L225 Difference]: With dead ends: 60535 [2021-06-05 07:01:51,674 INFO L226 Difference]: Without dead ends: 60495 [2021-06-05 07:01:51,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 492.0ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:01:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60495 states. [2021-06-05 07:01:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60495 to 43178. [2021-06-05 07:01:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43178 states, 43177 states have (on average 3.861245570558399) internal successors, (166717), 43177 states have internal predecessors, (166717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43178 states to 43178 states and 166717 transitions. [2021-06-05 07:01:53,067 INFO L78 Accepts]: Start accepts. Automaton has 43178 states and 166717 transitions. Word has length 28 [2021-06-05 07:01:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:53,067 INFO L482 AbstractCegarLoop]: Abstraction has 43178 states and 166717 transitions. [2021-06-05 07:01:53,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 43178 states and 166717 transitions. [2021-06-05 07:01:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:53,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:53,141 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:53,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3629 [2021-06-05 07:01:53,341 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:53,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:53,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1707857389, now seen corresponding path program 155 times [2021-06-05 07:01:53,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:53,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704864789] [2021-06-05 07:01:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:53,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:53,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704864789] [2021-06-05 07:01:53,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704864789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:53,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478364063] [2021-06-05 07:01:53,379 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:53,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:01:53,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:53,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:53,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:53,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478364063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:53,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:53,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:01:53,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437126293] [2021-06-05 07:01:53,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:01:53,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:53,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:01:53,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:01:53,498 INFO L87 Difference]: Start difference. First operand 43178 states and 166717 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:55,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:55,059 INFO L93 Difference]: Finished difference Result 59754 states and 223244 transitions. [2021-06-05 07:01:55,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 07:01:55,059 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:55,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:55,217 INFO L225 Difference]: With dead ends: 59754 [2021-06-05 07:01:55,217 INFO L226 Difference]: Without dead ends: 59754 [2021-06-05 07:01:55,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 793.3ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 07:01:55,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59754 states. [2021-06-05 07:01:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59754 to 44087. [2021-06-05 07:01:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44087 states, 44086 states have (on average 3.851517488545116) internal successors, (169798), 44086 states have internal predecessors, (169798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:56,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44087 states to 44087 states and 169798 transitions. [2021-06-05 07:01:56,580 INFO L78 Accepts]: Start accepts. Automaton has 44087 states and 169798 transitions. Word has length 28 [2021-06-05 07:01:56,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:56,581 INFO L482 AbstractCegarLoop]: Abstraction has 44087 states and 169798 transitions. [2021-06-05 07:01:56,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:56,581 INFO L276 IsEmpty]: Start isEmpty. Operand 44087 states and 169798 transitions. [2021-06-05 07:01:56,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:56,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:56,647 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:56,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3630,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:56,853 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:56,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:56,853 INFO L82 PathProgramCache]: Analyzing trace with hash 652479995, now seen corresponding path program 156 times [2021-06-05 07:01:56,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:56,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378286592] [2021-06-05 07:01:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:56,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:56,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378286592] [2021-06-05 07:01:56,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378286592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:56,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318369765] [2021-06-05 07:01:56,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:56,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:01:56,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:56,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:01:56,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:57,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318369765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:57,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:57,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:01:57,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555402564] [2021-06-05 07:01:57,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:01:57,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:57,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:01:57,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:01:57,015 INFO L87 Difference]: Start difference. First operand 44087 states and 169798 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:58,403 INFO L93 Difference]: Finished difference Result 59256 states and 221849 transitions. [2021-06-05 07:01:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:01:58,413 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:01:58,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:58,574 INFO L225 Difference]: With dead ends: 59256 [2021-06-05 07:01:58,574 INFO L226 Difference]: Without dead ends: 59248 [2021-06-05 07:01:58,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 640.4ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:01:58,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59248 states. [2021-06-05 07:01:59,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59248 to 44011. [2021-06-05 07:01:59,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44011 states, 44010 states have (on average 3.8528061804135425) internal successors, (169562), 44010 states have internal predecessors, (169562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44011 states to 44011 states and 169562 transitions. [2021-06-05 07:01:59,818 INFO L78 Accepts]: Start accepts. Automaton has 44011 states and 169562 transitions. Word has length 28 [2021-06-05 07:01:59,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:59,818 INFO L482 AbstractCegarLoop]: Abstraction has 44011 states and 169562 transitions. [2021-06-05 07:01:59,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:59,818 INFO L276 IsEmpty]: Start isEmpty. Operand 44011 states and 169562 transitions. [2021-06-05 07:01:59,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:01:59,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:59,882 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:00,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3631,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:00,083 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:00,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:00,083 INFO L82 PathProgramCache]: Analyzing trace with hash 2135614933, now seen corresponding path program 157 times [2021-06-05 07:02:00,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:00,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177449515] [2021-06-05 07:02:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:00,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:00,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177449515] [2021-06-05 07:02:00,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177449515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:00,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029747266] [2021-06-05 07:02:00,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:00,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:00,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:00,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029747266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:00,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:00,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:02:00,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111648106] [2021-06-05 07:02:00,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:00,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:00,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:00,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:00,223 INFO L87 Difference]: Start difference. First operand 44011 states and 169562 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:01,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:01,496 INFO L93 Difference]: Finished difference Result 58733 states and 220603 transitions. [2021-06-05 07:02:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:02:01,497 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:01,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:01,640 INFO L225 Difference]: With dead ends: 58733 [2021-06-05 07:02:01,640 INFO L226 Difference]: Without dead ends: 58709 [2021-06-05 07:02:01,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 531.6ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:02:01,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58709 states. [2021-06-05 07:02:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58709 to 43997. [2021-06-05 07:02:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43997 states, 43996 states have (on average 3.8527820710973724) internal successors, (169507), 43996 states have internal predecessors, (169507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43997 states to 43997 states and 169507 transitions. [2021-06-05 07:02:02,896 INFO L78 Accepts]: Start accepts. Automaton has 43997 states and 169507 transitions. Word has length 28 [2021-06-05 07:02:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:02,896 INFO L482 AbstractCegarLoop]: Abstraction has 43997 states and 169507 transitions. [2021-06-05 07:02:02,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:02,896 INFO L276 IsEmpty]: Start isEmpty. Operand 43997 states and 169507 transitions. [2021-06-05 07:02:02,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:02,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:02,960 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:03,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:03,160 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:03,161 INFO L82 PathProgramCache]: Analyzing trace with hash -613280551, now seen corresponding path program 158 times [2021-06-05 07:02:03,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:03,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384698509] [2021-06-05 07:02:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:03,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:03,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384698509] [2021-06-05 07:02:03,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384698509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:03,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288376390] [2021-06-05 07:02:03,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:03,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:03,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:03,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:03,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:03,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288376390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:03,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:03,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 07:02:03,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878998727] [2021-06-05 07:02:03,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:02:03,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:03,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:02:03,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:02:03,296 INFO L87 Difference]: Start difference. First operand 43997 states and 169507 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:04,551 INFO L93 Difference]: Finished difference Result 58515 states and 219910 transitions. [2021-06-05 07:02:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 07:02:04,551 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:04,715 INFO L225 Difference]: With dead ends: 58515 [2021-06-05 07:02:04,716 INFO L226 Difference]: Without dead ends: 58475 [2021-06-05 07:02:04,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:02:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58475 states. [2021-06-05 07:02:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58475 to 44346. [2021-06-05 07:02:05,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44346 states, 44345 states have (on average 3.854684857368362) internal successors, (170936), 44345 states have internal predecessors, (170936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44346 states to 44346 states and 170936 transitions. [2021-06-05 07:02:06,016 INFO L78 Accepts]: Start accepts. Automaton has 44346 states and 170936 transitions. Word has length 28 [2021-06-05 07:02:06,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:06,016 INFO L482 AbstractCegarLoop]: Abstraction has 44346 states and 170936 transitions. [2021-06-05 07:02:06,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:06,016 INFO L276 IsEmpty]: Start isEmpty. Operand 44346 states and 170936 transitions. [2021-06-05 07:02:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:06,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:06,077 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:06,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3633,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:06,278 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:06,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:06,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1767766801, now seen corresponding path program 159 times [2021-06-05 07:02:06,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:06,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518877630] [2021-06-05 07:02:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:06,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:06,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518877630] [2021-06-05 07:02:06,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518877630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:06,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463376854] [2021-06-05 07:02:06,320 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:06,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:02:06,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:06,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:06,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:06,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463376854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:06,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:06,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:02:06,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779312766] [2021-06-05 07:02:06,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:06,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:06,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:06,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:06,433 INFO L87 Difference]: Start difference. First operand 44346 states and 170936 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:07,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:07,840 INFO L93 Difference]: Finished difference Result 71060 states and 264453 transitions. [2021-06-05 07:02:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:02:07,841 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:08,030 INFO L225 Difference]: With dead ends: 71060 [2021-06-05 07:02:08,030 INFO L226 Difference]: Without dead ends: 71060 [2021-06-05 07:02:08,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 587.5ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:02:08,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71060 states. [2021-06-05 07:02:09,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71060 to 45512. [2021-06-05 07:02:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45512 states, 45511 states have (on average 3.869196457999165) internal successors, (176091), 45511 states have internal predecessors, (176091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45512 states to 45512 states and 176091 transitions. [2021-06-05 07:02:09,614 INFO L78 Accepts]: Start accepts. Automaton has 45512 states and 176091 transitions. Word has length 28 [2021-06-05 07:02:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:09,615 INFO L482 AbstractCegarLoop]: Abstraction has 45512 states and 176091 transitions. [2021-06-05 07:02:09,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:09,615 INFO L276 IsEmpty]: Start isEmpty. Operand 45512 states and 176091 transitions. [2021-06-05 07:02:09,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:09,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:09,685 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:09,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3634 [2021-06-05 07:02:09,885 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:09,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:09,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1155272981, now seen corresponding path program 160 times [2021-06-05 07:02:09,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:09,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825739164] [2021-06-05 07:02:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:09,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:09,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825739164] [2021-06-05 07:02:09,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825739164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:09,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272581950] [2021-06-05 07:02:09,926 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:09,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:09,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:09,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:10,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272581950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:10,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:10,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:02:10,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902170830] [2021-06-05 07:02:10,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:10,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:10,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:10,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:10,057 INFO L87 Difference]: Start difference. First operand 45512 states and 176091 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:11,196 INFO L93 Difference]: Finished difference Result 65145 states and 245703 transitions. [2021-06-05 07:02:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:02:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:11,357 INFO L225 Difference]: With dead ends: 65145 [2021-06-05 07:02:11,357 INFO L226 Difference]: Without dead ends: 65145 [2021-06-05 07:02:11,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 541.8ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:02:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65145 states. [2021-06-05 07:02:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65145 to 45542. [2021-06-05 07:02:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45542 states, 45541 states have (on average 3.868997167387629) internal successors, (176198), 45541 states have internal predecessors, (176198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:12,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45542 states to 45542 states and 176198 transitions. [2021-06-05 07:02:12,748 INFO L78 Accepts]: Start accepts. Automaton has 45542 states and 176198 transitions. Word has length 28 [2021-06-05 07:02:12,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:12,748 INFO L482 AbstractCegarLoop]: Abstraction has 45542 states and 176198 transitions. [2021-06-05 07:02:12,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:12,749 INFO L276 IsEmpty]: Start isEmpty. Operand 45542 states and 176198 transitions. [2021-06-05 07:02:12,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:12,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:12,820 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:13,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3635,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:13,025 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:13,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2039891173, now seen corresponding path program 161 times [2021-06-05 07:02:13,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:13,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287881156] [2021-06-05 07:02:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:13,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:13,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287881156] [2021-06-05 07:02:13,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287881156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:13,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916095796] [2021-06-05 07:02:13,075 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:13,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:02:13,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:13,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:13,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:13,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916095796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:13,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:13,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:02:13,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107582469] [2021-06-05 07:02:13,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:02:13,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:13,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:02:13,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:02:13,209 INFO L87 Difference]: Start difference. First operand 45542 states and 176198 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:14,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:14,950 INFO L93 Difference]: Finished difference Result 66003 states and 248139 transitions. [2021-06-05 07:02:14,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:02:14,951 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:14,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:15,118 INFO L225 Difference]: With dead ends: 66003 [2021-06-05 07:02:15,118 INFO L226 Difference]: Without dead ends: 66003 [2021-06-05 07:02:15,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 877.7ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 07:02:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66003 states. [2021-06-05 07:02:16,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66003 to 45806. [2021-06-05 07:02:16,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45806 states, 45805 states have (on average 3.8654295382600155) internal successors, (177056), 45805 states have internal predecessors, (177056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:16,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45806 states to 45806 states and 177056 transitions. [2021-06-05 07:02:16,530 INFO L78 Accepts]: Start accepts. Automaton has 45806 states and 177056 transitions. Word has length 28 [2021-06-05 07:02:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:16,530 INFO L482 AbstractCegarLoop]: Abstraction has 45806 states and 177056 transitions. [2021-06-05 07:02:16,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 45806 states and 177056 transitions. [2021-06-05 07:02:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:16,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:16,600 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:16,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3636,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:16,800 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:16,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:16,800 INFO L82 PathProgramCache]: Analyzing trace with hash 984513779, now seen corresponding path program 162 times [2021-06-05 07:02:16,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:16,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205286163] [2021-06-05 07:02:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:16,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:16,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205286163] [2021-06-05 07:02:16,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205286163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:16,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700730658] [2021-06-05 07:02:16,836 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:16,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:02:16,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:16,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:16,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:16,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700730658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:16,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:16,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:02:16,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492485782] [2021-06-05 07:02:16,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:02:16,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:16,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:02:16,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:02:16,950 INFO L87 Difference]: Start difference. First operand 45806 states and 177056 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:18,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:18,469 INFO L93 Difference]: Finished difference Result 65215 states and 245904 transitions. [2021-06-05 07:02:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:02:18,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:18,648 INFO L225 Difference]: With dead ends: 65215 [2021-06-05 07:02:18,648 INFO L226 Difference]: Without dead ends: 65211 [2021-06-05 07:02:18,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 668.9ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 07:02:18,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65211 states. [2021-06-05 07:02:19,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65211 to 45442. [2021-06-05 07:02:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45442 states, 45441 states have (on average 3.869193019519817) internal successors, (175820), 45441 states have internal predecessors, (175820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45442 states to 45442 states and 175820 transitions. [2021-06-05 07:02:19,932 INFO L78 Accepts]: Start accepts. Automaton has 45442 states and 175820 transitions. Word has length 28 [2021-06-05 07:02:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:19,932 INFO L482 AbstractCegarLoop]: Abstraction has 45442 states and 175820 transitions. [2021-06-05 07:02:19,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 45442 states and 175820 transitions. [2021-06-05 07:02:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:20,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:20,231 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:20,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3637 [2021-06-05 07:02:20,445 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash 452743569, now seen corresponding path program 163 times [2021-06-05 07:02:20,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:20,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541339700] [2021-06-05 07:02:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:20,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:20,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541339700] [2021-06-05 07:02:20,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541339700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:20,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898735224] [2021-06-05 07:02:20,489 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:20,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:20,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:20,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898735224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:20,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:20,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:02:20,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584295147] [2021-06-05 07:02:20,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:20,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:20,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:20,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:20,601 INFO L87 Difference]: Start difference. First operand 45442 states and 175820 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:21,470 INFO L93 Difference]: Finished difference Result 59545 states and 226305 transitions. [2021-06-05 07:02:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:02:21,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:21,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:21,626 INFO L225 Difference]: With dead ends: 59545 [2021-06-05 07:02:21,626 INFO L226 Difference]: Without dead ends: 59545 [2021-06-05 07:02:21,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 452.6ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:02:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59545 states. [2021-06-05 07:02:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59545 to 45458. [2021-06-05 07:02:22,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45458 states, 45457 states have (on average 3.8710869613040897) internal successors, (175968), 45457 states have internal predecessors, (175968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45458 states to 45458 states and 175968 transitions. [2021-06-05 07:02:22,945 INFO L78 Accepts]: Start accepts. Automaton has 45458 states and 175968 transitions. Word has length 28 [2021-06-05 07:02:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:22,945 INFO L482 AbstractCegarLoop]: Abstraction has 45458 states and 175968 transitions. [2021-06-05 07:02:22,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 45458 states and 175968 transitions. [2021-06-05 07:02:23,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:23,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:23,267 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:23,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3638,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:23,481 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:23,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:23,481 INFO L82 PathProgramCache]: Analyzing trace with hash 75176401, now seen corresponding path program 164 times [2021-06-05 07:02:23,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:23,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537228258] [2021-06-05 07:02:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:23,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:23,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537228258] [2021-06-05 07:02:23,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537228258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:23,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802811879] [2021-06-05 07:02:23,517 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:23,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:23,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:23,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:23,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:23,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802811879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:23,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:23,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:02:23,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378541456] [2021-06-05 07:02:23,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:23,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:23,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:23,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:23,621 INFO L87 Difference]: Start difference. First operand 45458 states and 175968 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:24,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:24,356 INFO L93 Difference]: Finished difference Result 58859 states and 224430 transitions. [2021-06-05 07:02:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:02:24,356 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:24,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:24,516 INFO L225 Difference]: With dead ends: 58859 [2021-06-05 07:02:24,516 INFO L226 Difference]: Without dead ends: 58847 [2021-06-05 07:02:24,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 346.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:02:24,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58847 states. [2021-06-05 07:02:25,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58847 to 45392. [2021-06-05 07:02:25,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45392 states, 45391 states have (on average 3.8722433962679825) internal successors, (175765), 45391 states have internal predecessors, (175765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:25,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45392 states to 45392 states and 175765 transitions. [2021-06-05 07:02:25,749 INFO L78 Accepts]: Start accepts. Automaton has 45392 states and 175765 transitions. Word has length 28 [2021-06-05 07:02:25,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:25,749 INFO L482 AbstractCegarLoop]: Abstraction has 45392 states and 175765 transitions. [2021-06-05 07:02:25,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 45392 states and 175765 transitions. [2021-06-05 07:02:25,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:25,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:25,818 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:26,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3639 [2021-06-05 07:02:26,019 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:26,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:26,019 INFO L82 PathProgramCache]: Analyzing trace with hash -681682287, now seen corresponding path program 165 times [2021-06-05 07:02:26,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:26,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625392809] [2021-06-05 07:02:26,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:26,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:26,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625392809] [2021-06-05 07:02:26,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625392809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:26,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775518239] [2021-06-05 07:02:26,057 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:26,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:02:26,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:26,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:26,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:26,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775518239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:26,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:26,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:02:26,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165536850] [2021-06-05 07:02:26,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:26,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:26,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:26,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:26,166 INFO L87 Difference]: Start difference. First operand 45392 states and 175765 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:26,372 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 07:02:26,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:26,972 INFO L93 Difference]: Finished difference Result 49879 states and 190563 transitions. [2021-06-05 07:02:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:02:26,973 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:26,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:27,107 INFO L225 Difference]: With dead ends: 49879 [2021-06-05 07:02:27,107 INFO L226 Difference]: Without dead ends: 49879 [2021-06-05 07:02:27,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 464.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:02:27,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49879 states. [2021-06-05 07:02:28,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49879 to 45600. [2021-06-05 07:02:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45600 states, 45599 states have (on average 3.8697559156999057) internal successors, (176457), 45599 states have internal predecessors, (176457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45600 states to 45600 states and 176457 transitions. [2021-06-05 07:02:28,309 INFO L78 Accepts]: Start accepts. Automaton has 45600 states and 176457 transitions. Word has length 28 [2021-06-05 07:02:28,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:28,309 INFO L482 AbstractCegarLoop]: Abstraction has 45600 states and 176457 transitions. [2021-06-05 07:02:28,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:28,309 INFO L276 IsEmpty]: Start isEmpty. Operand 45600 states and 176457 transitions. [2021-06-05 07:02:28,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:28,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:28,379 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:28,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3640,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:28,579 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:28,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:28,579 INFO L82 PathProgramCache]: Analyzing trace with hash -852441489, now seen corresponding path program 166 times [2021-06-05 07:02:28,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:28,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311506109] [2021-06-05 07:02:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:28,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:28,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311506109] [2021-06-05 07:02:28,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311506109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:28,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864544959] [2021-06-05 07:02:28,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:28,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:28,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:28,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:28,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:28,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864544959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:28,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:28,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:02:28,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543578722] [2021-06-05 07:02:28,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:02:28,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:28,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:02:28,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:02:28,713 INFO L87 Difference]: Start difference. First operand 45600 states and 176457 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:29,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:29,526 INFO L93 Difference]: Finished difference Result 49726 states and 190165 transitions. [2021-06-05 07:02:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:02:29,527 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:29,652 INFO L225 Difference]: With dead ends: 49726 [2021-06-05 07:02:29,652 INFO L226 Difference]: Without dead ends: 49722 [2021-06-05 07:02:29,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:29,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49722 states. [2021-06-05 07:02:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49722 to 45540. [2021-06-05 07:02:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45540 states, 45539 states have (on average 3.8706383539383826) internal successors, (176265), 45539 states have internal predecessors, (176265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45540 states to 45540 states and 176265 transitions. [2021-06-05 07:02:30,772 INFO L78 Accepts]: Start accepts. Automaton has 45540 states and 176265 transitions. Word has length 28 [2021-06-05 07:02:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:30,773 INFO L482 AbstractCegarLoop]: Abstraction has 45540 states and 176265 transitions. [2021-06-05 07:02:30,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 45540 states and 176265 transitions. [2021-06-05 07:02:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:30,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:30,840 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:31,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3641,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:31,040 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:31,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:31,040 INFO L82 PathProgramCache]: Analyzing trace with hash -492872947, now seen corresponding path program 81 times [2021-06-05 07:02:31,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:31,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419695969] [2021-06-05 07:02:31,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:31,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:31,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419695969] [2021-06-05 07:02:31,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419695969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:31,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444334938] [2021-06-05 07:02:31,077 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:31,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:02:31,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:31,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:31,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:31,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444334938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:31,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:31,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:02:31,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961439384] [2021-06-05 07:02:31,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:02:31,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:31,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:02:31,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:02:31,149 INFO L87 Difference]: Start difference. First operand 45540 states and 176265 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-06-05 07:02:31,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:31,717 INFO L93 Difference]: Finished difference Result 49767 states and 190248 transitions. [2021-06-05 07:02:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:02:31,717 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-06-05 07:02:31,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:31,845 INFO L225 Difference]: With dead ends: 49767 [2021-06-05 07:02:31,845 INFO L226 Difference]: Without dead ends: 49767 [2021-06-05 07:02:31,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:31,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49767 states. [2021-06-05 07:02:32,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49767 to 45644. [2021-06-05 07:02:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45644 states, 45643 states have (on average 3.8689174681769383) internal successors, (176589), 45643 states have internal predecessors, (176589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45644 states to 45644 states and 176589 transitions. [2021-06-05 07:02:32,993 INFO L78 Accepts]: Start accepts. Automaton has 45644 states and 176589 transitions. Word has length 28 [2021-06-05 07:02:32,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:32,993 INFO L482 AbstractCegarLoop]: Abstraction has 45644 states and 176589 transitions. [2021-06-05 07:02:32,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-06-05 07:02:32,993 INFO L276 IsEmpty]: Start isEmpty. Operand 45644 states and 176589 transitions. [2021-06-05 07:02:33,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:33,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:33,061 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:33,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3642,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:33,262 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:33,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1753160091, now seen corresponding path program 82 times [2021-06-05 07:02:33,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:33,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175584034] [2021-06-05 07:02:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:33,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:33,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175584034] [2021-06-05 07:02:33,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175584034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:33,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987703244] [2021-06-05 07:02:33,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:33,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:33,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:33,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:33,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:33,602 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 07:02:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:33,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987703244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:33,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:33,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 07:02:33,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740974437] [2021-06-05 07:02:33,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:02:33,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:33,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:02:33,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:02:33,637 INFO L87 Difference]: Start difference. First operand 45644 states and 176589 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:34,252 INFO L93 Difference]: Finished difference Result 56748 states and 216058 transitions. [2021-06-05 07:02:34,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:02:34,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:34,395 INFO L225 Difference]: With dead ends: 56748 [2021-06-05 07:02:34,395 INFO L226 Difference]: Without dead ends: 56658 [2021-06-05 07:02:34,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 485.3ms TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:02:34,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56658 states. [2021-06-05 07:02:35,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56658 to 45467. [2021-06-05 07:02:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45467 states, 45466 states have (on average 3.8675713720142526) internal successors, (175843), 45466 states have internal predecessors, (175843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45467 states to 45467 states and 175843 transitions. [2021-06-05 07:02:35,569 INFO L78 Accepts]: Start accepts. Automaton has 45467 states and 175843 transitions. Word has length 28 [2021-06-05 07:02:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:35,569 INFO L482 AbstractCegarLoop]: Abstraction has 45467 states and 175843 transitions. [2021-06-05 07:02:35,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 45467 states and 175843 transitions. [2021-06-05 07:02:35,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:35,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:35,638 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:35,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3643,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:35,853 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:35,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:35,853 INFO L82 PathProgramCache]: Analyzing trace with hash -115621907, now seen corresponding path program 83 times [2021-06-05 07:02:35,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:35,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418598463] [2021-06-05 07:02:35,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:35,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:35,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418598463] [2021-06-05 07:02:35,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418598463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:35,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78006511] [2021-06-05 07:02:35,884 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:35,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:02:35,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:35,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:35,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:35,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78006511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:35,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:35,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 07:02:35,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947539728] [2021-06-05 07:02:35,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 07:02:35,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:35,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 07:02:35,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:02:35,951 INFO L87 Difference]: Start difference. First operand 45467 states and 175843 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-06-05 07:02:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:36,573 INFO L93 Difference]: Finished difference Result 49946 states and 190806 transitions. [2021-06-05 07:02:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:02:36,573 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 28 [2021-06-05 07:02:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:36,698 INFO L225 Difference]: With dead ends: 49946 [2021-06-05 07:02:36,698 INFO L226 Difference]: Without dead ends: 49934 [2021-06-05 07:02:36,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:02:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49934 states. [2021-06-05 07:02:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49934 to 45605. [2021-06-05 07:02:37,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45605 states, 45604 states have (on average 3.865713533900535) internal successors, (176292), 45604 states have internal predecessors, (176292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45605 states to 45605 states and 176292 transitions. [2021-06-05 07:02:37,839 INFO L78 Accepts]: Start accepts. Automaton has 45605 states and 176292 transitions. Word has length 28 [2021-06-05 07:02:37,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:37,839 INFO L482 AbstractCegarLoop]: Abstraction has 45605 states and 176292 transitions. [2021-06-05 07:02:37,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-06-05 07:02:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 45605 states and 176292 transitions. [2021-06-05 07:02:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:37,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:37,908 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:38,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3644 [2021-06-05 07:02:38,109 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:38,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:38,109 INFO L82 PathProgramCache]: Analyzing trace with hash -903981331, now seen corresponding path program 84 times [2021-06-05 07:02:38,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:38,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068533886] [2021-06-05 07:02:38,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:38,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:38,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068533886] [2021-06-05 07:02:38,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068533886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:38,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356984402] [2021-06-05 07:02:38,145 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:38,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:02:38,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:38,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 07:02:38,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:38,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356984402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:38,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:38,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 07:02:38,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94848074] [2021-06-05 07:02:38,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 07:02:38,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:38,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 07:02:38,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:02:38,215 INFO L87 Difference]: Start difference. First operand 45605 states and 176292 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-06-05 07:02:38,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:38,679 INFO L93 Difference]: Finished difference Result 49910 states and 190722 transitions. [2021-06-05 07:02:38,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:02:38,679 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-06-05 07:02:38,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:38,809 INFO L225 Difference]: With dead ends: 49910 [2021-06-05 07:02:38,809 INFO L226 Difference]: Without dead ends: 49890 [2021-06-05 07:02:38,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:02:38,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49890 states. [2021-06-05 07:02:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49890 to 45605. [2021-06-05 07:02:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45605 states, 45604 states have (on average 3.86562582229629) internal successors, (176288), 45604 states have internal predecessors, (176288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45605 states to 45605 states and 176288 transitions. [2021-06-05 07:02:39,966 INFO L78 Accepts]: Start accepts. Automaton has 45605 states and 176288 transitions. Word has length 28 [2021-06-05 07:02:39,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:39,966 INFO L482 AbstractCegarLoop]: Abstraction has 45605 states and 176288 transitions. [2021-06-05 07:02:39,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-06-05 07:02:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 45605 states and 176288 transitions. [2021-06-05 07:02:40,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:40,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:40,033 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:40,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3645,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:40,233 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:40,233 INFO L82 PathProgramCache]: Analyzing trace with hash 987543313, now seen corresponding path program 167 times [2021-06-05 07:02:40,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:40,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83517222] [2021-06-05 07:02:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:40,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:40,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83517222] [2021-06-05 07:02:40,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83517222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:40,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699139128] [2021-06-05 07:02:40,267 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:40,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:02:40,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:40,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:02:40,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:40,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699139128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:40,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:40,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:02:40,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804624890] [2021-06-05 07:02:40,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:02:40,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:40,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:02:40,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:02:40,346 INFO L87 Difference]: Start difference. First operand 45605 states and 176288 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 07:02:40,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:40,954 INFO L93 Difference]: Finished difference Result 50572 states and 193874 transitions. [2021-06-05 07:02:40,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:02:40,954 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:02:40,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:41,084 INFO L225 Difference]: With dead ends: 50572 [2021-06-05 07:02:41,084 INFO L226 Difference]: Without dead ends: 50559 [2021-06-05 07:02:41,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:02:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50559 states. [2021-06-05 07:02:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50559 to 48338. [2021-06-05 07:02:42,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48338 states, 48337 states have (on average 3.8743819434387734) internal successors, (187276), 48337 states have internal predecessors, (187276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48338 states to 48338 states and 187276 transitions. [2021-06-05 07:02:42,211 INFO L78 Accepts]: Start accepts. Automaton has 48338 states and 187276 transitions. Word has length 28 [2021-06-05 07:02:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:42,211 INFO L482 AbstractCegarLoop]: Abstraction has 48338 states and 187276 transitions. [2021-06-05 07:02:42,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 07:02:42,211 INFO L276 IsEmpty]: Start isEmpty. Operand 48338 states and 187276 transitions. [2021-06-05 07:02:42,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:42,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:42,282 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:42,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3646 [2021-06-05 07:02:42,483 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:42,483 INFO L82 PathProgramCache]: Analyzing trace with hash 304798983, now seen corresponding path program 168 times [2021-06-05 07:02:42,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:42,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542954902] [2021-06-05 07:02:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:42,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:42,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542954902] [2021-06-05 07:02:42,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542954902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:42,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540767296] [2021-06-05 07:02:42,516 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:42,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:02:42,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:42,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:02:42,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:42,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540767296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:42,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:42,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:02:42,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438487807] [2021-06-05 07:02:42,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:02:42,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:42,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:02:42,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:02:42,600 INFO L87 Difference]: Start difference. First operand 48338 states and 187276 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 07:02:43,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:43,067 INFO L93 Difference]: Finished difference Result 53920 states and 205320 transitions. [2021-06-05 07:02:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:02:43,067 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:02:43,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:43,205 INFO L225 Difference]: With dead ends: 53920 [2021-06-05 07:02:43,205 INFO L226 Difference]: Without dead ends: 53920 [2021-06-05 07:02:43,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:02:43,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53920 states. [2021-06-05 07:02:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53920 to 42878. [2021-06-05 07:02:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42878 states, 42877 states have (on average 3.8613708981505237) internal successors, (165564), 42877 states have internal predecessors, (165564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42878 states to 42878 states and 165564 transitions. [2021-06-05 07:02:44,428 INFO L78 Accepts]: Start accepts. Automaton has 42878 states and 165564 transitions. Word has length 28 [2021-06-05 07:02:44,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:44,428 INFO L482 AbstractCegarLoop]: Abstraction has 42878 states and 165564 transitions. [2021-06-05 07:02:44,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 07:02:44,428 INFO L276 IsEmpty]: Start isEmpty. Operand 42878 states and 165564 transitions. [2021-06-05 07:02:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:44,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:44,763 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:44,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3647 [2021-06-05 07:02:44,964 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:44,964 INFO L82 PathProgramCache]: Analyzing trace with hash -15319481, now seen corresponding path program 169 times [2021-06-05 07:02:44,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:44,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867703986] [2021-06-05 07:02:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:45,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:45,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867703986] [2021-06-05 07:02:45,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867703986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:45,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654818760] [2021-06-05 07:02:45,006 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:45,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:02:45,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:45,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654818760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:45,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:45,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 07:02:45,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093565122] [2021-06-05 07:02:45,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:02:45,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:45,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:02:45,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:02:45,100 INFO L87 Difference]: Start difference. First operand 42878 states and 165564 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 07:02:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:45,708 INFO L93 Difference]: Finished difference Result 47758 states and 181995 transitions. [2021-06-05 07:02:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:02:45,709 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:02:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:45,812 INFO L225 Difference]: With dead ends: 47758 [2021-06-05 07:02:45,813 INFO L226 Difference]: Without dead ends: 47758 [2021-06-05 07:02:45,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 261.2ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:02:45,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47758 states. [2021-06-05 07:02:46,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47758 to 43711. [2021-06-05 07:02:46,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43711 states, 43710 states have (on average 3.8600320292839165) internal successors, (168722), 43710 states have internal predecessors, (168722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43711 states to 43711 states and 168722 transitions. [2021-06-05 07:02:46,847 INFO L78 Accepts]: Start accepts. Automaton has 43711 states and 168722 transitions. Word has length 28 [2021-06-05 07:02:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:46,847 INFO L482 AbstractCegarLoop]: Abstraction has 43711 states and 168722 transitions. [2021-06-05 07:02:46,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 07:02:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 43711 states and 168722 transitions. [2021-06-05 07:02:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:46,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:46,912 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:47,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3648,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:47,113 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:47,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:47,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1024489657, now seen corresponding path program 170 times [2021-06-05 07:02:47,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:47,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351284473] [2021-06-05 07:02:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:47,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:47,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351284473] [2021-06-05 07:02:47,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351284473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:47,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649376140] [2021-06-05 07:02:47,153 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:47,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:47,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:47,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:02:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:47,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649376140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:47,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:47,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 07:02:47,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567914317] [2021-06-05 07:02:47,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 07:02:47,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:47,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 07:02:47,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 07:02:47,238 INFO L87 Difference]: Start difference. First operand 43711 states and 168722 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 07:02:47,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:47,659 INFO L93 Difference]: Finished difference Result 45468 states and 174583 transitions. [2021-06-05 07:02:47,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:02:47,661 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 07:02:47,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:47,770 INFO L225 Difference]: With dead ends: 45468 [2021-06-05 07:02:47,770 INFO L226 Difference]: Without dead ends: 45468 [2021-06-05 07:02:47,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:02:47,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45468 states. [2021-06-05 07:02:48,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45468 to 43719. [2021-06-05 07:02:48,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43719 states, 43718 states have (on average 3.85987465117343) internal successors, (168746), 43718 states have internal predecessors, (168746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43719 states to 43719 states and 168746 transitions. [2021-06-05 07:02:48,794 INFO L78 Accepts]: Start accepts. Automaton has 43719 states and 168746 transitions. Word has length 28 [2021-06-05 07:02:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:48,794 INFO L482 AbstractCegarLoop]: Abstraction has 43719 states and 168746 transitions. [2021-06-05 07:02:48,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-05 07:02:48,794 INFO L276 IsEmpty]: Start isEmpty. Operand 43719 states and 168746 transitions. [2021-06-05 07:02:48,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 07:02:48,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:48,859 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:49,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3649 [2021-06-05 07:02:49,059 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:49,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:49,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1121758121, now seen corresponding path program 171 times [2021-06-05 07:02:49,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:49,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682826072] [2021-06-05 07:02:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:49,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:49,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682826072] [2021-06-05 07:02:49,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682826072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:49,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177199719] [2021-06-05 07:02:49,096 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:49,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:02:49,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:49,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 07:02:49,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:49,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177199719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:49,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:49,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 07:02:49,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756446778] [2021-06-05 07:02:49,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:02:49,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:49,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:02:49,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:02:49,186 INFO L87 Difference]: Start difference. First operand 43719 states and 168746 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:49,854 INFO L93 Difference]: Finished difference Result 45188 states and 173661 transitions. [2021-06-05 07:02:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:02:49,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 07:02:49,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:49,959 INFO L225 Difference]: With dead ends: 45188 [2021-06-05 07:02:49,960 INFO L226 Difference]: Without dead ends: 45188 [2021-06-05 07:02:49,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:02:50,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45188 states. [2021-06-05 07:02:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45188 to 43613. [2021-06-05 07:02:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43613 states, 43612 states have (on average 3.859534073190865) internal successors, (168322), 43612 states have internal predecessors, (168322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43613 states to 43613 states and 168322 transitions. [2021-06-05 07:02:51,035 INFO L78 Accepts]: Start accepts. Automaton has 43613 states and 168322 transitions. Word has length 28 [2021-06-05 07:02:51,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:51,035 INFO L482 AbstractCegarLoop]: Abstraction has 43613 states and 168322 transitions. [2021-06-05 07:02:51,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:51,035 INFO L276 IsEmpty]: Start isEmpty. Operand 43613 states and 168322 transitions. [2021-06-05 07:02:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:51,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:51,104 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:51,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3650 [2021-06-05 07:02:51,304 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:51,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:51,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1358211129, now seen corresponding path program 172 times [2021-06-05 07:02:51,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:51,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789444437] [2021-06-05 07:02:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:51,589 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2021-06-05 07:02:51,728 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-06-05 07:02:51,860 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 07:02:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:52,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:52,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789444437] [2021-06-05 07:02:52,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789444437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:52,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037395521] [2021-06-05 07:02:52,117 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:52,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:52,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:52,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:02:52,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:52,512 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 07:02:52,742 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 07:02:53,459 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 103 [2021-06-05 07:02:53,686 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 07:02:54,112 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 07:02:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:54,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:02:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:54,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:02:54,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 07:02:54,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:54,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:54,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:02:54,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:54,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 07:02:54,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:54,904 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 147 [2021-06-05 07:02:54,905 INFO L628 ElimStorePlain]: treesize reduction 364, result has 54.9 percent of original size [2021-06-05 07:02:54,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:02:54,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:54,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:54,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:02:54,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 27 [2021-06-05 07:02:54,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:54,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:02:54,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:54,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:54,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 07:02:54,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:55,158 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-06-05 07:02:55,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:55,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:02:55,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:55,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:55,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 07:02:55,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:55,315 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 07:02:55,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:55,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:55,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:55,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:02:55,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 07:02:55,324 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:55,462 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 07:02:55,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:55,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:02:55,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:55,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:55,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 07:02:55,471 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:55,604 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 07:02:55,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:55,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:55,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:55,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 07:02:55,613 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:55,741 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 07:02:55,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:55,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:55,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:55,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 07:02:55,750 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:55,869 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 07:02:55,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:55,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:55,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:55,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:02:55,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 07:02:55,877 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:55,991 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 07:02:55,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:55,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 07:02:55,996 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:867, output treesize:87 [2021-06-05 07:02:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:56,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037395521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:56,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:56,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:02:56,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999663442] [2021-06-05 07:02:56,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:02:56,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:56,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:02:56,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:02:56,075 INFO L87 Difference]: Start difference. First operand 43613 states and 168322 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:56,272 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2021-06-05 07:02:56,504 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2021-06-05 07:02:57,024 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 117 [2021-06-05 07:02:57,330 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 86 [2021-06-05 07:02:57,823 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-06-05 07:02:58,541 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2021-06-05 07:02:59,264 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 127 [2021-06-05 07:03:00,414 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 163 DAG size of output: 146 [2021-06-05 07:03:00,639 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 07:03:00,847 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 07:03:01,274 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 108 [2021-06-05 07:03:01,762 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 131 [2021-06-05 07:03:02,197 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 128 [2021-06-05 07:03:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:02,681 INFO L93 Difference]: Finished difference Result 46436 states and 176472 transitions. [2021-06-05 07:03:02,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:03:02,682 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 07:03:02,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:02,792 INFO L225 Difference]: With dead ends: 46436 [2021-06-05 07:03:02,793 INFO L226 Difference]: Without dead ends: 46376 [2021-06-05 07:03:02,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 7648.3ms TimeCoverageRelationStatistics Valid=297, Invalid=1595, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:03:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46376 states. [2021-06-05 07:03:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46376 to 43670. [2021-06-05 07:03:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43670 states, 43669 states have (on average 3.858686940392498) internal successors, (168505), 43669 states have internal predecessors, (168505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43670 states to 43670 states and 168505 transitions. [2021-06-05 07:03:03,723 INFO L78 Accepts]: Start accepts. Automaton has 43670 states and 168505 transitions. Word has length 30 [2021-06-05 07:03:03,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:03,723 INFO L482 AbstractCegarLoop]: Abstraction has 43670 states and 168505 transitions. [2021-06-05 07:03:03,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:03,723 INFO L276 IsEmpty]: Start isEmpty. Operand 43670 states and 168505 transitions. [2021-06-05 07:03:03,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:03,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:03,792 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:03,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3651,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:03,994 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:03,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:03,994 INFO L82 PathProgramCache]: Analyzing trace with hash 908358151, now seen corresponding path program 173 times [2021-06-05 07:03:03,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:03,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383029804] [2021-06-05 07:03:03,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:04,263 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 95 [2021-06-05 07:03:04,449 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2021-06-05 07:03:04,645 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2021-06-05 07:03:04,815 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-06-05 07:03:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:05,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:05,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383029804] [2021-06-05 07:03:05,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383029804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:05,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446733717] [2021-06-05 07:03:05,074 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:05,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:03:05,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:05,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:03:05,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:05,471 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 07:03:05,712 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 07:03:06,041 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 07:03:06,283 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 07:03:07,219 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 124 [2021-06-05 07:03:07,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:07,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:07,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:07,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:07,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 32 [2021-06-05 07:03:07,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:07,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:07,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:07,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:07,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 27 [2021-06-05 07:03:07,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:07,799 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 154 [2021-06-05 07:03:07,799 INFO L628 ElimStorePlain]: treesize reduction 149, result has 75.5 percent of original size [2021-06-05 07:03:07,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:07,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:07,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:07,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:07,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2021-06-05 07:03:07,810 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:08,015 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 07:03:08,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:08,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:08,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:08,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:08,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 07:03:08,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:08,216 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 07:03:08,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:08,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:08,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:08,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:08,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:08,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 07:03:08,229 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:08,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:08,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:08,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 07:03:08,238 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:08,558 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 124 [2021-06-05 07:03:08,559 INFO L628 ElimStorePlain]: treesize reduction 22, result has 94.1 percent of original size [2021-06-05 07:03:08,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:08,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:08,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 07:03:08,568 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:08,711 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 07:03:08,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:08,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:08,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:08,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 07:03:08,723 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:08,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:08,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:08,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:08,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 07:03:08,732 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:08,958 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 96 [2021-06-05 07:03:08,958 INFO L628 ElimStorePlain]: treesize reduction 22, result has 91.7 percent of original size [2021-06-05 07:03:08,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:08,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:08,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:08,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 07:03:08,967 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:09,068 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 07:03:09,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:09,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:03:09,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:09,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:09,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 07:03:09,076 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:09,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:09,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 07:03:09,170 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:689, output treesize:93 [2021-06-05 07:03:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:09,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446733717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:09,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:09,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:03:09,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248724342] [2021-06-05 07:03:09,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:03:09,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:09,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:03:09,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:03:09,256 INFO L87 Difference]: Start difference. First operand 43670 states and 168505 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:09,456 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2021-06-05 07:03:09,683 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2021-06-05 07:03:10,037 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 07:03:10,907 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 138 [2021-06-05 07:03:11,539 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 120 [2021-06-05 07:03:12,641 WARN L205 SmtUtils]: Spent 972.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 142 [2021-06-05 07:03:12,981 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 07:03:13,431 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 107 [2021-06-05 07:03:13,903 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 07:03:14,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:14,205 INFO L93 Difference]: Finished difference Result 43954 states and 169226 transitions. [2021-06-05 07:03:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:03:14,206 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 07:03:14,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:14,372 INFO L225 Difference]: With dead ends: 43954 [2021-06-05 07:03:14,372 INFO L226 Difference]: Without dead ends: 43924 [2021-06-05 07:03:14,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 6233.3ms TimeCoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:03:14,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43924 states. [2021-06-05 07:03:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43924 to 43662. [2021-06-05 07:03:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43662 states, 43661 states have (on average 3.8589129887084583) internal successors, (168484), 43661 states have internal predecessors, (168484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43662 states to 43662 states and 168484 transitions. [2021-06-05 07:03:15,191 INFO L78 Accepts]: Start accepts. Automaton has 43662 states and 168484 transitions. Word has length 30 [2021-06-05 07:03:15,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:15,191 INFO L482 AbstractCegarLoop]: Abstraction has 43662 states and 168484 transitions. [2021-06-05 07:03:15,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:15,191 INFO L276 IsEmpty]: Start isEmpty. Operand 43662 states and 168484 transitions. [2021-06-05 07:03:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:15,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:15,257 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:15,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3692 [2021-06-05 07:03:15,461 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:15,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:15,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1795179837, now seen corresponding path program 174 times [2021-06-05 07:03:15,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:15,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314274063] [2021-06-05 07:03:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:15,946 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 07:03:16,147 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 87 [2021-06-05 07:03:16,295 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-06-05 07:03:16,432 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2021-06-05 07:03:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:16,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:16,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314274063] [2021-06-05 07:03:16,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314274063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:16,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537141809] [2021-06-05 07:03:16,648 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:16,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:03:16,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:16,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:03:16,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:17,307 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 07:03:17,688 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-05 07:03:18,172 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 07:03:18,878 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 147 [2021-06-05 07:03:21,168 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 175 [2021-06-05 07:03:23,043 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 477 DAG size of output: 310 [2021-06-05 07:03:23,323 INFO L446 ElimStorePlain]: Different costs {10=[v_prenex_605, v_prenex_591, v_prenex_595, v_prenex_601], 15=[A, v_prenex_603, v_prenex_608, v_prenex_593, v_prenex_597, v_prenex_599]} [2021-06-05 07:03:23,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:23,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:23,380 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-06-05 07:03:23,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 60 treesize of output 1 [2021-06-05 07:03:23,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:23,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:23,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:23,428 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-06-05 07:03:23,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 60 treesize of output 45 [2021-06-05 07:03:23,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:24,761 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 362 DAG size of output: 333 [2021-06-05 07:03:24,762 INFO L628 ElimStorePlain]: treesize reduction 1119, result has 53.3 percent of original size [2021-06-05 07:03:24,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:24,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:24,808 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-06-05 07:03:24,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 69 treesize of output 50 [2021-06-05 07:03:24,810 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:25,224 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2021-06-05 07:03:25,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:25,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:25,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:25,269 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-06-05 07:03:25,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 66 treesize of output 49 [2021-06-05 07:03:25,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:25,656 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2021-06-05 07:03:25,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:25,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:25,690 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-06-05 07:03:25,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 40 [2021-06-05 07:03:25,691 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:26,099 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2021-06-05 07:03:26,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:26,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,151 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-06-05 07:03:26,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 98 treesize of output 61 [2021-06-05 07:03:26,152 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:26,528 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 270 [2021-06-05 07:03:26,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:26,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,605 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-06-05 07:03:26,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 109 treesize of output 68 [2021-06-05 07:03:26,606 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:26,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,639 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-06-05 07:03:26,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 107 treesize of output 1 [2021-06-05 07:03:26,639 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:26,912 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 245 [2021-06-05 07:03:26,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:26,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:26,960 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-06-05 07:03:26,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 92 treesize of output 59 [2021-06-05 07:03:26,962 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:27,241 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2021-06-05 07:03:27,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:27,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,309 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-06-05 07:03:27,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 102 treesize of output 63 [2021-06-05 07:03:27,312 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:27,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,359 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-06-05 07:03:27,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 96 treesize of output 61 [2021-06-05 07:03:27,360 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:27,587 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2021-06-05 07:03:27,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:27,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,634 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-06-05 07:03:27,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 95 treesize of output 60 [2021-06-05 07:03:27,635 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:27,843 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2021-06-05 07:03:27,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:27,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:03:27,885 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-06-05 07:03:27,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 102 treesize of output 65 [2021-06-05 07:03:27,887 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:28,084 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 07:03:28,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:28,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 40 dim-0 vars, 10 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-05 07:03:28,095 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 50 variables, input treesize:2541, output treesize:167 [2021-06-05 07:03:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:28,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537141809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:28,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:28,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:03:28,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321380422] [2021-06-05 07:03:28,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:03:28,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:28,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:03:28,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:03:28,223 INFO L87 Difference]: Start difference. First operand 43662 states and 168484 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:29,024 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2021-06-05 07:03:29,599 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 64 [2021-06-05 07:03:30,138 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 66 [2021-06-05 07:03:30,457 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 74 [2021-06-05 07:03:32,319 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 183 DAG size of output: 155 [2021-06-05 07:03:32,579 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2021-06-05 07:03:33,406 WARN L205 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 105 [2021-06-05 07:03:33,935 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2021-06-05 07:03:35,466 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 190 DAG size of output: 155 [2021-06-05 07:03:38,572 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 281 DAG size of output: 228 [2021-06-05 07:03:39,118 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 68 [2021-06-05 07:03:39,415 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 70 [2021-06-05 07:03:39,756 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 78 [2021-06-05 07:03:41,565 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 227 DAG size of output: 167 [2021-06-05 07:03:43,381 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 208 DAG size of output: 166 [2021-06-05 07:03:43,620 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 07:03:45,347 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 194 DAG size of output: 159 [2021-06-05 07:03:46,030 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 85 [2021-06-05 07:03:49,123 WARN L205 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 291 DAG size of output: 227 [2021-06-05 07:03:55,905 WARN L205 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 325 DAG size of output: 233 [2021-06-05 07:03:59,978 WARN L205 SmtUtils]: Spent 3.73 s on a formula simplification. DAG size of input: 215 DAG size of output: 166 [2021-06-05 07:04:04,658 WARN L205 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 306 DAG size of output: 239 [2021-06-05 07:04:05,024 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 88 [2021-06-05 07:04:06,711 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 201 DAG size of output: 159 [2021-06-05 07:04:11,448 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 292 DAG size of output: 232 [2021-06-05 07:04:12,198 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 117 [2021-06-05 07:04:12,769 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 07:04:13,425 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 157 [2021-06-05 07:04:13,799 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 07:04:19,769 WARN L205 SmtUtils]: Spent 5.20 s on a formula simplification. DAG size of input: 302 DAG size of output: 231 [2021-06-05 07:04:22,992 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 114 [2021-06-05 07:04:23,716 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 156 [2021-06-05 07:04:24,015 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 108 [2021-06-05 07:04:24,464 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2021-06-05 07:04:25,210 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 162 Received shutdown request... [2021-06-05 07:05:05,769 WARN L222 SmtUtils]: Removed 3 from assertion stack [2021-06-05 07:05:05,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 07:05:05,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3733 [2021-06-05 07:05:05,970 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 07:05:05,971 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 07:05:05,973 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 07:05:05,973 INFO L202 PluginConnector]: Adding new model mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 07:05:05 BasicIcfg [2021-06-05 07:05:05,973 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 07:05:05,973 INFO L168 Benchmark]: Toolchain (without parser) took 813654.89 ms. Allocated memory was 354.4 MB in the beginning and 15.5 GB in the end (delta: 15.1 GB). Free memory was 333.9 MB in the beginning and 13.6 GB in the end (delta: -13.3 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. [2021-06-05 07:05:05,973 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 335.2 MB in the beginning and 335.1 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:05:05,973 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.16 ms. Allocated memory is still 354.4 MB. Free memory was 333.9 MB in the beginning and 332.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:05:05,973 INFO L168 Benchmark]: Boogie Preprocessor took 21.96 ms. Allocated memory is still 354.4 MB. Free memory was 332.4 MB in the beginning and 331.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 07:05:05,973 INFO L168 Benchmark]: RCFGBuilder took 256.88 ms. Allocated memory is still 354.4 MB. Free memory was 331.4 MB in the beginning and 317.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 07:05:05,974 INFO L168 Benchmark]: TraceAbstraction took 813352.11 ms. Allocated memory was 354.4 MB in the beginning and 15.5 GB in the end (delta: 15.1 GB). Free memory was 317.4 MB in the beginning and 13.6 GB in the end (delta: -13.3 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. [2021-06-05 07:05:05,974 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 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 335.2 MB in the beginning and 335.1 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.16 ms. Allocated memory is still 354.4 MB. Free memory was 333.9 MB in the beginning and 332.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.96 ms. Allocated memory is still 354.4 MB. Free memory was 332.4 MB in the beginning and 331.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 256.88 ms. Allocated memory is still 354.4 MB. Free memory was 331.4 MB in the beginning and 317.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 813352.11 ms. Allocated memory was 354.4 MB in the beginning and 15.5 GB in the end (delta: 15.1 GB). Free memory was 317.4 MB in the beginning and 13.6 GB in the end (delta: -13.3 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (43662states) and FLOYD_HOARE automaton (currently 52 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 423 for 39627ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (43662states) and FLOYD_HOARE automaton (currently 52 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 423 for 39627ms.. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (43662states) and FLOYD_HOARE automaton (currently 52 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 423 for 39627ms.. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (43662states) and FLOYD_HOARE automaton (currently 52 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 423 for 39627ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 813288.0ms, OverallIterations: 260, TraceHistogramMax: 3, EmptinessCheckTime: 5178.9ms, AutomataDifference: 456141.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11465 SDtfs, 71684 SDslu, 88169 SDs, 0 SdLazy, 142564 SolverSat, 13031 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 86962.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16604 GetRequests, 5498 SyntacticMatches, 249 SemanticMatches, 10856 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180918 ImplicationChecksByTransitivity, 374381.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48338occurred in iteration=253, InterpolantAutomatonStates: 9573, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 76924.4ms AutomataMinimizationTime, 259 MinimizatonAttempts, 1250509 StatesRemovedByMinimization, 258 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 814.4ms SsaConstructionTime, 2850.0ms SatisfiabilityAnalysisTime, 213595.0ms InterpolantComputationTime, 13838 NumberOfCodeBlocks, 13838 NumberOfCodeBlocksAsserted, 903 NumberOfCheckSat, 13320 ConstructedInterpolants, 172 QuantifiedInterpolants, 291924 SizeOfPredicates, 1260 NumberOfNonLiveVariables, 19228 ConjunctsInSsa, 4343 ConjunctsInUnsatCore, 518 InterpolantComputations, 2 PerfectInterpolantSequences, 1020/4397 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