/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:33:03,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:33:03,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:33:03,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:33:03,599 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 [2021-07-13 20:33:03,638 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:33:03,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:33:03,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:33:03,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:33:03,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:33:03,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:33:03,641 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:33:03,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:33:03,641 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:33:03,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:33:03,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:33:03,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:33:03,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:33:03,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:33:03,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:33:03,643 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:33:03,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:33:03,643 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:33:03,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:33:03,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:33:03,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:33:03,662 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:33:03,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:33:03,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:33:03,663 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:33:03,663 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:33:03,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:33:03,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:33:03,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:33:03,663 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:33:03,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:33:03,664 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:33:03,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:33:03,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:33:03,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:33:03,994 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:33:03,995 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:33:03,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl [2021-07-13 20:33:03,996 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl' [2021-07-13 20:33:04,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:33:04,029 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:33:04,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:33:04,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:33:04,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:33:04,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:33:04" (1/1) ... [2021-07-13 20:33:04,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:33:04" (1/1) ... [2021-07-13 20:33:04,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:33:04,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:33:04,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:33:04,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:33:04,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:33:04" (1/1) ... [2021-07-13 20:33:04,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:33:04" (1/1) ... [2021-07-13 20:33:04,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:33:04" (1/1) ... [2021-07-13 20:33:04,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:33:04" (1/1) ... [2021-07-13 20:33:04,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:33:04" (1/1) ... [2021-07-13 20:33:04,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:33:04" (1/1) ... [2021-07-13 20:33:04,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:33:04" (1/1) ... [2021-07-13 20:33:04,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:33:04,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:33:04,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:33:04,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:33:04,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:33:04" (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 [2021-07-13 20:33:04,148 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:33:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:33:04,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:33:04,149 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:33:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:33:04,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:33:04,150 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:33:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:33:04,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:33:04,150 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:33:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:33:04,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:33:04,151 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:33:04,401 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:33:04,401 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:33:04,403 INFO L202 PluginConnector]: Adding new model max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:33:04 BoogieIcfgContainer [2021-07-13 20:33:04,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:33:04,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:33:04,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:33:04,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:33:04,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:33:04" (1/2) ... [2021-07-13 20:33:04,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6788fcca and model type max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:33:04, skipping insertion in model container [2021-07-13 20:33:04,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:33:04" (2/2) ... [2021-07-13 20:33:04,410 INFO L111 eAbstractionObserver]: Analyzing ICFG max-fun-alt.wvr.bpl [2021-07-13 20:33:04,432 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:33:04,433 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:33:04,433 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:33:04,434 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:33:04,487 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:33:04,525 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:33:04,555 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:33:04,555 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:33:04,555 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:33:04,555 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:33:04,555 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:33:04,555 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:33:04,556 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:33:04,556 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:33:04,589 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-07-13 20:33:04,648 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:04,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:33:04,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:04,665 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:04,665 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:04,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:04,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1272469491, now seen corresponding path program 1 times [2021-07-13 20:33:04,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:04,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473831267] [2021-07-13 20:33:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:04,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:04,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473831267] [2021-07-13 20:33:04,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473831267] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:33:04,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:33:04,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:33:04,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36476189] [2021-07-13 20:33:04,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:33:04,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:04,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:33:04,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:33:04,914 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:04,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:04,967 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-07-13 20:33:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:33:04,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 20:33:04,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:04,987 INFO L225 Difference]: With dead ends: 217 [2021-07-13 20:33:04,987 INFO L226 Difference]: Without dead ends: 202 [2021-07-13 20:33:04,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:33:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-13 20:33:05,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-07-13 20:33:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-07-13 20:33:05,058 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-07-13 20:33:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:05,058 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-07-13 20:33:05,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-07-13 20:33:05,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:33:05,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:05,060 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:05,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:33:05,060 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:05,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:05,066 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-07-13 20:33:05,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:05,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695046940] [2021-07-13 20:33:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:33:05,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:05,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695046940] [2021-07-13 20:33:05,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695046940] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:33:05,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:33:05,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:33:05,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681232356] [2021-07-13 20:33:05,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:33:05,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:05,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:33:05,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:33:05,127 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:05,163 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-07-13 20:33:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:33:05,163 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 [2021-07-13 20:33:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:05,165 INFO L225 Difference]: With dead ends: 158 [2021-07-13 20:33:05,165 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 20:33:05,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:33:05,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 20:33:05,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-07-13 20:33:05,175 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) [2021-07-13 20:33:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-07-13 20:33:05,176 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-07-13 20:33:05,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:05,177 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-07-13 20:33:05,177 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) [2021-07-13 20:33:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-07-13 20:33:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:33:05,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:05,179 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:05,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:33:05,179 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:05,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:05,179 INFO L82 PathProgramCache]: Analyzing trace with hash 296923691, now seen corresponding path program 1 times [2021-07-13 20:33:05,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:05,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785035500] [2021-07-13 20:33:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:33:05,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:05,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785035500] [2021-07-13 20:33:05,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785035500] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:33:05,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:33:05,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:33:05,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356544874] [2021-07-13 20:33:05,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:33:05,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:05,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:33:05,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:33:05,237 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:05,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:05,304 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-07-13 20:33:05,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:33:05,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 20:33:05,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:05,308 INFO L225 Difference]: With dead ends: 183 [2021-07-13 20:33:05,308 INFO L226 Difference]: Without dead ends: 183 [2021-07-13 20:33:05,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:33:05,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-13 20:33:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-07-13 20:33:05,323 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) [2021-07-13 20:33:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-07-13 20:33:05,325 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-07-13 20:33:05,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:05,325 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-07-13 20:33:05,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:05,325 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-07-13 20:33:05,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:33:05,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:05,327 INFO L508 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] [2021-07-13 20:33:05,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:33:05,327 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:05,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-07-13 20:33:05,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:05,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232085996] [2021-07-13 20:33:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:05,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:05,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232085996] [2021-07-13 20:33:05,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232085996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:05,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053325663] [2021-07-13 20:33:05,731 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 [2021-07-13 20:33:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:05,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:33:05,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:06,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:33:06,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:06,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:33:06,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:06,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:33:06,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:06,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:06,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:06,085 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:91, output treesize:15 [2021-07-13 20:33:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:06,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053325663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:06,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:06,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:33:06,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273173525] [2021-07-13 20:33:06,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:33:06,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:06,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:33:06,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:33:06,142 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:06,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:06,443 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-07-13 20:33:06,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:33:06,443 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:33:06,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:06,448 INFO L225 Difference]: With dead ends: 330 [2021-07-13 20:33:06,448 INFO L226 Difference]: Without dead ends: 315 [2021-07-13 20:33:06,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 468.9ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:33:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-13 20:33:06,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-07-13 20:33:06,480 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) [2021-07-13 20:33:06,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-07-13 20:33:06,481 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-07-13 20:33:06,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:06,481 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-07-13 20:33:06,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:06,482 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-07-13 20:33:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:33:06,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:06,484 INFO L508 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] [2021-07-13 20:33:06,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:06,705 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:06,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-07-13 20:33:06,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:06,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472001764] [2021-07-13 20:33:06,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:06,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:06,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472001764] [2021-07-13 20:33:06,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472001764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:06,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285356542] [2021-07-13 20:33:06,967 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 [2021-07-13 20:33:07,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:07,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:07,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:33:07,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:07,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:07,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 20:33:07,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:07,451 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:33:07,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-13 20:33:07,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:07,468 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:33:07,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-13 20:33:07,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:07,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:07,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:33:07,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:07,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:07,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:33:07,556 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:124, output treesize:114 [2021-07-13 20:33:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:07,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285356542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:07,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:07,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-13 20:33:07,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085462650] [2021-07-13 20:33:07,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:33:07,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:07,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:33:07,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:33:07,723 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) [2021-07-13 20:33:08,005 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-07-13 20:33:08,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:08,520 INFO L93 Difference]: Finished difference Result 406 states and 1173 transitions. [2021-07-13 20:33:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:33:08,520 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 [2021-07-13 20:33:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:08,523 INFO L225 Difference]: With dead ends: 406 [2021-07-13 20:33:08,524 INFO L226 Difference]: Without dead ends: 391 [2021-07-13 20:33:08,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 897.6ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:33:08,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-07-13 20:33:08,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 229. [2021-07-13 20:33:08,539 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) [2021-07-13 20:33:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-07-13 20:33:08,541 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-07-13 20:33:08,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:08,541 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-07-13 20:33:08,541 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) [2021-07-13 20:33:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-07-13 20:33:08,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:33:08,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:08,544 INFO L508 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] [2021-07-13 20:33:08,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:08,769 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:08,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-07-13 20:33:08,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:08,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759675271] [2021-07-13 20:33:08,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:08,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:08,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759675271] [2021-07-13 20:33:08,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759675271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:08,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473010926] [2021-07-13 20:33:08,934 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 [2021-07-13 20:33:08,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:33:08,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:08,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:33:08,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:09,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:33:09,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:09,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:33:09,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:09,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 20:33:09,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:09,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:09,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:09,122 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:67, output treesize:15 [2021-07-13 20:33:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:09,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473010926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:09,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:09,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:33:09,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445108841] [2021-07-13 20:33:09,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:33:09,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:09,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:33:09,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:33:09,157 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) 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) [2021-07-13 20:33:09,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:09,420 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-07-13 20:33:09,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:33:09,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) 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 22 [2021-07-13 20:33:09,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:09,423 INFO L225 Difference]: With dead ends: 363 [2021-07-13 20:33:09,423 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 20:33:09,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:33:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 20:33:09,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-07-13 20:33:09,433 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) [2021-07-13 20:33:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-07-13 20:33:09,435 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-07-13 20:33:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:09,435 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-07-13 20:33:09,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) 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) [2021-07-13 20:33:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-07-13 20:33:09,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:33:09,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:09,439 INFO L508 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] [2021-07-13 20:33:09,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:09,653 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:09,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:09,653 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-07-13 20:33:09,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:09,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602130933] [2021-07-13 20:33:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:09,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:09,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602130933] [2021-07-13 20:33:09,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602130933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:09,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311330796] [2021-07-13 20:33:09,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:33:09,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:09,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:09,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:33:09,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:10,068 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:33:10,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-13 20:33:10,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:10,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:10,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:33:10,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:10,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:10,153 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:33:10,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-13 20:33:10,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:10,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:10,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 20:33:10,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:10,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:10,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:33:10,238 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:121, output treesize:71 [2021-07-13 20:33:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:10,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311330796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:10,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:10,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:33:10,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803860652] [2021-07-13 20:33:10,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:10,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:10,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:10,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:10,378 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) [2021-07-13 20:33:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:10,837 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-07-13 20:33:10,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:33:10,838 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 [2021-07-13 20:33:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:10,843 INFO L225 Difference]: With dead ends: 425 [2021-07-13 20:33:10,843 INFO L226 Difference]: Without dead ends: 410 [2021-07-13 20:33:10,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:33:10,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-13 20:33:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-07-13 20:33:10,854 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) [2021-07-13 20:33:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-07-13 20:33:10,855 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-07-13 20:33:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:10,857 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-07-13 20:33:10,858 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) [2021-07-13 20:33:10,858 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-07-13 20:33:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:10,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:10,859 INFO L508 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] [2021-07-13 20:33:11,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:11,073 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:11,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:11,073 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-07-13 20:33:11,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:11,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759094342] [2021-07-13 20:33:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:11,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:11,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759094342] [2021-07-13 20:33:11,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759094342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:11,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144343435] [2021-07-13 20:33:11,137 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 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 [2021-07-13 20:33:11,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:33:11,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:11,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:11,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:11,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144343435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:11,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:11,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:33:11,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285771363] [2021-07-13 20:33:11,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:33:11,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:11,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:33:11,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:33:11,259 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) [2021-07-13 20:33:11,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:11,709 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-07-13 20:33:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:33:11,709 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 [2021-07-13 20:33:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:11,715 INFO L225 Difference]: With dead ends: 619 [2021-07-13 20:33:11,715 INFO L226 Difference]: Without dead ends: 619 [2021-07-13 20:33:11,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:33:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-13 20:33:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-07-13 20:33:11,737 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) [2021-07-13 20:33:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-07-13 20:33:11,739 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-07-13 20:33:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:11,740 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-07-13 20:33:11,740 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) [2021-07-13 20:33:11,740 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-07-13 20:33:11,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:11,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:11,742 INFO L508 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] [2021-07-13 20:33:11,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:11,957 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:11,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-07-13 20:33:11,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:11,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541381564] [2021-07-13 20:33:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:12,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:12,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541381564] [2021-07-13 20:33:12,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541381564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:12,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189064091] [2021-07-13 20:33:12,009 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 [2021-07-13 20:33:12,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:33:12,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:12,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:12,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:12,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189064091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:12,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:12,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:33:12,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610998307] [2021-07-13 20:33:12,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:12,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:12,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:12,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:12,165 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) [2021-07-13 20:33:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:13,035 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-07-13 20:33:13,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:33:13,036 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 [2021-07-13 20:33:13,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:13,062 INFO L225 Difference]: With dead ends: 1078 [2021-07-13 20:33:13,062 INFO L226 Difference]: Without dead ends: 1078 [2021-07-13 20:33:13,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 496.2ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:33:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-13 20:33:13,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-07-13 20:33:13,078 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) [2021-07-13 20:33:13,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-07-13 20:33:13,079 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-07-13 20:33:13,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:13,080 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-07-13 20:33:13,080 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) [2021-07-13 20:33:13,080 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-07-13 20:33:13,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:13,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:13,081 INFO L508 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] [2021-07-13 20:33:13,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:13,295 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:13,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:13,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-07-13 20:33:13,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:13,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718225235] [2021-07-13 20:33:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:13,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:13,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718225235] [2021-07-13 20:33:13,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718225235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:13,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363129413] [2021-07-13 20:33:13,342 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 [2021-07-13 20:33:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:13,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:13,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:13,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363129413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:13,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:13,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:33:13,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291960786] [2021-07-13 20:33:13,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:13,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:13,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:13,489 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) [2021-07-13 20:33:14,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:14,242 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-07-13 20:33:14,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:33:14,249 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 [2021-07-13 20:33:14,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:14,255 INFO L225 Difference]: With dead ends: 951 [2021-07-13 20:33:14,255 INFO L226 Difference]: Without dead ends: 951 [2021-07-13 20:33:14,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 456.3ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:33:14,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-13 20:33:14,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-07-13 20:33:14,269 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) [2021-07-13 20:33:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-07-13 20:33:14,271 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-07-13 20:33:14,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:14,271 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-07-13 20:33:14,271 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) [2021-07-13 20:33:14,271 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-07-13 20:33:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:14,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:14,272 INFO L508 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] [2021-07-13 20:33:14,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:14,493 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:14,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:14,493 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-07-13 20:33:14,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:14,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689455946] [2021-07-13 20:33:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:33:14,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:14,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689455946] [2021-07-13 20:33:14,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689455946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:14,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789647676] [2021-07-13 20:33:14,534 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 [2021-07-13 20:33:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:14,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:33:14,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:33:14,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789647676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:14,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:14,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:33:14,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963597439] [2021-07-13 20:33:14,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:33:14,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:14,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:33:14,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:33:14,638 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) [2021-07-13 20:33:14,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:14,772 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-07-13 20:33:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:33:14,773 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 [2021-07-13 20:33:14,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:14,777 INFO L225 Difference]: With dead ends: 669 [2021-07-13 20:33:14,777 INFO L226 Difference]: Without dead ends: 663 [2021-07-13 20:33:14,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:14,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-07-13 20:33:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-07-13 20:33:14,790 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) [2021-07-13 20:33:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-07-13 20:33:14,792 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-07-13 20:33:14,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:14,793 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-07-13 20:33:14,793 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) [2021-07-13 20:33:14,793 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-07-13 20:33:14,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:14,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:14,794 INFO L508 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] [2021-07-13 20:33:15,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-13 20:33:15,013 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:15,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:15,013 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-07-13 20:33:15,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:15,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221092311] [2021-07-13 20:33:15,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:15,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:15,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221092311] [2021-07-13 20:33:15,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221092311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:15,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897274854] [2021-07-13 20:33:15,073 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 [2021-07-13 20:33:15,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:15,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:15,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:15,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:15,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897274854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:15,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:15,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:33:15,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644258810] [2021-07-13 20:33:15,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:15,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:15,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:15,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:15,201 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) [2021-07-13 20:33:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:15,387 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-07-13 20:33:15,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:33:15,388 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 [2021-07-13 20:33:15,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:15,392 INFO L225 Difference]: With dead ends: 710 [2021-07-13 20:33:15,392 INFO L226 Difference]: Without dead ends: 672 [2021-07-13 20:33:15,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:33:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-13 20:33:15,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-07-13 20:33:15,408 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) [2021-07-13 20:33:15,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-07-13 20:33:15,410 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-07-13 20:33:15,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:15,410 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-07-13 20:33:15,411 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) [2021-07-13 20:33:15,411 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-07-13 20:33:15,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:15,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:15,412 INFO L508 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] [2021-07-13 20:33:15,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:15,637 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:15,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:15,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-07-13 20:33:15,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:15,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805815754] [2021-07-13 20:33:15,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:33:15,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:15,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805815754] [2021-07-13 20:33:15,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805815754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:15,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804735659] [2021-07-13 20:33:15,668 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 [2021-07-13 20:33:15,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:15,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:15,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:33:15,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:33:15,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804735659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:15,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:15,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:33:15,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428241475] [2021-07-13 20:33:15,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:33:15,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:15,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:33:15,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:33:15,755 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) [2021-07-13 20:33:15,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:15,854 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-07-13 20:33:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:33:15,855 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 [2021-07-13 20:33:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:15,859 INFO L225 Difference]: With dead ends: 830 [2021-07-13 20:33:15,859 INFO L226 Difference]: Without dead ends: 830 [2021-07-13 20:33:15,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:15,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-13 20:33:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-07-13 20:33:15,877 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) [2021-07-13 20:33:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-07-13 20:33:15,879 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-07-13 20:33:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:15,879 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-07-13 20:33:15,880 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) [2021-07-13 20:33:15,880 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-07-13 20:33:15,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:15,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:15,881 INFO L508 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] [2021-07-13 20:33:16,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:16,097 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:16,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-07-13 20:33:16,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:16,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302558889] [2021-07-13 20:33:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:16,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:16,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302558889] [2021-07-13 20:33:16,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302558889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:16,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418003446] [2021-07-13 20:33:16,153 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 [2021-07-13 20:33:16,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:33:16,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:16,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:16,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:16,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418003446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:16,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:16,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:33:16,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019667735] [2021-07-13 20:33:16,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:33:16,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:16,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:33:16,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:33:16,272 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) [2021-07-13 20:33:16,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:16,613 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-07-13 20:33:16,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:33:16,614 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 [2021-07-13 20:33:16,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:16,620 INFO L225 Difference]: With dead ends: 1196 [2021-07-13 20:33:16,620 INFO L226 Difference]: Without dead ends: 1196 [2021-07-13 20:33:16,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:33:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-13 20:33:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-07-13 20:33:16,643 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) [2021-07-13 20:33:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-07-13 20:33:16,645 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-07-13 20:33:16,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:16,645 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-07-13 20:33:16,645 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) [2021-07-13 20:33:16,646 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-07-13 20:33:16,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:16,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:16,647 INFO L508 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] [2021-07-13 20:33:16,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:33:16,871 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:16,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:16,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-07-13 20:33:16,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:16,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88185478] [2021-07-13 20:33:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:16,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:16,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88185478] [2021-07-13 20:33:16,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88185478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:16,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122364783] [2021-07-13 20:33:16,915 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 [2021-07-13 20:33:16,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:16,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:16,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:16,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:17,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122364783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:17,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:17,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:33:17,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455936351] [2021-07-13 20:33:17,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:33:17,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:17,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:33:17,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:33:17,032 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) [2021-07-13 20:33:17,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:17,464 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-07-13 20:33:17,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:33:17,464 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 [2021-07-13 20:33:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:17,472 INFO L225 Difference]: With dead ends: 1492 [2021-07-13 20:33:17,473 INFO L226 Difference]: Without dead ends: 1492 [2021-07-13 20:33:17,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:33:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-07-13 20:33:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-07-13 20:33:17,502 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) [2021-07-13 20:33:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-07-13 20:33:17,504 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-07-13 20:33:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:17,504 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-07-13 20:33:17,505 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) [2021-07-13 20:33:17,505 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-07-13 20:33:17,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:17,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:17,507 INFO L508 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] [2021-07-13 20:33:17,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 20:33:17,732 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:17,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-07-13 20:33:17,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:17,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231137611] [2021-07-13 20:33:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:17,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:17,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231137611] [2021-07-13 20:33:17,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231137611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:17,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704420791] [2021-07-13 20:33:17,780 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 [2021-07-13 20:33:17,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:17,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:17,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:17,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704420791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:17,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:17,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:33:17,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312328715] [2021-07-13 20:33:17,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:17,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:17,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:17,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:17,924 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) [2021-07-13 20:33:18,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:18,194 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-07-13 20:33:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:33:18,194 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 [2021-07-13 20:33:18,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:18,201 INFO L225 Difference]: With dead ends: 1258 [2021-07-13 20:33:18,201 INFO L226 Difference]: Without dead ends: 1248 [2021-07-13 20:33:18,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:33:18,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-13 20:33:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-07-13 20:33:18,226 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) [2021-07-13 20:33:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-07-13 20:33:18,229 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-07-13 20:33:18,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:18,230 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-07-13 20:33:18,230 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) [2021-07-13 20:33:18,230 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-07-13 20:33:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:18,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:18,232 INFO L508 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] [2021-07-13 20:33:18,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 20:33:18,445 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:18,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:18,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-07-13 20:33:18,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:18,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784919314] [2021-07-13 20:33:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:18,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:18,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784919314] [2021-07-13 20:33:18,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784919314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:18,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227467634] [2021-07-13 20:33:18,486 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 [2021-07-13 20:33:18,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:33:18,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:18,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:18,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:18,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227467634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:18,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:18,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:33:18,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948450676] [2021-07-13 20:33:18,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:18,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:18,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:18,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:18,602 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) [2021-07-13 20:33:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:18,901 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-07-13 20:33:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:33:18,901 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 [2021-07-13 20:33:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:18,906 INFO L225 Difference]: With dead ends: 1329 [2021-07-13 20:33:18,907 INFO L226 Difference]: Without dead ends: 1329 [2021-07-13 20:33:18,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:33:18,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-13 20:33:18,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-07-13 20:33:18,928 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) [2021-07-13 20:33:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-07-13 20:33:18,931 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-07-13 20:33:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:18,932 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-07-13 20:33:18,932 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) [2021-07-13 20:33:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-07-13 20:33:18,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:18,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:18,934 INFO L508 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] [2021-07-13 20:33:19,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:19,149 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:19,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:19,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-07-13 20:33:19,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:19,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211895004] [2021-07-13 20:33:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:19,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:19,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211895004] [2021-07-13 20:33:19,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211895004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:19,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974187208] [2021-07-13 20:33:19,196 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 [2021-07-13 20:33:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:19,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:19,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:19,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974187208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:19,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:19,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:33:19,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735523361] [2021-07-13 20:33:19,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:33:19,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:19,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:33:19,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:33:19,283 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) [2021-07-13 20:33:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:19,677 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-07-13 20:33:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:33:19,677 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 [2021-07-13 20:33:19,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:19,685 INFO L225 Difference]: With dead ends: 1548 [2021-07-13 20:33:19,685 INFO L226 Difference]: Without dead ends: 1544 [2021-07-13 20:33:19,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:33:19,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-13 20:33:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-07-13 20:33:19,711 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) [2021-07-13 20:33:19,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-07-13 20:33:19,714 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-07-13 20:33:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:19,714 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-07-13 20:33:19,714 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) [2021-07-13 20:33:19,714 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-07-13 20:33:19,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:19,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:19,718 INFO L508 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] [2021-07-13 20:33:19,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:19,941 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:19,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:19,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-07-13 20:33:19,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:19,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971911157] [2021-07-13 20:33:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:19,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:19,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971911157] [2021-07-13 20:33:19,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971911157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:19,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400879643] [2021-07-13 20:33:19,985 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 [2021-07-13 20:33:20,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:20,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:20,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:20,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:20,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400879643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:20,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:20,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:33:20,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883170268] [2021-07-13 20:33:20,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:20,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:20,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:20,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:20,110 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) [2021-07-13 20:33:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:20,897 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-07-13 20:33:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:33:20,898 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 [2021-07-13 20:33:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:20,912 INFO L225 Difference]: With dead ends: 2734 [2021-07-13 20:33:20,912 INFO L226 Difference]: Without dead ends: 2734 [2021-07-13 20:33:20,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 477.3ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:33:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-07-13 20:33:20,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-07-13 20:33:20,948 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) [2021-07-13 20:33:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-07-13 20:33:20,951 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-07-13 20:33:20,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:20,951 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-07-13 20:33:20,951 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) [2021-07-13 20:33:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-07-13 20:33:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:20,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:20,954 INFO L508 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] [2021-07-13 20:33:21,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:21,171 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:21,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-07-13 20:33:21,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:21,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367726208] [2021-07-13 20:33:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:21,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:21,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367726208] [2021-07-13 20:33:21,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367726208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:21,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232120709] [2021-07-13 20:33:21,232 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 [2021-07-13 20:33:21,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:33:21,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:21,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:21,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:21,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232120709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:21,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:21,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:33:21,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736633211] [2021-07-13 20:33:21,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:21,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:21,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:21,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:21,357 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) [2021-07-13 20:33:22,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:22,124 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-07-13 20:33:22,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:33:22,124 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 [2021-07-13 20:33:22,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:22,133 INFO L225 Difference]: With dead ends: 2693 [2021-07-13 20:33:22,133 INFO L226 Difference]: Without dead ends: 2693 [2021-07-13 20:33:22,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 495.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:33:22,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-13 20:33:22,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-07-13 20:33:22,171 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) [2021-07-13 20:33:22,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-07-13 20:33:22,173 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-07-13 20:33:22,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:22,174 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-07-13 20:33:22,174 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) [2021-07-13 20:33:22,174 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-07-13 20:33:22,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:22,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:22,176 INFO L508 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] [2021-07-13 20:33:22,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:22,403 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:22,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-07-13 20:33:22,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:22,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459243679] [2021-07-13 20:33:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:22,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:22,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459243679] [2021-07-13 20:33:22,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459243679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:22,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741013293] [2021-07-13 20:33:22,450 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 [2021-07-13 20:33:22,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:22,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:22,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:22,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:22,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741013293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:22,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:22,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:33:22,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196252975] [2021-07-13 20:33:22,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:33:22,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:22,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:33:22,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:33:22,580 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) [2021-07-13 20:33:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:23,308 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-07-13 20:33:23,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:33:23,308 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 [2021-07-13 20:33:23,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:23,315 INFO L225 Difference]: With dead ends: 2677 [2021-07-13 20:33:23,315 INFO L226 Difference]: Without dead ends: 2677 [2021-07-13 20:33:23,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 427.8ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:33:23,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-13 20:33:23,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-07-13 20:33:23,353 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) [2021-07-13 20:33:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-07-13 20:33:23,356 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-07-13 20:33:23,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:23,356 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-07-13 20:33:23,356 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) [2021-07-13 20:33:23,356 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-07-13 20:33:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:23,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:23,359 INFO L508 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] [2021-07-13 20:33:23,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 20:33:23,573 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:23,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:23,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-07-13 20:33:23,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:23,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944535540] [2021-07-13 20:33:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:23,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:23,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944535540] [2021-07-13 20:33:23,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944535540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:23,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074183952] [2021-07-13 20:33:23,615 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 [2021-07-13 20:33:23,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:33:23,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:23,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:23,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:23,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074183952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:23,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:23,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:33:23,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175061509] [2021-07-13 20:33:23,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:33:23,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:23,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:33:23,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:33:23,734 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) [2021-07-13 20:33:24,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:24,361 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-07-13 20:33:24,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:33:24,361 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 [2021-07-13 20:33:24,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:24,367 INFO L225 Difference]: With dead ends: 2474 [2021-07-13 20:33:24,367 INFO L226 Difference]: Without dead ends: 2470 [2021-07-13 20:33:24,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 342.3ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:33:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-13 20:33:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-07-13 20:33:24,403 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) [2021-07-13 20:33:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-07-13 20:33:24,406 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-07-13 20:33:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:24,406 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-07-13 20:33:24,407 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) [2021-07-13 20:33:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-07-13 20:33:24,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:24,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:24,409 INFO L508 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] [2021-07-13 20:33:24,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:24,625 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:24,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:24,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-07-13 20:33:24,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:24,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757207593] [2021-07-13 20:33:24,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:24,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:24,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757207593] [2021-07-13 20:33:24,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757207593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:24,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193157271] [2021-07-13 20:33:24,662 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 [2021-07-13 20:33:24,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:33:24,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:24,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:24,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:24,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193157271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:24,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:24,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:33:24,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685199478] [2021-07-13 20:33:24,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:24,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:24,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:24,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:24,776 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:25,521 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-07-13 20:33:25,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:33:25,521 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:33:25,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:25,529 INFO L225 Difference]: With dead ends: 2514 [2021-07-13 20:33:25,529 INFO L226 Difference]: Without dead ends: 2514 [2021-07-13 20:33:25,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:33:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-07-13 20:33:25,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-07-13 20:33:25,577 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) [2021-07-13 20:33:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-07-13 20:33:25,581 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-07-13 20:33:25,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:25,582 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-07-13 20:33:25,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:25,582 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-07-13 20:33:25,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:25,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:25,584 INFO L508 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] [2021-07-13 20:33:25,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:33:25,810 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:25,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:25,810 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-07-13 20:33:25,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:25,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373124592] [2021-07-13 20:33:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:25,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:25,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373124592] [2021-07-13 20:33:25,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373124592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:25,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015045589] [2021-07-13 20:33:25,858 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 [2021-07-13 20:33:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:25,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:25,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:25,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015045589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:25,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:25,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:33:25,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472023698] [2021-07-13 20:33:25,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:25,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:25,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:25,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:25,978 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:26,747 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-07-13 20:33:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:33:26,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:33:26,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:26,759 INFO L225 Difference]: With dead ends: 2332 [2021-07-13 20:33:26,759 INFO L226 Difference]: Without dead ends: 2328 [2021-07-13 20:33:26,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:33:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-13 20:33:26,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-07-13 20:33:26,793 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) [2021-07-13 20:33:26,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-07-13 20:33:26,797 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-07-13 20:33:26,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:26,797 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-07-13 20:33:26,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:26,797 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-07-13 20:33:26,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:26,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:26,800 INFO L508 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] [2021-07-13 20:33:27,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:33:27,026 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:27,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:27,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-07-13 20:33:27,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:27,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465263077] [2021-07-13 20:33:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:33:27,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:27,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465263077] [2021-07-13 20:33:27,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465263077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:27,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436227142] [2021-07-13 20:33:27,056 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 [2021-07-13 20:33:27,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:33:27,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:27,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:33:27,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:33:27,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436227142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:27,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:27,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:33:27,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090906930] [2021-07-13 20:33:27,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:33:27,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:27,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:33:27,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:33:27,134 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) [2021-07-13 20:33:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:27,234 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-07-13 20:33:27,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:33:27,234 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 [2021-07-13 20:33:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:27,237 INFO L225 Difference]: With dead ends: 929 [2021-07-13 20:33:27,238 INFO L226 Difference]: Without dead ends: 929 [2021-07-13 20:33:27,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:33:27,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-13 20:33:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-07-13 20:33:27,254 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) [2021-07-13 20:33:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-07-13 20:33:27,257 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-07-13 20:33:27,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:27,257 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-07-13 20:33:27,257 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) [2021-07-13 20:33:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-07-13 20:33:27,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:27,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:27,260 INFO L508 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] [2021-07-13 20:33:27,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:27,473 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:27,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:27,473 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-07-13 20:33:27,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:27,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432928506] [2021-07-13 20:33:27,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:27,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:27,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432928506] [2021-07-13 20:33:27,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432928506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:27,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346339813] [2021-07-13 20:33:27,513 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 [2021-07-13 20:33:27,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:27,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:27,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:27,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:27,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346339813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:27,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:27,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:33:27,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928267726] [2021-07-13 20:33:27,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:33:27,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:27,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:33:27,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:33:27,597 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) [2021-07-13 20:33:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:27,866 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-07-13 20:33:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:33:27,866 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 [2021-07-13 20:33:27,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:27,870 INFO L225 Difference]: With dead ends: 1555 [2021-07-13 20:33:27,870 INFO L226 Difference]: Without dead ends: 1555 [2021-07-13 20:33:27,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:33:27,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-13 20:33:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-07-13 20:33:27,893 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) [2021-07-13 20:33:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-07-13 20:33:27,896 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-07-13 20:33:27,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:27,897 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-07-13 20:33:27,897 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) [2021-07-13 20:33:27,897 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-07-13 20:33:27,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:27,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:27,900 INFO L508 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] [2021-07-13 20:33:28,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:33:28,125 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:28,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:28,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-07-13 20:33:28,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:28,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371467373] [2021-07-13 20:33:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:28,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:28,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371467373] [2021-07-13 20:33:28,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371467373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:28,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911658007] [2021-07-13 20:33:28,160 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 [2021-07-13 20:33:28,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:33:28,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:28,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:28,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:28,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911658007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:28,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:28,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:33:28,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80156255] [2021-07-13 20:33:28,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:33:28,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:28,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:33:28,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:33:28,256 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) [2021-07-13 20:33:28,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:28,510 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-07-13 20:33:28,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:33:28,510 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 [2021-07-13 20:33:28,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:28,513 INFO L225 Difference]: With dead ends: 1605 [2021-07-13 20:33:28,514 INFO L226 Difference]: Without dead ends: 1605 [2021-07-13 20:33:28,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:33:28,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-13 20:33:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-07-13 20:33:28,531 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) [2021-07-13 20:33:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-07-13 20:33:28,548 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-07-13 20:33:28,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:28,548 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-07-13 20:33:28,548 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) [2021-07-13 20:33:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-07-13 20:33:28,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:28,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:28,550 INFO L508 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] [2021-07-13 20:33:28,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:28,754 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:28,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:28,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-07-13 20:33:28,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:28,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459340302] [2021-07-13 20:33:28,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:33:28,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:28,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459340302] [2021-07-13 20:33:28,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459340302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:28,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889210226] [2021-07-13 20:33:28,789 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 [2021-07-13 20:33:28,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:28,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:28,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:28,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:33:28,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889210226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:28,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:28,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:33:28,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706507834] [2021-07-13 20:33:28,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:33:28,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:28,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:33:28,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:33:28,870 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) [2021-07-13 20:33:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:29,064 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-07-13 20:33:29,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:33:29,065 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 [2021-07-13 20:33:29,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:29,067 INFO L225 Difference]: With dead ends: 1524 [2021-07-13 20:33:29,068 INFO L226 Difference]: Without dead ends: 1520 [2021-07-13 20:33:29,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:33:29,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-13 20:33:29,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-07-13 20:33:29,085 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) [2021-07-13 20:33:29,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-07-13 20:33:29,088 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-07-13 20:33:29,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:29,088 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-07-13 20:33:29,088 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) [2021-07-13 20:33:29,088 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-07-13 20:33:29,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:29,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:29,090 INFO L508 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] [2021-07-13 20:33:29,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-07-13 20:33:29,290 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:29,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:29,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-07-13 20:33:29,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:29,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147070750] [2021-07-13 20:33:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:29,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:29,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147070750] [2021-07-13 20:33:29,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147070750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:29,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211825736] [2021-07-13 20:33:29,327 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 [2021-07-13 20:33:29,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:33:29,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:29,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:29,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:29,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211825736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:29,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:29,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:33:29,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617682987] [2021-07-13 20:33:29,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:33:29,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:29,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:33:29,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:33:29,413 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) [2021-07-13 20:33:29,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:29,633 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-07-13 20:33:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:33:29,634 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 [2021-07-13 20:33:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:29,636 INFO L225 Difference]: With dead ends: 1508 [2021-07-13 20:33:29,636 INFO L226 Difference]: Without dead ends: 1496 [2021-07-13 20:33:29,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:33:29,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-07-13 20:33:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-07-13 20:33:29,654 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) [2021-07-13 20:33:29,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-07-13 20:33:29,656 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-07-13 20:33:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:29,656 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-07-13 20:33:29,656 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) [2021-07-13 20:33:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-07-13 20:33:29,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:29,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:29,658 INFO L508 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] [2021-07-13 20:33:29,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:29,859 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:29,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:29,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-07-13 20:33:29,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:29,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247933983] [2021-07-13 20:33:29,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:29,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:29,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247933983] [2021-07-13 20:33:29,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247933983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:29,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235708102] [2021-07-13 20:33:29,898 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 [2021-07-13 20:33:29,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:33:29,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:29,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:29,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:30,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235708102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:30,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:30,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:33:30,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798464525] [2021-07-13 20:33:30,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:30,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:30,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:30,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:30,005 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) [2021-07-13 20:33:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:30,525 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-07-13 20:33:30,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:33:30,525 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 [2021-07-13 20:33:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:30,530 INFO L225 Difference]: With dead ends: 2412 [2021-07-13 20:33:30,530 INFO L226 Difference]: Without dead ends: 2412 [2021-07-13 20:33:30,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:33:30,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-07-13 20:33:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-07-13 20:33:30,554 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) [2021-07-13 20:33:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-07-13 20:33:30,557 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-07-13 20:33:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:30,557 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-07-13 20:33:30,557 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) [2021-07-13 20:33:30,557 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-07-13 20:33:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:30,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:30,560 INFO L508 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] [2021-07-13 20:33:30,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-13 20:33:30,773 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:30,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:30,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-07-13 20:33:30,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:30,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012049360] [2021-07-13 20:33:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:30,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:30,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012049360] [2021-07-13 20:33:30,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012049360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:30,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254803012] [2021-07-13 20:33:30,818 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 [2021-07-13 20:33:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:30,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:30,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:30,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254803012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:30,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:30,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:33:30,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771558218] [2021-07-13 20:33:30,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:30,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:30,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:30,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:30,933 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) [2021-07-13 20:33:31,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:31,418 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-07-13 20:33:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:33:31,418 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 [2021-07-13 20:33:31,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:31,423 INFO L225 Difference]: With dead ends: 2335 [2021-07-13 20:33:31,423 INFO L226 Difference]: Without dead ends: 2335 [2021-07-13 20:33:31,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:33:31,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-07-13 20:33:31,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-07-13 20:33:31,442 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) [2021-07-13 20:33:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:33:31,444 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:33:31,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:31,445 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:33:31,445 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) [2021-07-13 20:33:31,445 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:33:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:31,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:31,446 INFO L508 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] [2021-07-13 20:33:31,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:31,648 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:31,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:31,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-07-13 20:33:31,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:31,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702171027] [2021-07-13 20:33:31,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:31,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:31,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702171027] [2021-07-13 20:33:31,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702171027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:31,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810096439] [2021-07-13 20:33:31,696 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 [2021-07-13 20:33:31,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:31,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:31,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:31,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:31,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810096439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:31,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:31,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:33:31,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524486055] [2021-07-13 20:33:31,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:33:31,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:31,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:33:31,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:33:31,796 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) [2021-07-13 20:33:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:32,218 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-07-13 20:33:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:33:32,219 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 [2021-07-13 20:33:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:32,223 INFO L225 Difference]: With dead ends: 2285 [2021-07-13 20:33:32,223 INFO L226 Difference]: Without dead ends: 2285 [2021-07-13 20:33:32,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:33:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-07-13 20:33:32,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-07-13 20:33:32,247 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) [2021-07-13 20:33:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:33:32,249 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:33:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:32,249 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:33:32,249 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) [2021-07-13 20:33:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:33:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:32,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:32,252 INFO L508 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] [2021-07-13 20:33:32,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-13 20:33:32,456 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:32,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-07-13 20:33:32,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:32,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533588075] [2021-07-13 20:33:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:32,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:32,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533588075] [2021-07-13 20:33:32,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533588075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:32,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000971626] [2021-07-13 20:33:32,492 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 [2021-07-13 20:33:32,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:33:32,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:32,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:32,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000971626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:32,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:32,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:33:32,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629846209] [2021-07-13 20:33:32,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:33:32,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:32,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:33:32,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:33:32,582 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) [2021-07-13 20:33:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:32,932 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-07-13 20:33:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:33:32,933 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 [2021-07-13 20:33:32,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:32,937 INFO L225 Difference]: With dead ends: 2176 [2021-07-13 20:33:32,937 INFO L226 Difference]: Without dead ends: 2172 [2021-07-13 20:33:32,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:33:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-13 20:33:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-07-13 20:33:32,959 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) [2021-07-13 20:33:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:33:32,961 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:33:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:32,961 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:33:32,961 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) [2021-07-13 20:33:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:33:32,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:32,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:32,963 INFO L508 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] [2021-07-13 20:33:33,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:33,164 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:33,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:33,164 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-07-13 20:33:33,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:33,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481612498] [2021-07-13 20:33:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:33,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:33,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481612498] [2021-07-13 20:33:33,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481612498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:33,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148175472] [2021-07-13 20:33:33,201 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 [2021-07-13 20:33:33,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:33,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:33,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:33,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:33,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148175472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:33,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:33,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:33:33,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663759010] [2021-07-13 20:33:33,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:33,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:33,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:33,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:33,303 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:33,694 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-07-13 20:33:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:33:33,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:33:33,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:33,698 INFO L225 Difference]: With dead ends: 2199 [2021-07-13 20:33:33,698 INFO L226 Difference]: Without dead ends: 2199 [2021-07-13 20:33:33,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:33:33,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-13 20:33:33,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-07-13 20:33:33,724 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) [2021-07-13 20:33:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:33:33,726 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:33:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:33,726 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:33:33,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:33,726 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:33:33,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:33,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:33,729 INFO L508 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] [2021-07-13 20:33:33,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-13 20:33:33,936 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:33,936 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-07-13 20:33:33,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:33,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455638194] [2021-07-13 20:33:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:33,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:33,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455638194] [2021-07-13 20:33:33,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455638194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:33,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274925044] [2021-07-13 20:33:33,974 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 [2021-07-13 20:33:34,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:33:34,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:34,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:34,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:34,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274925044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:34,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:34,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:33:34,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134861158] [2021-07-13 20:33:34,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:34,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:34,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:34,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:34,091 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:34,481 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-07-13 20:33:34,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:33:34,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:33:34,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:34,491 INFO L225 Difference]: With dead ends: 2156 [2021-07-13 20:33:34,491 INFO L226 Difference]: Without dead ends: 2152 [2021-07-13 20:33:34,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:33:34,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-13 20:33:34,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-07-13 20:33:34,521 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) [2021-07-13 20:33:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:33:34,525 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:33:34,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:34,525 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:33:34,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:34,525 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:33:34,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:34,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:34,528 INFO L508 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] [2021-07-13 20:33:34,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 20:33:34,741 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:34,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:34,741 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-07-13 20:33:34,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:34,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439810468] [2021-07-13 20:33:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:34,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:34,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439810468] [2021-07-13 20:33:34,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439810468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:34,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540620960] [2021-07-13 20:33:34,782 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 [2021-07-13 20:33:34,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:33:34,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:34,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:34,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:34,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540620960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:34,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:34,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:33:34,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778307567] [2021-07-13 20:33:34,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:33:34,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:34,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:33:34,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:33:34,871 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) [2021-07-13 20:33:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:35,217 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-07-13 20:33:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:33:35,217 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 [2021-07-13 20:33:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:35,221 INFO L225 Difference]: With dead ends: 2097 [2021-07-13 20:33:35,221 INFO L226 Difference]: Without dead ends: 2097 [2021-07-13 20:33:35,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:33:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-13 20:33:35,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-07-13 20:33:35,242 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) [2021-07-13 20:33:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-07-13 20:33:35,244 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-07-13 20:33:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:35,245 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-07-13 20:33:35,245 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) [2021-07-13 20:33:35,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-07-13 20:33:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:35,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:35,247 INFO L508 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] [2021-07-13 20:33:35,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-13 20:33:35,448 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:35,448 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-07-13 20:33:35,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:35,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318552413] [2021-07-13 20:33:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:35,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:35,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318552413] [2021-07-13 20:33:35,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318552413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:35,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643810147] [2021-07-13 20:33:35,486 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 [2021-07-13 20:33:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:35,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:35,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:35,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643810147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:35,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:35,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:33:35,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294310101] [2021-07-13 20:33:35,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:33:35,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:35,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:33:35,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:33:35,570 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) [2021-07-13 20:33:35,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:35,858 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-07-13 20:33:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:33:35,859 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 [2021-07-13 20:33:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:35,862 INFO L225 Difference]: With dead ends: 1963 [2021-07-13 20:33:35,862 INFO L226 Difference]: Without dead ends: 1959 [2021-07-13 20:33:35,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:33:35,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-07-13 20:33:35,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-07-13 20:33:35,888 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) [2021-07-13 20:33:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-07-13 20:33:35,891 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-07-13 20:33:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:35,891 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-07-13 20:33:35,891 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) [2021-07-13 20:33:35,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-07-13 20:33:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:35,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:35,894 INFO L508 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] [2021-07-13 20:33:36,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 20:33:36,116 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:36,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:36,116 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-07-13 20:33:36,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:36,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533472] [2021-07-13 20:33:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:36,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:36,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533472] [2021-07-13 20:33:36,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:36,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185778985] [2021-07-13 20:33:36,155 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 [2021-07-13 20:33:36,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:36,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:36,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:36,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185778985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:36,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:36,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:33:36,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927094269] [2021-07-13 20:33:36,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:33:36,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:36,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:33:36,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:33:36,232 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) [2021-07-13 20:33:36,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:36,459 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-07-13 20:33:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:33:36,459 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 [2021-07-13 20:33:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:36,463 INFO L225 Difference]: With dead ends: 1728 [2021-07-13 20:33:36,463 INFO L226 Difference]: Without dead ends: 1716 [2021-07-13 20:33:36,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:33:36,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-07-13 20:33:36,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-07-13 20:33:36,481 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) [2021-07-13 20:33:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-07-13 20:33:36,485 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-07-13 20:33:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:36,485 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-07-13 20:33:36,485 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) [2021-07-13 20:33:36,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-07-13 20:33:36,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:36,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:36,488 INFO L508 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] [2021-07-13 20:33:36,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:36,702 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:36,703 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-07-13 20:33:36,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:36,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622394410] [2021-07-13 20:33:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:36,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:36,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622394410] [2021-07-13 20:33:36,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622394410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:36,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797732370] [2021-07-13 20:33:36,743 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 [2021-07-13 20:33:36,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:33:36,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:36,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:36,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:36,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797732370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:36,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:36,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:33:36,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543932425] [2021-07-13 20:33:36,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:36,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:36,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:36,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:36,862 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:37,194 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-07-13 20:33:37,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:33:37,194 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:33:37,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:37,198 INFO L225 Difference]: With dead ends: 1821 [2021-07-13 20:33:37,198 INFO L226 Difference]: Without dead ends: 1821 [2021-07-13 20:33:37,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:33:37,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-13 20:33:37,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-07-13 20:33:37,224 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) [2021-07-13 20:33:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-07-13 20:33:37,228 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-07-13 20:33:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:37,228 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-07-13 20:33:37,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-07-13 20:33:37,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:37,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:37,231 INFO L508 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] [2021-07-13 20:33:37,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:37,454 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:37,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-07-13 20:33:37,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:37,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914427911] [2021-07-13 20:33:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:37,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:37,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914427911] [2021-07-13 20:33:37,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914427911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:37,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074846438] [2021-07-13 20:33:37,493 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 [2021-07-13 20:33:37,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:37,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:37,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:37,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:37,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074846438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:37,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:37,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:33:37,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959437181] [2021-07-13 20:33:37,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:33:37,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:37,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:33:37,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:33:37,593 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:37,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:37,915 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-07-13 20:33:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:33:37,915 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:33:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:37,919 INFO L225 Difference]: With dead ends: 1790 [2021-07-13 20:33:37,919 INFO L226 Difference]: Without dead ends: 1786 [2021-07-13 20:33:37,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:33:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-07-13 20:33:37,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-07-13 20:33:37,939 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) [2021-07-13 20:33:37,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-07-13 20:33:37,944 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-07-13 20:33:37,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:37,944 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-07-13 20:33:37,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:37,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-07-13 20:33:37,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:33:37,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:37,948 INFO L508 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] [2021-07-13 20:33:38,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-07-13 20:33:38,169 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:38,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:38,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-07-13 20:33:38,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:38,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224578320] [2021-07-13 20:33:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:38,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:38,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224578320] [2021-07-13 20:33:38,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224578320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:38,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867792716] [2021-07-13 20:33:38,207 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 [2021-07-13 20:33:38,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:33:38,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:38,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:33:38,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:38,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867792716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:38,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:38,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:33:38,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486948795] [2021-07-13 20:33:38,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:33:38,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:38,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:33:38,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:33:38,304 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:38,497 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-07-13 20:33:38,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:33:38,497 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 [2021-07-13 20:33:38,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:38,500 INFO L225 Difference]: With dead ends: 1649 [2021-07-13 20:33:38,501 INFO L226 Difference]: Without dead ends: 1637 [2021-07-13 20:33:38,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:33:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-07-13 20:33:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-07-13 20:33:38,518 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) [2021-07-13 20:33:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-07-13 20:33:38,521 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-07-13 20:33:38,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:38,521 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-07-13 20:33:38,521 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) [2021-07-13 20:33:38,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-07-13 20:33:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:38,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:38,523 INFO L508 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] [2021-07-13 20:33:38,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:38,724 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:38,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:38,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-07-13 20:33:38,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:38,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381248146] [2021-07-13 20:33:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:39,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:39,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381248146] [2021-07-13 20:33:39,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381248146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:39,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330634935] [2021-07-13 20:33:39,185 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 [2021-07-13 20:33:39,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:39,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:39,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:33:39,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:39,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:33:39,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:33:39,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:33:39,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,750 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 21 treesize of output 13 [2021-07-13 20:33:39,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,760 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 33 treesize of output 19 [2021-07-13 20:33:39,761 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:33:39,773 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:33:39,782 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:33:39,793 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:33:39,799 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:33:39,806 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16 [2021-07-13 20:33:39,813 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13 [2021-07-13 20:33:39,820 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-07-13 20:33:39,827 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,838 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 30 treesize of output 13 [2021-07-13 20:33:39,839 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:39,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:39,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:33:39,846 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:39,873 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:33:39,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:39,875 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-07-13 20:33:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:39,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330634935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:39,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:39,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:33:39,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008243016] [2021-07-13 20:33:39,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:33:39,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:39,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:33:39,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:33:39,910 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) [2021-07-13 20:33:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:40,661 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-07-13 20:33:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:33:40,662 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 [2021-07-13 20:33:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:40,665 INFO L225 Difference]: With dead ends: 1517 [2021-07-13 20:33:40,665 INFO L226 Difference]: Without dead ends: 1502 [2021-07-13 20:33:40,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1080.7ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:33:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-07-13 20:33:40,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-07-13 20:33:40,679 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) [2021-07-13 20:33:40,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-07-13 20:33:40,682 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-07-13 20:33:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:40,682 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-07-13 20:33:40,682 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) [2021-07-13 20:33:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-07-13 20:33:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:40,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:40,684 INFO L508 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] [2021-07-13 20:33:40,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:40,885 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:40,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:40,885 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-07-13 20:33:40,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:40,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329407406] [2021-07-13 20:33:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:41,228 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-07-13 20:33:41,356 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-07-13 20:33:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:41,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:41,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329407406] [2021-07-13 20:33:41,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329407406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:41,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346621859] [2021-07-13 20:33:41,525 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 [2021-07-13 20:33:41,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:33:41,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:41,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:33:41,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:42,029 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-07-13 20:33:42,085 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-07-13 20:33:42,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:33:42,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,236 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-07-13 20:33:42,237 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-07-13 20:33:42,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:33:42,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:42,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:42,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:42,280 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 23 treesize of output 13 [2021-07-13 20:33:42,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:42,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:42,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:42,309 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:15 [2021-07-13 20:33:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:42,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346621859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:42,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:42,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:33:42,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217970657] [2021-07-13 20:33:42,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:33:42,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:42,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:33:42,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:33:42,348 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:43,330 INFO L93 Difference]: Finished difference Result 1714 states and 5519 transitions. [2021-07-13 20:33:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:33:43,330 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 [2021-07-13 20:33:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:43,334 INFO L225 Difference]: With dead ends: 1714 [2021-07-13 20:33:43,334 INFO L226 Difference]: Without dead ends: 1684 [2021-07-13 20:33:43,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1482.0ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:33:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-07-13 20:33:43,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1168. [2021-07-13 20:33:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.348757497857755) internal successors, (3908), 1167 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:43,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3908 transitions. [2021-07-13 20:33:43,355 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3908 transitions. Word has length 26 [2021-07-13 20:33:43,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:43,356 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3908 transitions. [2021-07-13 20:33:43,356 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) [2021-07-13 20:33:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3908 transitions. [2021-07-13 20:33:43,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:43,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:43,358 INFO L508 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] [2021-07-13 20:33:43,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:43,559 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:43,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:43,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-07-13 20:33:43,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:43,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198806011] [2021-07-13 20:33:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:43,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:43,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198806011] [2021-07-13 20:33:43,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198806011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:43,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036289902] [2021-07-13 20:33:43,997 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 [2021-07-13 20:33:44,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:33:44,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:44,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:33:44,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:44,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:33:44,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:33:44,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:33:44,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:33:44,836 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,850 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 34 treesize of output 16 [2021-07-13 20:33:44,851 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:33:44,865 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:33:44,877 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:33:44,893 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:33:44,905 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:33:44,917 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:33:44,928 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,939 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:33:44,941 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,951 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 39 treesize of output 16 [2021-07-13 20:33:44,952 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:33:44,965 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:44,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:44,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:33:44,973 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:44,995 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:33:44,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:44,997 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-13 20:33:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:45,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036289902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:45,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:45,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:33:45,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67437616] [2021-07-13 20:33:45,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:33:45,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:45,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:33:45,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:33:45,028 INFO L87 Difference]: Start difference. First operand 1168 states and 3908 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) [2021-07-13 20:33:46,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:46,682 INFO L93 Difference]: Finished difference Result 1625 states and 5243 transitions. [2021-07-13 20:33:46,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:33:46,682 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 [2021-07-13 20:33:46,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:46,685 INFO L225 Difference]: With dead ends: 1625 [2021-07-13 20:33:46,685 INFO L226 Difference]: Without dead ends: 1610 [2021-07-13 20:33:46,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1772.6ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:33:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-07-13 20:33:46,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1198. [2021-07-13 20:33:46,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.3333333333333335) internal successors, (3990), 1197 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3990 transitions. [2021-07-13 20:33:46,714 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3990 transitions. Word has length 26 [2021-07-13 20:33:46,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:46,714 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3990 transitions. [2021-07-13 20:33:46,714 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) [2021-07-13 20:33:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3990 transitions. [2021-07-13 20:33:46,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:46,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:46,716 INFO L508 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] [2021-07-13 20:33:46,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-13 20:33:46,917 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:46,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-07-13 20:33:46,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:46,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952037240] [2021-07-13 20:33:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:47,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:47,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952037240] [2021-07-13 20:33:47,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952037240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:47,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297371302] [2021-07-13 20:33:47,319 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 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 [2021-07-13 20:33:47,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:33:47,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:47,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:33:47,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:47,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,652 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:47,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:33:47,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:47,667 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 16 treesize of output 18 [2021-07-13 20:33:47,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,702 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:47,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:33:47,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:47,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 27 [2021-07-13 20:33:47,726 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:47,741 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 28 treesize of output 24 [2021-07-13 20:33:47,747 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,763 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:33:47,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 23 [2021-07-13 20:33:47,765 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,776 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:47,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:33:47,778 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,790 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:47,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:33:47,792 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,806 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:47,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 20:33:47,807 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,822 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:33:47,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 23 [2021-07-13 20:33:47,824 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,838 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:33:47,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:33:47,840 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,853 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:47,854 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 33 treesize of output 1 [2021-07-13 20:33:47,855 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,867 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:47,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:33:47,868 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,879 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:47,879 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 28 treesize of output 16 [2021-07-13 20:33:47,880 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,891 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:33:47,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:33:47,893 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:47,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:47,903 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:33:47,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:33:47,905 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:48,042 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-07-13 20:33:48,042 INFO L628 ElimStorePlain]: treesize reduction 16, result has 85.6 percent of original size [2021-07-13 20:33:48,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:33:48,044 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:95 [2021-07-13 20:33:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:48,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297371302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:48,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:48,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:33:48,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066526140] [2021-07-13 20:33:48,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:33:48,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:48,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:33:48,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:33:48,172 INFO L87 Difference]: Start difference. First operand 1198 states and 3990 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) [2021-07-13 20:33:48,588 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-07-13 20:33:49,262 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-07-13 20:33:49,883 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-07-13 20:33:50,062 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-07-13 20:33:50,225 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-07-13 20:33:50,402 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-07-13 20:33:50,598 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-07-13 20:33:51,100 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-07-13 20:33:51,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:51,434 INFO L93 Difference]: Finished difference Result 2145 states and 6707 transitions. [2021-07-13 20:33:51,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:33:51,435 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 [2021-07-13 20:33:51,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:51,439 INFO L225 Difference]: With dead ends: 2145 [2021-07-13 20:33:51,439 INFO L226 Difference]: Without dead ends: 2100 [2021-07-13 20:33:51,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 3014.7ms TimeCoverageRelationStatistics Valid=366, Invalid=2084, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:33:51,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-07-13 20:33:51,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1216. [2021-07-13 20:33:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 3.3390946502057615) internal successors, (4057), 1215 states have internal predecessors, (4057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 4057 transitions. [2021-07-13 20:33:51,474 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 4057 transitions. Word has length 26 [2021-07-13 20:33:51,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:51,474 INFO L482 AbstractCegarLoop]: Abstraction has 1216 states and 4057 transitions. [2021-07-13 20:33:51,475 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) [2021-07-13 20:33:51,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 4057 transitions. [2021-07-13 20:33:51,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:51,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:51,478 INFO L508 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] [2021-07-13 20:33:51,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:51,692 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:51,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:51,692 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-07-13 20:33:51,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:51,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317507550] [2021-07-13 20:33:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:52,073 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-13 20:33:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:52,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:52,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317507550] [2021-07-13 20:33:52,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317507550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:52,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397788994] [2021-07-13 20:33:52,178 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 [2021-07-13 20:33:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:52,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:33:52,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:52,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:33:52,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:52,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,926 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 32 treesize of output 16 [2021-07-13 20:33:52,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:52,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:33:52,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:33:52,949 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:52,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:33:52,961 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:52,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:33:52,973 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:52,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,984 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:33:52,985 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:52,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:33:52,996 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:53,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:33:53,010 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:53,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:33:53,022 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:53,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:33:53,033 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:53,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,043 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 28 treesize of output 13 [2021-07-13 20:33:53,044 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:53,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:33:53,055 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:53,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:33:53,065 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:33:53,073 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:53,096 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:33:53,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:53,097 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-13 20:33:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:53,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397788994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:53,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:53,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:33:53,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486193957] [2021-07-13 20:33:53,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:33:53,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:53,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:33:53,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:33:53,129 INFO L87 Difference]: Start difference. First operand 1216 states and 4057 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) [2021-07-13 20:33:54,358 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-07-13 20:33:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:56,161 INFO L93 Difference]: Finished difference Result 1915 states and 6096 transitions. [2021-07-13 20:33:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:33:56,161 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 [2021-07-13 20:33:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:56,166 INFO L225 Difference]: With dead ends: 1915 [2021-07-13 20:33:56,167 INFO L226 Difference]: Without dead ends: 1900 [2021-07-13 20:33:56,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3104.2ms TimeCoverageRelationStatistics Valid=500, Invalid=2362, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:33:56,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2021-07-13 20:33:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1227. [2021-07-13 20:33:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 3.3450244698205545) internal successors, (4101), 1226 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 4101 transitions. [2021-07-13 20:33:56,191 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 4101 transitions. Word has length 26 [2021-07-13 20:33:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:56,191 INFO L482 AbstractCegarLoop]: Abstraction has 1227 states and 4101 transitions. [2021-07-13 20:33:56,191 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) [2021-07-13 20:33:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 4101 transitions. [2021-07-13 20:33:56,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:56,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:56,194 INFO L508 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] [2021-07-13 20:33:56,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:56,395 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:56,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:56,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-07-13 20:33:56,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:56,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027670257] [2021-07-13 20:33:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:56,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:56,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027670257] [2021-07-13 20:33:56,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027670257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:56,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342331367] [2021-07-13 20:33:56,784 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 [2021-07-13 20:33:56,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:56,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:56,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:33:56,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:57,641 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:33:57,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-07-13 20:33:57,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:57,708 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:33:57,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-07-13 20:33:57,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:57,759 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:33:57,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-07-13 20:33:57,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:57,809 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:33:57,809 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 35 treesize of output 47 [2021-07-13 20:33:57,818 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:57,853 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-07-13 20:33:57,853 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:33:57,855 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:57,877 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:33:57,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-07-13 20:33:57,878 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:57,924 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-13 20:33:57,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-07-13 20:33:57,943 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:57,994 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:33:57,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-07-13 20:33:58,006 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:58,057 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-07-13 20:33:58,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:33:58,060 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:58,111 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:33:58,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 45 [2021-07-13 20:33:58,125 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:58,168 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:33:58,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-07-13 20:33:58,177 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:58,198 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:33:58,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-07-13 20:33:58,199 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:58,240 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:33:58,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-07-13 20:33:58,247 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:58,268 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:33:58,268 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 31 treesize of output 1 [2021-07-13 20:33:58,269 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:58,309 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:33:58,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-07-13 20:33:58,319 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:58,362 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:33:58,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-07-13 20:33:58,373 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:58,712 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2021-07-13 20:33:58,713 INFO L628 ElimStorePlain]: treesize reduction 296, result has 49.5 percent of original size [2021-07-13 20:33:58,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:33:58,730 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:833, output treesize:341 [2021-07-13 20:33:59,018 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-07-13 20:33:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:59,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342331367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:59,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:59,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:33:59,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886752224] [2021-07-13 20:33:59,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:33:59,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:59,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:33:59,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:33:59,190 INFO L87 Difference]: Start difference. First operand 1227 states and 4101 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) [2021-07-13 20:34:00,864 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-07-13 20:34:01,105 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-07-13 20:34:01,571 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-07-13 20:34:01,994 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-07-13 20:34:02,478 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2021-07-13 20:34:02,779 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2021-07-13 20:34:03,014 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-13 20:34:03,357 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2021-07-13 20:34:03,753 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2021-07-13 20:34:03,952 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 37 [2021-07-13 20:34:04,130 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-13 20:34:04,298 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-13 20:34:04,426 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-07-13 20:34:04,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:04,526 INFO L93 Difference]: Finished difference Result 2515 states and 7728 transitions. [2021-07-13 20:34:04,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:34:04,526 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 [2021-07-13 20:34:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:04,531 INFO L225 Difference]: With dead ends: 2515 [2021-07-13 20:34:04,531 INFO L226 Difference]: Without dead ends: 2470 [2021-07-13 20:34:04,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 5424.2ms TimeCoverageRelationStatistics Valid=695, Invalid=3727, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:34:04,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-13 20:34:04,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 1399. [2021-07-13 20:34:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.3125894134477827) internal successors, (4631), 1398 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4631 transitions. [2021-07-13 20:34:04,562 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4631 transitions. Word has length 26 [2021-07-13 20:34:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:04,562 INFO L482 AbstractCegarLoop]: Abstraction has 1399 states and 4631 transitions. [2021-07-13 20:34:04,562 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) [2021-07-13 20:34:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4631 transitions. [2021-07-13 20:34:04,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:04,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:04,565 INFO L508 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] [2021-07-13 20:34:04,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-07-13 20:34:04,765 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:04,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:04,766 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-07-13 20:34:04,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:04,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891350620] [2021-07-13 20:34:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:05,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:05,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891350620] [2021-07-13 20:34:05,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891350620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:05,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856688113] [2021-07-13 20:34:05,105 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 [2021-07-13 20:34:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:05,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:34:05,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:05,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:34:05,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:05,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 13 [2021-07-13 20:34:05,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:05,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,618 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 30 treesize of output 16 [2021-07-13 20:34:05,619 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:05,625 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:05,632 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13 [2021-07-13 20:34:05,640 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:05,648 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:05,655 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:34:05,663 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:05,669 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,675 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 33 treesize of output 19 [2021-07-13 20:34:05,676 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,682 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:34:05,683 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:05,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:05,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:34:05,687 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,708 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:34:05,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:05,709 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-07-13 20:34:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:05,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856688113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:05,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:05,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:34:05,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196344739] [2021-07-13 20:34:05,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:05,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:05,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:05,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:05,735 INFO L87 Difference]: Start difference. First operand 1399 states and 4631 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) [2021-07-13 20:34:06,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:06,676 INFO L93 Difference]: Finished difference Result 1804 states and 5851 transitions. [2021-07-13 20:34:06,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:34:06,676 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 [2021-07-13 20:34:06,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:06,681 INFO L225 Difference]: With dead ends: 1804 [2021-07-13 20:34:06,681 INFO L226 Difference]: Without dead ends: 1789 [2021-07-13 20:34:06,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1121.8ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:34:06,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2021-07-13 20:34:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1410. [2021-07-13 20:34:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.3101490418736694) internal successors, (4664), 1409 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:06,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4664 transitions. [2021-07-13 20:34:06,708 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4664 transitions. Word has length 26 [2021-07-13 20:34:06,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:06,708 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 4664 transitions. [2021-07-13 20:34:06,709 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) [2021-07-13 20:34:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4664 transitions. [2021-07-13 20:34:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:06,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:06,711 INFO L508 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] [2021-07-13 20:34:06,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-07-13 20:34:06,912 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:06,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-07-13 20:34:06,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:06,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768625410] [2021-07-13 20:34:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:07,213 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-07-13 20:34:07,355 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-07-13 20:34:07,476 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-07-13 20:34:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:07,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:07,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768625410] [2021-07-13 20:34:07,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768625410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:07,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959303587] [2021-07-13 20:34:07,524 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 [2021-07-13 20:34:07,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:07,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:07,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:34:07,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:07,992 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-07-13 20:34:08,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:08,152 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:34:08,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:08,179 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:34:08,179 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:34:08,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:08,522 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 125 [2021-07-13 20:34:08,522 INFO L628 ElimStorePlain]: treesize reduction 146, result has 72.2 percent of original size [2021-07-13 20:34:08,547 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:34:08,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:34:08,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:08,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:08,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 32 [2021-07-13 20:34:08,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:08,855 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 123 [2021-07-13 20:34:08,856 INFO L628 ElimStorePlain]: treesize reduction 31, result has 91.5 percent of original size [2021-07-13 20:34:08,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:08,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:34:08,884 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:09,017 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-13 20:34:09,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:09,039 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:34:09,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:34:09,041 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:09,169 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-13 20:34:09,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:09,192 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:34:09,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:34:09,200 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:09,326 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:34:09,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:09,362 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:34:09,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:34:09,379 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:09,504 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:34:09,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:09,525 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:34:09,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:34:09,527 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:09,641 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-13 20:34:09,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:09,660 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:34:09,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:34:09,662 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:09,771 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:34:09,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:09,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:34:09,786 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:331 [2021-07-13 20:34:09,957 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-07-13 20:34:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:10,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959303587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:10,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:10,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:34:10,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919071301] [2021-07-13 20:34:10,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:34:10,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:10,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:34:10,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:34:10,017 INFO L87 Difference]: Start difference. First operand 1410 states and 4664 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) [2021-07-13 20:34:10,608 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-07-13 20:34:11,006 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2021-07-13 20:34:11,219 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2021-07-13 20:34:11,658 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:34:11,909 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-07-13 20:34:12,319 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-07-13 20:34:12,652 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-07-13 20:34:13,129 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-07-13 20:34:13,648 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-07-13 20:34:13,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:13,840 INFO L93 Difference]: Finished difference Result 2138 states and 6778 transitions. [2021-07-13 20:34:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:34:13,840 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 [2021-07-13 20:34:13,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:13,844 INFO L225 Difference]: With dead ends: 2138 [2021-07-13 20:34:13,844 INFO L226 Difference]: Without dead ends: 2108 [2021-07-13 20:34:13,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 4127.4ms TimeCoverageRelationStatistics Valid=295, Invalid=1685, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:34:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-07-13 20:34:13,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1416. [2021-07-13 20:34:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.3123674911660776) internal successors, (4687), 1415 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) [2021-07-13 20:34:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4687 transitions. [2021-07-13 20:34:13,872 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4687 transitions. Word has length 26 [2021-07-13 20:34:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:13,872 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4687 transitions. [2021-07-13 20:34:13,872 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) [2021-07-13 20:34:13,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4687 transitions. [2021-07-13 20:34:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:13,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:13,875 INFO L508 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] [2021-07-13 20:34:14,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-07-13 20:34:14,076 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:14,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-07-13 20:34:14,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:14,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394777280] [2021-07-13 20:34:14,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:14,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:14,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394777280] [2021-07-13 20:34:14,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394777280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:14,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705395591] [2021-07-13 20:34:14,318 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 [2021-07-13 20:34:14,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:34:14,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:14,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:34:14,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:15,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:15,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:15,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:34:15,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:15,156 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-07-13 20:34:15,157 INFO L628 ElimStorePlain]: treesize reduction 130, result has 44.0 percent of original size [2021-07-13 20:34:15,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:15,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:34:15,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:15,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:15,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:15,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:15,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:34:15,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:15,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:15,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:15,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:15,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:34:15,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:15,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:15,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:34:15,264 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:29 [2021-07-13 20:34:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:15,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705395591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:15,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:15,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:34:15,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015240862] [2021-07-13 20:34:15,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:15,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:15,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:15,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:15,298 INFO L87 Difference]: Start difference. First operand 1416 states and 4687 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) [2021-07-13 20:34:15,926 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2021-07-13 20:34:16,186 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-07-13 20:34:16,369 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-07-13 20:34:16,768 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2021-07-13 20:34:16,950 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-07-13 20:34:17,254 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 84 [2021-07-13 20:34:17,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:17,379 INFO L93 Difference]: Finished difference Result 2242 states and 7149 transitions. [2021-07-13 20:34:17,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:34:17,379 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 [2021-07-13 20:34:17,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:17,384 INFO L225 Difference]: With dead ends: 2242 [2021-07-13 20:34:17,384 INFO L226 Difference]: Without dead ends: 2212 [2021-07-13 20:34:17,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2173.4ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:34:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-07-13 20:34:17,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1446. [2021-07-13 20:34:17,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.322491349480969) internal successors, (4801), 1445 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4801 transitions. [2021-07-13 20:34:17,414 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4801 transitions. Word has length 26 [2021-07-13 20:34:17,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:17,414 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4801 transitions. [2021-07-13 20:34:17,414 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) [2021-07-13 20:34:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4801 transitions. [2021-07-13 20:34:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:17,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:17,417 INFO L508 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] [2021-07-13 20:34:17,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-07-13 20:34:17,617 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:17,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:17,618 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-07-13 20:34:17,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:17,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136117644] [2021-07-13 20:34:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:17,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:17,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136117644] [2021-07-13 20:34:17,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136117644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:17,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084841845] [2021-07-13 20:34:17,919 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 [2021-07-13 20:34:17,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:17,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:17,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:34:17,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:18,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-07-13 20:34:18,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:34:18,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,369 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 28 treesize of output 16 [2021-07-13 20:34:18,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:18,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,382 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 21 treesize of output 13 [2021-07-13 20:34:18,383 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,389 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:34:18,390 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:18,396 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,403 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 26 treesize of output 13 [2021-07-13 20:34:18,404 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,410 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 33 treesize of output 19 [2021-07-13 20:34:18,411 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:18,419 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:18,427 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 13 [2021-07-13 20:34:18,436 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:18,443 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:18,451 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:18,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:18,455 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 30 treesize of output 13 [2021-07-13 20:34:18,456 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:18,480 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:34:18,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:18,482 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-07-13 20:34:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:18,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084841845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:18,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:18,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:34:18,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246858679] [2021-07-13 20:34:18,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:34:18,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:18,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:34:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:34:18,520 INFO L87 Difference]: Start difference. First operand 1446 states and 4801 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) [2021-07-13 20:34:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:19,290 INFO L93 Difference]: Finished difference Result 1753 states and 5743 transitions. [2021-07-13 20:34:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:34:19,290 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 [2021-07-13 20:34:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:19,294 INFO L225 Difference]: With dead ends: 1753 [2021-07-13 20:34:19,294 INFO L226 Difference]: Without dead ends: 1738 [2021-07-13 20:34:19,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 809.0ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:34:19,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-07-13 20:34:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1455. [2021-07-13 20:34:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.3266850068775793) internal successors, (4837), 1454 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:19,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4837 transitions. [2021-07-13 20:34:19,317 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4837 transitions. Word has length 26 [2021-07-13 20:34:19,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:19,318 INFO L482 AbstractCegarLoop]: Abstraction has 1455 states and 4837 transitions. [2021-07-13 20:34:19,318 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) [2021-07-13 20:34:19,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4837 transitions. [2021-07-13 20:34:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:19,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:19,321 INFO L508 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] [2021-07-13 20:34:19,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:19,521 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:19,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:19,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1130404249, now seen corresponding path program 11 times [2021-07-13 20:34:19,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:19,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968992787] [2021-07-13 20:34:19,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:19,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:19,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968992787] [2021-07-13 20:34:19,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968992787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:19,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527117101] [2021-07-13 20:34:19,745 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 [2021-07-13 20:34:19,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:34:19,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:19,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:19,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:20,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,186 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:20,186 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 30 treesize of output 20 [2021-07-13 20:34:20,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:20,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:34:20,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,221 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:20,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:34:20,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,234 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:20,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:20,235 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:20,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:34:20,249 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,259 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:20,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:20,259 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,270 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:20,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:20,271 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,285 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:20,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:34:20,286 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,296 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:20,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:20,297 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:20,310 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 30 treesize of output 24 [2021-07-13 20:34:20,314 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,324 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:20,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:20,325 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,336 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:20,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:34:20,337 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,347 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:20,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:20,348 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,358 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:20,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:20,358 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,368 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:20,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:20,369 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:20,378 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:20,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:34:20,380 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:20,481 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-07-13 20:34:20,482 INFO L628 ElimStorePlain]: treesize reduction 24, result has 82.5 percent of original size [2021-07-13 20:34:20,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:34:20,484 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:91 [2021-07-13 20:34:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:20,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527117101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:20,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:20,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:34:20,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102573088] [2021-07-13 20:34:20,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:34:20,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:20,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:34:20,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:34:20,580 INFO L87 Difference]: Start difference. First operand 1455 states and 4837 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) [2021-07-13 20:34:21,217 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-13 20:34:21,558 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-07-13 20:34:21,700 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-07-13 20:34:22,029 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-07-13 20:34:22,222 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-07-13 20:34:22,450 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-07-13 20:34:22,768 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-07-13 20:34:23,078 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-07-13 20:34:23,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:23,266 INFO L93 Difference]: Finished difference Result 2493 states and 7968 transitions. [2021-07-13 20:34:23,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:34:23,267 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 [2021-07-13 20:34:23,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:23,272 INFO L225 Difference]: With dead ends: 2493 [2021-07-13 20:34:23,272 INFO L226 Difference]: Without dead ends: 2463 [2021-07-13 20:34:23,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 2469.5ms TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:34:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-07-13 20:34:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1468. [2021-07-13 20:34:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3340149965916837) internal successors, (4891), 1467 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4891 transitions. [2021-07-13 20:34:23,303 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4891 transitions. Word has length 26 [2021-07-13 20:34:23,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:23,303 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4891 transitions. [2021-07-13 20:34:23,303 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) [2021-07-13 20:34:23,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4891 transitions. [2021-07-13 20:34:23,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:23,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:23,306 INFO L508 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] [2021-07-13 20:34:23,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-07-13 20:34:23,507 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:23,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:23,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1627125609, now seen corresponding path program 12 times [2021-07-13 20:34:23,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:23,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106294957] [2021-07-13 20:34:23,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:23,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:23,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106294957] [2021-07-13 20:34:23,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106294957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:23,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936370468] [2021-07-13 20:34:23,889 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 [2021-07-13 20:34:23,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:34:23,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:23,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:34:23,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:24,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:24,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 27 [2021-07-13 20:34:24,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,199 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:24,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:34:24,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:24,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-13 20:34:24,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,239 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:24,239 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 39 treesize of output 19 [2021-07-13 20:34:24,241 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,259 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:24,259 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:34:24,260 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,277 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:24,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:34:24,278 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,297 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:24,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-07-13 20:34:24,298 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,320 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:24,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-13 20:34:24,322 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,338 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:24,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:34:24,340 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,359 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:24,359 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 1 [2021-07-13 20:34:24,360 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,377 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:24,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 19 [2021-07-13 20:34:24,379 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,392 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:24,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16 [2021-07-13 20:34:24,395 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,408 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:24,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:34:24,409 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,421 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:24,421 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:34:24,423 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,440 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:24,440 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-13 20:34:24,442 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,452 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:24,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-07-13 20:34:24,453 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,526 INFO L628 ElimStorePlain]: treesize reduction 19, result has 82.2 percent of original size [2021-07-13 20:34:24,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:34:24,527 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:689, output treesize:88 [2021-07-13 20:34:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:24,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936370468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:24,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:24,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:34:24,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597506239] [2021-07-13 20:34:24,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:34:24,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:24,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:34:24,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:34:24,623 INFO L87 Difference]: Start difference. First operand 1468 states and 4891 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) [2021-07-13 20:34:26,283 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-07-13 20:34:26,404 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-07-13 20:34:26,792 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-07-13 20:34:27,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:27,211 INFO L93 Difference]: Finished difference Result 2313 states and 7429 transitions. [2021-07-13 20:34:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:34:27,212 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 [2021-07-13 20:34:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:27,216 INFO L225 Difference]: With dead ends: 2313 [2021-07-13 20:34:27,217 INFO L226 Difference]: Without dead ends: 2283 [2021-07-13 20:34:27,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2511.0ms TimeCoverageRelationStatistics Valid=388, Invalid=1868, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:34:27,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2021-07-13 20:34:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 1477. [2021-07-13 20:34:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.3401084010840107) internal successors, (4930), 1476 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4930 transitions. [2021-07-13 20:34:27,243 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4930 transitions. Word has length 26 [2021-07-13 20:34:27,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:27,243 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 4930 transitions. [2021-07-13 20:34:27,243 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) [2021-07-13 20:34:27,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4930 transitions. [2021-07-13 20:34:27,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:27,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:27,245 INFO L508 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] [2021-07-13 20:34:27,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-07-13 20:34:27,448 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:27,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:27,448 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-07-13 20:34:27,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:27,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759805789] [2021-07-13 20:34:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:27,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:27,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759805789] [2021-07-13 20:34:27,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759805789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:27,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417819392] [2021-07-13 20:34:27,793 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 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 [2021-07-13 20:34:27,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:34:27,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:27,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:34:27,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:28,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:34:28,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:34:28,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:34:28,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:34:28,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:34:28,539 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:34:28,550 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:34:28,559 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,568 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 41 treesize of output 13 [2021-07-13 20:34:28,569 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,577 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 30 treesize of output 16 [2021-07-13 20:34:28,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,586 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 35 treesize of output 19 [2021-07-13 20:34:28,587 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:34:28,596 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:34:28,605 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:34:28,613 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:34:28,622 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:28,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:28,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:34:28,627 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:28,647 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:34:28,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:28,648 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-13 20:34:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:28,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417819392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:28,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:28,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:34:28,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809680677] [2021-07-13 20:34:28,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:34:28,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:28,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:34:28,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:34:28,680 INFO L87 Difference]: Start difference. First operand 1477 states and 4930 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:29,451 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-07-13 20:34:29,951 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-07-13 20:34:30,282 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-07-13 20:34:30,630 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-07-13 20:34:31,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:31,975 INFO L93 Difference]: Finished difference Result 3323 states and 10316 transitions. [2021-07-13 20:34:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:34:31,976 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:31,984 INFO L225 Difference]: With dead ends: 3323 [2021-07-13 20:34:31,984 INFO L226 Difference]: Without dead ends: 3278 [2021-07-13 20:34:31,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 3153.4ms TimeCoverageRelationStatistics Valid=670, Invalid=3362, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:34:31,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3278 states. [2021-07-13 20:34:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3278 to 1496. [2021-07-13 20:34:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3578595317725752) internal successors, (5020), 1495 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5020 transitions. [2021-07-13 20:34:32,024 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5020 transitions. Word has length 26 [2021-07-13 20:34:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:32,024 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5020 transitions. [2021-07-13 20:34:32,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5020 transitions. [2021-07-13 20:34:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:32,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:32,027 INFO L508 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] [2021-07-13 20:34:32,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:32,228 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:32,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:32,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-07-13 20:34:32,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:32,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772778034] [2021-07-13 20:34:32,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:32,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:32,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772778034] [2021-07-13 20:34:32,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772778034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:32,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125656079] [2021-07-13 20:34:32,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:32,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:32,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:32,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:34:32,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:33,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:34:33,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:34:33,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:34:33,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:34:33,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:34:33,229 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:34:33,239 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:34:33,249 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:34:33,260 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:34:33,270 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:34:33,279 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:34:33,287 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,294 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 33 treesize of output 13 [2021-07-13 20:34:33,295 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,303 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 37 treesize of output 19 [2021-07-13 20:34:33,303 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:34:33,311 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:34:33,316 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,336 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:34:33,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:33,337 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-13 20:34:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:33,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125656079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:33,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:33,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:34:33,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955274378] [2021-07-13 20:34:33,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:34:33,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:33,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:34:33,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:34:33,368 INFO L87 Difference]: Start difference. First operand 1496 states and 5020 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:34,314 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-07-13 20:34:34,866 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-07-13 20:34:35,493 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-07-13 20:34:36,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:36,529 INFO L93 Difference]: Finished difference Result 3094 states and 9789 transitions. [2021-07-13 20:34:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:34:36,529 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:36,535 INFO L225 Difference]: With dead ends: 3094 [2021-07-13 20:34:36,535 INFO L226 Difference]: Without dead ends: 3049 [2021-07-13 20:34:36,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2912.4ms TimeCoverageRelationStatistics Valid=602, Invalid=2704, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:34:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-07-13 20:34:36,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1496. [2021-07-13 20:34:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3585284280936456) internal successors, (5021), 1495 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) [2021-07-13 20:34:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5021 transitions. [2021-07-13 20:34:36,568 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5021 transitions. Word has length 26 [2021-07-13 20:34:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:36,568 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5021 transitions. [2021-07-13 20:34:36,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5021 transitions. [2021-07-13 20:34:36,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:36,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:36,571 INFO L508 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] [2021-07-13 20:34:36,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:36,772 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:36,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:36,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-07-13 20:34:36,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:36,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114214635] [2021-07-13 20:34:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:37,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:37,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114214635] [2021-07-13 20:34:37,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114214635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:37,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548930961] [2021-07-13 20:34:37,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:37,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:34:37,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:37,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:37,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:37,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,725 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:34:37,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-13 20:34:37,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:37,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,760 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-13 20:34:37,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 28 [2021-07-13 20:34:37,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:37,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,798 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:34:37,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-13 20:34:37,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:37,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,853 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:34:37,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:34:37,854 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:37,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,877 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:34:37,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:34:37,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:37,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,900 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:34:37,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:34:37,901 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:37,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,935 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:34:37,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 25 [2021-07-13 20:34:37,937 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:37,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:37,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 20:34:37,983 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:37,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:37,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,010 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:34:38,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-07-13 20:34:38,012 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:38,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,029 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:34:38,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-07-13 20:34:38,030 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:38,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,055 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-13 20:34:38,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-07-13 20:34:38,057 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:38,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,084 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:34:38,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:34:38,085 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:38,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,106 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:34:38,107 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 30 treesize of output 1 [2021-07-13 20:34:38,107 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:38,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,130 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:34:38,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:34:38,131 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:38,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,149 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:34:38,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:34:38,150 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:38,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,160 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:34:38,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:34:38,161 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:38,250 INFO L628 ElimStorePlain]: treesize reduction 52, result has 64.1 percent of original size [2021-07-13 20:34:38,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:34:38,252 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-07-13 20:34:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:38,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548930961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:38,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:38,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:34:38,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902171166] [2021-07-13 20:34:38,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:34:38,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:38,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:34:38,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:34:38,337 INFO L87 Difference]: Start difference. First operand 1496 states and 5021 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:38,789 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-07-13 20:34:39,214 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-07-13 20:34:39,776 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-07-13 20:34:40,397 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-07-13 20:34:41,109 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-07-13 20:34:41,264 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-07-13 20:34:41,528 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-07-13 20:34:42,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:42,102 INFO L93 Difference]: Finished difference Result 3560 states and 11117 transitions. [2021-07-13 20:34:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:34:42,102 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:42,109 INFO L225 Difference]: With dead ends: 3560 [2021-07-13 20:34:42,109 INFO L226 Difference]: Without dead ends: 3500 [2021-07-13 20:34:42,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 3425.2ms TimeCoverageRelationStatistics Valid=813, Invalid=3347, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:34:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-07-13 20:34:42,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 1512. [2021-07-13 20:34:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.370615486432826) internal successors, (5093), 1511 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5093 transitions. [2021-07-13 20:34:42,147 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5093 transitions. Word has length 26 [2021-07-13 20:34:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:42,147 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5093 transitions. [2021-07-13 20:34:42,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:42,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5093 transitions. [2021-07-13 20:34:42,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:42,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:42,150 INFO L508 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] [2021-07-13 20:34:42,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:42,351 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:42,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:42,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-07-13 20:34:42,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:42,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402341579] [2021-07-13 20:34:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:42,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:42,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402341579] [2021-07-13 20:34:42,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402341579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:42,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916736535] [2021-07-13 20:34:42,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:42,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:34:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:43,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,224 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 30 treesize of output 16 [2021-07-13 20:34:43,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:34:43,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:43,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:43,244 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:34:43,250 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:43,256 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,263 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 30 treesize of output 13 [2021-07-13 20:34:43,264 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:34:43,274 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:34:43,284 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:43,291 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:43,299 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:43,306 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,311 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 13 [2021-07-13 20:34:43,312 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:43,318 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:43,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:43,322 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,341 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:34:43,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:43,343 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-07-13 20:34:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:43,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916736535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:43,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:43,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:34:43,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011835231] [2021-07-13 20:34:43,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:43,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:43,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:43,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:43,367 INFO L87 Difference]: Start difference. First operand 1512 states and 5093 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) [2021-07-13 20:34:44,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:44,028 INFO L93 Difference]: Finished difference Result 1895 states and 6252 transitions. [2021-07-13 20:34:44,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:34:44,029 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 [2021-07-13 20:34:44,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:44,033 INFO L225 Difference]: With dead ends: 1895 [2021-07-13 20:34:44,033 INFO L226 Difference]: Without dead ends: 1880 [2021-07-13 20:34:44,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 985.1ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:34:44,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-07-13 20:34:44,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1520. [2021-07-13 20:34:44,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.366688610928242) internal successors, (5114), 1519 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:44,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 5114 transitions. [2021-07-13 20:34:44,069 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 5114 transitions. Word has length 26 [2021-07-13 20:34:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:44,069 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 5114 transitions. [2021-07-13 20:34:44,069 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) [2021-07-13 20:34:44,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 5114 transitions. [2021-07-13 20:34:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:44,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:44,073 INFO L508 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] [2021-07-13 20:34:44,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-07-13 20:34:44,294 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:44,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:44,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 14 times [2021-07-13 20:34:44,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:44,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795118597] [2021-07-13 20:34:44,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:44,464 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-13 20:34:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:44,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:44,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795118597] [2021-07-13 20:34:44,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795118597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:44,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309048829] [2021-07-13 20:34:44,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:44,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:44,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:44,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:44,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:45,117 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:34:45,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:34:45,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,129 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:34:45,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:45,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,140 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:34:45,140 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:45,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,150 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:34:45,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:45,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,162 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:34:45,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:45,163 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,173 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:34:45,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:45,174 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,194 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:34:45,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-07-13 20:34:45,197 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:45,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:34:45,218 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,239 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:34:45,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:34:45,243 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,253 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:34:45,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:45,254 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,276 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:34:45,277 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:34:45,278 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,292 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-07-13 20:34:45,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 19 [2021-07-13 20:34:45,293 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,304 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:34:45,304 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 33 treesize of output 19 [2021-07-13 20:34:45,305 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,315 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:34:45,316 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 30 treesize of output 1 [2021-07-13 20:34:45,316 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,326 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:34:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:45,327 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,334 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:34:45,334 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 30 treesize of output 1 [2021-07-13 20:34:45,335 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:45,461 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-07-13 20:34:45,461 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.4 percent of original size [2021-07-13 20:34:45,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:34:45,464 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:697, output treesize:177 [2021-07-13 20:34:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:45,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309048829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:45,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:45,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:34:45,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886099968] [2021-07-13 20:34:45,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:34:45,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:45,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:34:45,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:34:45,705 INFO L87 Difference]: Start difference. First operand 1520 states and 5114 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) [2021-07-13 20:34:46,594 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-07-13 20:34:46,786 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-07-13 20:34:47,021 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2021-07-13 20:34:47,337 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-07-13 20:34:47,579 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-07-13 20:34:47,790 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-07-13 20:34:48,290 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-07-13 20:34:48,721 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-07-13 20:34:48,871 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2021-07-13 20:34:48,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:48,963 INFO L93 Difference]: Finished difference Result 2084 states and 6791 transitions. [2021-07-13 20:34:48,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:34:48,963 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 [2021-07-13 20:34:48,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:48,967 INFO L225 Difference]: With dead ends: 2084 [2021-07-13 20:34:48,967 INFO L226 Difference]: Without dead ends: 2069 [2021-07-13 20:34:48,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3315.8ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:34:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-07-13 20:34:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1516. [2021-07-13 20:34:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.3755775577557756) internal successors, (5114), 1515 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5114 transitions. [2021-07-13 20:34:48,994 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5114 transitions. Word has length 26 [2021-07-13 20:34:48,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:48,995 INFO L482 AbstractCegarLoop]: Abstraction has 1516 states and 5114 transitions. [2021-07-13 20:34:48,995 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) [2021-07-13 20:34:48,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5114 transitions. [2021-07-13 20:34:48,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:48,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:48,998 INFO L508 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] [2021-07-13 20:34:49,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-07-13 20:34:49,199 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:49,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:49,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1175939077, now seen corresponding path program 15 times [2021-07-13 20:34:49,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:49,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248478033] [2021-07-13 20:34:49,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:49,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:49,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248478033] [2021-07-13 20:34:49,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248478033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:49,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478609650] [2021-07-13 20:34:49,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:49,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:34:49,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:49,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:34:49,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:49,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:49,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:49,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 24 [2021-07-13 20:34:49,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:49,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:49,866 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:49,866 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 28 treesize of output 16 [2021-07-13 20:34:49,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:49,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:49,880 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:49,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:34:49,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:49,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:49,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:49,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:34:49,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:49,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:49,907 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:49,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:49,908 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:49,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:49,943 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:49,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:49,944 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:49,954 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:49,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:49,955 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:49,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:49,965 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:49,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-07-13 20:34:49,966 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:49,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:49,979 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:49,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-07-13 20:34:49,981 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:49,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:49,994 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:49,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:34:49,996 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:50,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:34:50,011 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,020 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:50,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:50,021 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,030 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:50,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:34:50,031 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,039 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:50,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:50,040 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,051 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:50,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:34:50,053 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,059 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:34:50,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:50,060 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:50,140 INFO L628 ElimStorePlain]: treesize reduction 60, result has 57.4 percent of original size [2021-07-13 20:34:50,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:34:50,143 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:71 [2021-07-13 20:34:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:50,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478609650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:50,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:50,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:34:50,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34868465] [2021-07-13 20:34:50,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:34:50,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:50,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:34:50,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:34:50,238 INFO L87 Difference]: Start difference. First operand 1516 states and 5114 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) [2021-07-13 20:34:50,722 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-07-13 20:34:51,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:51,370 INFO L93 Difference]: Finished difference Result 2050 states and 6744 transitions. [2021-07-13 20:34:51,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:34:51,370 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 [2021-07-13 20:34:51,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:51,374 INFO L225 Difference]: With dead ends: 2050 [2021-07-13 20:34:51,374 INFO L226 Difference]: Without dead ends: 2035 [2021-07-13 20:34:51,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1253.2ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:34:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-07-13 20:34:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1516. [2021-07-13 20:34:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.3755775577557756) internal successors, (5114), 1515 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5114 transitions. [2021-07-13 20:34:51,403 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5114 transitions. Word has length 26 [2021-07-13 20:34:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:51,403 INFO L482 AbstractCegarLoop]: Abstraction has 1516 states and 5114 transitions. [2021-07-13 20:34:51,403 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) [2021-07-13 20:34:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5114 transitions. [2021-07-13 20:34:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:51,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:51,406 INFO L508 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] [2021-07-13 20:34:51,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1121 [2021-07-13 20:34:51,607 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:51,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:51,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1368330285, now seen corresponding path program 16 times [2021-07-13 20:34:51,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:51,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872725970] [2021-07-13 20:34:51,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:51,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:51,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872725970] [2021-07-13 20:34:51,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872725970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:51,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753354639] [2021-07-13 20:34:51,968 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 [2021-07-13 20:34:51,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:51,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:51,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:34:51,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:52,282 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-07-13 20:34:52,508 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2021-07-13 20:34:52,571 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_38], 2=[A, v_prenex_37]} [2021-07-13 20:34:52,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:34:52,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,686 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-07-13 20:34:52,687 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-07-13 20:34:52,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:52,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:34:52,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:52,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:52,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:52,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:34:52,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:52,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:34:52,742 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:22 [2021-07-13 20:34:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:52,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753354639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:52,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:52,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:34:52,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412367484] [2021-07-13 20:34:52,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:52,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:52,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:52,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:52,780 INFO L87 Difference]: Start difference. First operand 1516 states and 5114 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) [2021-07-13 20:34:53,742 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:34:54,077 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-07-13 20:34:54,244 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-07-13 20:34:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:54,491 INFO L93 Difference]: Finished difference Result 2399 states and 7708 transitions. [2021-07-13 20:34:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:34:54,491 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 [2021-07-13 20:34:54,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:54,495 INFO L225 Difference]: With dead ends: 2399 [2021-07-13 20:34:54,496 INFO L226 Difference]: Without dead ends: 2354 [2021-07-13 20:34:54,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 2013.6ms TimeCoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:34:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2021-07-13 20:34:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 1531. [2021-07-13 20:34:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 3.3816993464052287) internal successors, (5174), 1530 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 5174 transitions. [2021-07-13 20:34:54,525 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 5174 transitions. Word has length 26 [2021-07-13 20:34:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:54,526 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 5174 transitions. [2021-07-13 20:34:54,526 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) [2021-07-13 20:34:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 5174 transitions. [2021-07-13 20:34:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:54,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:54,528 INFO L508 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] [2021-07-13 20:34:54,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1168,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:54,729 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:54,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:54,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1309104231, now seen corresponding path program 17 times [2021-07-13 20:34:54,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:54,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916626866] [2021-07-13 20:34:54,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:55,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:55,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916626866] [2021-07-13 20:34:55,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916626866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:55,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775255838] [2021-07-13 20:34:55,044 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 [2021-07-13 20:34:55,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:34:55,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:55,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:55,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:55,408 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-07-13 20:34:55,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:55,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:34:55,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,946 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2021-07-13 20:34:55,946 INFO L628 ElimStorePlain]: treesize reduction 116, result has 75.0 percent of original size [2021-07-13 20:34:55,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,964 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:55,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-13 20:34:55,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:55,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:55,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:55,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:34:55,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,233 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-07-13 20:34:56,234 INFO L628 ElimStorePlain]: treesize reduction 20, result has 93.6 percent of original size [2021-07-13 20:34:56,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:34:56,252 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,368 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-07-13 20:34:56,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 24 [2021-07-13 20:34:56,388 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 24 [2021-07-13 20:34:56,404 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,615 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2021-07-13 20:34:56,616 INFO L628 ElimStorePlain]: treesize reduction 16, result has 93.2 percent of original size [2021-07-13 20:34:56,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,629 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:56,630 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 21 treesize of output 17 [2021-07-13 20:34:56,631 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,738 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:56,738 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 28 treesize of output 20 [2021-07-13 20:34:56,740 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:34:56,843 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:56,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:56,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:56,939 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:34:56,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:34:56,941 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:57,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:57,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:34:57,023 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:479, output treesize:150 [2021-07-13 20:34:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:57,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775255838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:57,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:57,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:34:57,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926755621] [2021-07-13 20:34:57,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:34:57,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:34:57,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:34:57,152 INFO L87 Difference]: Start difference. First operand 1531 states and 5174 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) [2021-07-13 20:34:58,438 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-07-13 20:34:58,629 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-07-13 20:34:58,952 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-13 20:34:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:59,482 INFO L93 Difference]: Finished difference Result 2633 states and 8507 transitions. [2021-07-13 20:34:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:34:59,482 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 [2021-07-13 20:34:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:59,487 INFO L225 Difference]: With dead ends: 2633 [2021-07-13 20:34:59,487 INFO L226 Difference]: Without dead ends: 2603 [2021-07-13 20:34:59,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 2415.5ms TimeCoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:34:59,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-07-13 20:34:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1532. [2021-07-13 20:34:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.3860222077073807) internal successors, (5184), 1531 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5184 transitions. [2021-07-13 20:34:59,532 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5184 transitions. Word has length 26 [2021-07-13 20:34:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:59,532 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5184 transitions. [2021-07-13 20:34:59,532 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) [2021-07-13 20:34:59,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5184 transitions. [2021-07-13 20:34:59,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:59,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:59,536 INFO L508 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] [2021-07-13 20:34:59,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1180 [2021-07-13 20:34:59,757 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:59,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:59,757 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 18 times [2021-07-13 20:34:59,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:59,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858083540] [2021-07-13 20:34:59,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:00,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:00,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858083540] [2021-07-13 20:35:00,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858083540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:00,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053209022] [2021-07-13 20:35:00,117 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 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 [2021-07-13 20:35:00,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:35:00,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:00,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:35:00,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:00,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:35:00,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16 [2021-07-13 20:35:00,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13 [2021-07-13 20:35:00,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16 [2021-07-13 20:35:00,531 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 13 [2021-07-13 20:35:00,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:00,544 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:00,554 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:00,563 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:00,569 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:00,576 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:35:00,582 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:00,588 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:00,594 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:00,600 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:35:00,604 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,624 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:35:00,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:00,625 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-07-13 20:35:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:00,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053209022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:00,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:00,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:35:00,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455547919] [2021-07-13 20:35:00,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:00,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:00,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:00,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:00,651 INFO L87 Difference]: Start difference. First operand 1532 states and 5184 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) [2021-07-13 20:35:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:01,629 INFO L93 Difference]: Finished difference Result 2023 states and 6645 transitions. [2021-07-13 20:35:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:35:01,629 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 [2021-07-13 20:35:01,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:01,633 INFO L225 Difference]: With dead ends: 2023 [2021-07-13 20:35:01,634 INFO L226 Difference]: Without dead ends: 1998 [2021-07-13 20:35:01,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1158.0ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:35:01,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-07-13 20:35:01,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1567. [2021-07-13 20:35:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1566 states have (on average 3.3812260536398466) internal successors, (5295), 1566 states have internal predecessors, (5295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 5295 transitions. [2021-07-13 20:35:01,657 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 5295 transitions. Word has length 26 [2021-07-13 20:35:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:01,657 INFO L482 AbstractCegarLoop]: Abstraction has 1567 states and 5295 transitions. [2021-07-13 20:35:01,657 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) [2021-07-13 20:35:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 5295 transitions. [2021-07-13 20:35:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:01,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:01,660 INFO L508 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] [2021-07-13 20:35:01,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1208,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:01,860 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:01,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1409101781, now seen corresponding path program 19 times [2021-07-13 20:35:01,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:01,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423077069] [2021-07-13 20:35:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:02,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:02,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423077069] [2021-07-13 20:35:02,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423077069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:02,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057349033] [2021-07-13 20:35:02,176 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 [2021-07-13 20:35:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:02,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:35:02,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:02,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:02,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-13 20:35:02,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,619 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:02,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-13 20:35:02,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,632 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:02,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:35:02,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,643 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:02,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,653 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:02,654 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,666 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:02,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-13 20:35:02,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,677 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:02,678 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:02,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:35:02,693 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,703 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:02,704 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,713 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:02,713 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,725 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:02,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:35:02,727 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,736 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:02,737 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,748 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:35:02,749 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:02,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:35:02,763 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,771 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:02,772 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:02,778 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:02,779 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 28 treesize of output 16 [2021-07-13 20:35:02,779 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:02,878 INFO L628 ElimStorePlain]: treesize reduction 26, result has 82.8 percent of original size [2021-07-13 20:35:02,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:35:02,880 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:91 [2021-07-13 20:35:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:02,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057349033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:02,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:02,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:35:02,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164880033] [2021-07-13 20:35:02,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:35:02,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:02,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:35:02,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:35:02,966 INFO L87 Difference]: Start difference. First operand 1567 states and 5295 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) [2021-07-13 20:35:03,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:03,833 INFO L93 Difference]: Finished difference Result 2240 states and 7336 transitions. [2021-07-13 20:35:03,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:35:03,834 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 [2021-07-13 20:35:03,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:03,838 INFO L225 Difference]: With dead ends: 2240 [2021-07-13 20:35:03,838 INFO L226 Difference]: Without dead ends: 2215 [2021-07-13 20:35:03,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1101.8ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:35:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-07-13 20:35:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 1570. [2021-07-13 20:35:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.3817718291905674) internal successors, (5306), 1569 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5306 transitions. [2021-07-13 20:35:03,865 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5306 transitions. Word has length 26 [2021-07-13 20:35:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:03,865 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5306 transitions. [2021-07-13 20:35:03,865 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) [2021-07-13 20:35:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5306 transitions. [2021-07-13 20:35:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:03,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:03,868 INFO L508 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] [2021-07-13 20:35:04,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1250,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:04,069 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 20 times [2021-07-13 20:35:04,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:04,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543500803] [2021-07-13 20:35:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:04,340 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-07-13 20:35:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:04,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:04,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543500803] [2021-07-13 20:35:04,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543500803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:04,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537580032] [2021-07-13 20:35:04,424 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 [2021-07-13 20:35:04,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:04,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:04,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:35:04,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:04,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:04,879 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:35:04,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:35:04,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:04,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:04,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:04,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:35:04,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,032 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:35:05,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:05,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,056 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:05,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:35:05,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,078 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:05,078 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:35:05,081 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,212 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-07-13 20:35:05,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:05,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,247 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:05,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 [2021-07-13 20:35:05,248 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,268 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:05,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-07-13 20:35:05,271 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,388 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-07-13 20:35:05,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:05,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:05,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 [2021-07-13 20:35:05,411 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:05,428 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:35:05,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:35:05,430 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,531 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-13 20:35:05,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:05,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:05,548 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:329, output treesize:220 [2021-07-13 20:35:05,687 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-07-13 20:35:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:05,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537580032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:05,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:05,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:35:05,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275976473] [2021-07-13 20:35:05,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:05,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:05,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:05,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:05,754 INFO L87 Difference]: Start difference. First operand 1570 states and 5306 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) [2021-07-13 20:35:06,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:06,730 INFO L93 Difference]: Finished difference Result 1853 states and 6135 transitions. [2021-07-13 20:35:06,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:35:06,730 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 [2021-07-13 20:35:06,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:06,734 INFO L225 Difference]: With dead ends: 1853 [2021-07-13 20:35:06,734 INFO L226 Difference]: Without dead ends: 1828 [2021-07-13 20:35:06,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1274.4ms TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:35:06,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-07-13 20:35:06,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1583. [2021-07-13 20:35:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.3874841972187104) internal successors, (5359), 1582 states have internal predecessors, (5359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5359 transitions. [2021-07-13 20:35:06,766 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5359 transitions. Word has length 26 [2021-07-13 20:35:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:06,766 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 5359 transitions. [2021-07-13 20:35:06,766 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) [2021-07-13 20:35:06,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5359 transitions. [2021-07-13 20:35:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:06,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:06,770 INFO L508 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] [2021-07-13 20:35:06,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1301,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:06,973 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:06,973 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 21 times [2021-07-13 20:35:06,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:06,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261223830] [2021-07-13 20:35:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:07,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:07,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261223830] [2021-07-13 20:35:07,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261223830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:07,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240018338] [2021-07-13 20:35:07,307 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 [2021-07-13 20:35:07,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:35:07,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:07,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:07,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:07,692 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-13 20:35:07,947 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_67, v_prenex_66], 3=[v_prenex_68]} [2021-07-13 20:35:07,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:07,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:35:07,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,094 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-07-13 20:35:08,094 INFO L628 ElimStorePlain]: treesize reduction 123, result has 44.1 percent of original size [2021-07-13 20:35:08,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:08,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:08,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:35:08,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:08,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:08,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:08,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:35:08,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:08,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:08,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:35:08,195 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:08,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:08,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:08,219 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:234, output treesize:20 [2021-07-13 20:35:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:08,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240018338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:08,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:08,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:35:08,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843430279] [2021-07-13 20:35:08,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:35:08,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:08,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:35:08,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:35:08,249 INFO L87 Difference]: Start difference. First operand 1583 states and 5359 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) [2021-07-13 20:35:08,976 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-13 20:35:09,199 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2021-07-13 20:35:09,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:09,403 INFO L93 Difference]: Finished difference Result 2166 states and 7091 transitions. [2021-07-13 20:35:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:35:09,403 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 [2021-07-13 20:35:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:09,407 INFO L225 Difference]: With dead ends: 2166 [2021-07-13 20:35:09,407 INFO L226 Difference]: Without dead ends: 2121 [2021-07-13 20:35:09,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1467.0ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:35:09,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-07-13 20:35:09,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1613. [2021-07-13 20:35:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 3.3957816377171217) internal successors, (5474), 1612 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 5474 transitions. [2021-07-13 20:35:09,433 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 5474 transitions. Word has length 26 [2021-07-13 20:35:09,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:09,433 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 5474 transitions. [2021-07-13 20:35:09,433 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) [2021-07-13 20:35:09,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 5474 transitions. [2021-07-13 20:35:09,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:09,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:09,436 INFO L508 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] [2021-07-13 20:35:09,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:09,637 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:09,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:09,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1194379997, now seen corresponding path program 22 times [2021-07-13 20:35:09,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:09,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202642160] [2021-07-13 20:35:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:10,083 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-07-13 20:35:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:10,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:10,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202642160] [2021-07-13 20:35:10,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202642160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:10,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084912082] [2021-07-13 20:35:10,157 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 [2021-07-13 20:35:10,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:10,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:10,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:10,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:10,542 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-07-13 20:35:10,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:10,640 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:10,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:35:10,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:10,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:10,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:10,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:35:10,656 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:10,970 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 124 [2021-07-13 20:35:10,971 INFO L628 ElimStorePlain]: treesize reduction 69, result has 84.4 percent of original size [2021-07-13 20:35:10,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:10,984 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:10,985 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 21 treesize of output 17 [2021-07-13 20:35:10,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,139 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:35:11,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 24 [2021-07-13 20:35:11,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 24 [2021-07-13 20:35:11,175 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,426 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2021-07-13 20:35:11,426 INFO L628 ElimStorePlain]: treesize reduction 18, result has 94.4 percent of original size [2021-07-13 20:35:11,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,439 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:11,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:35:11,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,553 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-13 20:35:11,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:35:11,568 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,675 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-07-13 20:35:11,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,687 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:11,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:35:11,688 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,793 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-13 20:35:11,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:35:11,808 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-13 20:35:11,921 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,930 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:35:11,930 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 30 treesize of output 1 [2021-07-13 20:35:11,930 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:12,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:12,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:12,011 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:150 [2021-07-13 20:35:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:12,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084912082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:12,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:12,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:35:12,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113931090] [2021-07-13 20:35:12,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:35:12,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:12,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:35:12,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:35:12,137 INFO L87 Difference]: Start difference. First operand 1613 states and 5474 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) [2021-07-13 20:35:13,068 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:35:13,225 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-13 20:35:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:13,432 INFO L93 Difference]: Finished difference Result 2386 states and 7813 transitions. [2021-07-13 20:35:13,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:35:13,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:13,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:13,437 INFO L225 Difference]: With dead ends: 2386 [2021-07-13 20:35:13,437 INFO L226 Difference]: Without dead ends: 2352 [2021-07-13 20:35:13,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1735.6ms TimeCoverageRelationStatistics Valid=239, Invalid=883, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:35:13,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-07-13 20:35:13,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 1599. [2021-07-13 20:35:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.392991239048811) internal successors, (5422), 1598 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:13,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5422 transitions. [2021-07-13 20:35:13,462 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5422 transitions. Word has length 26 [2021-07-13 20:35:13,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:13,462 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5422 transitions. [2021-07-13 20:35:13,462 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) [2021-07-13 20:35:13,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5422 transitions. [2021-07-13 20:35:13,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:13,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:13,464 INFO L508 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] [2021-07-13 20:35:13,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1375 [2021-07-13 20:35:13,665 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:13,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:13,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 23 times [2021-07-13 20:35:13,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:13,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267375548] [2021-07-13 20:35:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:13,870 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-07-13 20:35:13,994 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2021-07-13 20:35:14,125 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-07-13 20:35:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:14,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:14,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267375548] [2021-07-13 20:35:14,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267375548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:14,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336581244] [2021-07-13 20:35:14,189 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 [2021-07-13 20:35:14,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:35:14,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:14,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:35:14,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:14,700 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-07-13 20:35:14,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:14,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:14,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:35:14,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:14,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:14,880 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:14,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:35:14,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:15,237 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-07-13 20:35:15,238 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.2 percent of original size [2021-07-13 20:35:15,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:15,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:15,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:35:15,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:15,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:15,268 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:15,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:35:15,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:15,420 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-13 20:35:15,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:15,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:15,434 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:15,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:35:15,435 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:15,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:15,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:15,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:35:15,450 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:15,584 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:35:15,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:15,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:15,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:15,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 24 [2021-07-13 20:35:15,601 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:15,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:15,612 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:15,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-13 20:35:15,613 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:15,731 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-07-13 20:35:15,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:15,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:15,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:15,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:35:15,749 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:15,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:15,759 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:35:15,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:35:15,761 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:15,862 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-07-13 20:35:15,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:15,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-13 20:35:15,869 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:391, output treesize:170 [2021-07-13 20:35:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:16,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336581244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:16,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:16,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:35:16,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215822433] [2021-07-13 20:35:16,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:35:16,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:16,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:35:16,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:35:16,040 INFO L87 Difference]: Start difference. First operand 1599 states and 5422 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) [2021-07-13 20:35:17,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:17,079 INFO L93 Difference]: Finished difference Result 2115 states and 7008 transitions. [2021-07-13 20:35:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:35:17,079 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 [2021-07-13 20:35:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:17,082 INFO L225 Difference]: With dead ends: 2115 [2021-07-13 20:35:17,082 INFO L226 Difference]: Without dead ends: 2090 [2021-07-13 20:35:17,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1610.5ms TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:35:17,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-07-13 20:35:17,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1599. [2021-07-13 20:35:17,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.392991239048811) internal successors, (5422), 1598 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5422 transitions. [2021-07-13 20:35:17,104 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5422 transitions. Word has length 26 [2021-07-13 20:35:17,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:17,104 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5422 transitions. [2021-07-13 20:35:17,104 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) [2021-07-13 20:35:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5422 transitions. [2021-07-13 20:35:17,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:17,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:17,106 INFO L508 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] [2021-07-13 20:35:17,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1404,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:17,307 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:17,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:17,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1510554133, now seen corresponding path program 42 times [2021-07-13 20:35:17,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:17,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147024476] [2021-07-13 20:35:17,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:17,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:17,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147024476] [2021-07-13 20:35:17,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147024476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:17,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873758330] [2021-07-13 20:35:17,543 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 [2021-07-13 20:35:17,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:35:17,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:17,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:35:17,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:18,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,068 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 35 treesize of output 19 [2021-07-13 20:35:18,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:35:18,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:35:18,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:35:18,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:18,098 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:35:18,106 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:35:18,114 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:35:18,122 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:35:18,129 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:35:18,136 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,143 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:35:18,144 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:35:18,152 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:35:18,159 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,166 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 30 treesize of output 16 [2021-07-13 20:35:18,166 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:18,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:18,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:35:18,170 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:18,190 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-07-13 20:35:18,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:18,192 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-13 20:35:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:18,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873758330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:18,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:18,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:35:18,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224912943] [2021-07-13 20:35:18,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:18,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:18,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:18,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:18,216 INFO L87 Difference]: Start difference. First operand 1599 states and 5422 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) [2021-07-13 20:35:19,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:19,601 INFO L93 Difference]: Finished difference Result 2060 states and 6796 transitions. [2021-07-13 20:35:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:35:19,602 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 [2021-07-13 20:35:19,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:19,605 INFO L225 Difference]: With dead ends: 2060 [2021-07-13 20:35:19,606 INFO L226 Difference]: Without dead ends: 2034 [2021-07-13 20:35:19,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1429.7ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:35:19,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-07-13 20:35:19,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1603. [2021-07-13 20:35:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.3907615480649187) internal successors, (5432), 1602 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5432 transitions. [2021-07-13 20:35:19,629 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5432 transitions. Word has length 26 [2021-07-13 20:35:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:19,629 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 5432 transitions. [2021-07-13 20:35:19,629 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) [2021-07-13 20:35:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5432 transitions. [2021-07-13 20:35:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:19,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:19,632 INFO L508 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] [2021-07-13 20:35:19,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1441 [2021-07-13 20:35:19,832 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:19,833 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-07-13 20:35:19,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:19,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974607997] [2021-07-13 20:35:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:20,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:20,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974607997] [2021-07-13 20:35:20,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974607997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:20,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986257454] [2021-07-13 20:35:20,218 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 [2021-07-13 20:35:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:20,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:35:20,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:20,577 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-07-13 20:35:20,633 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_92, v_prenex_96], 5=[v_prenex_94, A]} [2021-07-13 20:35:20,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:20,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:20,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:20,641 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 27 treesize of output 13 [2021-07-13 20:35:20,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:20,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:20,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-07-13 20:35:20,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:20,740 INFO L628 ElimStorePlain]: treesize reduction 133, result has 45.9 percent of original size [2021-07-13 20:35:20,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:20,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:20,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:20,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:35:20,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:20,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:20,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:20,779 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:35:20,780 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:20,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:20,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:20,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:35:20,809 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:20,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:20,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:35:20,834 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:303, output treesize:29 [2021-07-13 20:35:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:20,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986257454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:20,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:20,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:35:20,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46578691] [2021-07-13 20:35:20,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:35:20,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:20,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:35:20,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:35:20,876 INFO L87 Difference]: Start difference. First operand 1603 states and 5432 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) [2021-07-13 20:35:22,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:22,385 INFO L93 Difference]: Finished difference Result 2261 states and 7446 transitions. [2021-07-13 20:35:22,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:35:22,385 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 [2021-07-13 20:35:22,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:22,389 INFO L225 Difference]: With dead ends: 2261 [2021-07-13 20:35:22,390 INFO L226 Difference]: Without dead ends: 2246 [2021-07-13 20:35:22,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1636.1ms TimeCoverageRelationStatistics Valid=355, Invalid=1451, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:35:22,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-07-13 20:35:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1603. [2021-07-13 20:35:22,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.3907615480649187) internal successors, (5432), 1602 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:22,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5432 transitions. [2021-07-13 20:35:22,418 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5432 transitions. Word has length 26 [2021-07-13 20:35:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:22,418 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 5432 transitions. [2021-07-13 20:35:22,418 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) [2021-07-13 20:35:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5432 transitions. [2021-07-13 20:35:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:22,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:22,421 INFO L508 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] [2021-07-13 20:35:22,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1531 [2021-07-13 20:35:22,622 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:22,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:22,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 24 times [2021-07-13 20:35:22,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:22,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959570350] [2021-07-13 20:35:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:22,937 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-07-13 20:35:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:23,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:23,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959570350] [2021-07-13 20:35:23,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959570350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:23,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663015389] [2021-07-13 20:35:23,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:23,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:35:23,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:23,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:23,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:23,478 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-07-13 20:35:23,988 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:23,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:35:23,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:24,384 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 124 [2021-07-13 20:35:24,384 INFO L628 ElimStorePlain]: treesize reduction 126, result has 75.9 percent of original size [2021-07-13 20:35:24,407 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:24,407 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 21 treesize of output 25 [2021-07-13 20:35:24,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:24,565 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:35:24,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:24,585 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:35:24,585 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:35:24,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:24,742 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-13 20:35:24,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:24,763 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:35:24,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:35:24,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:24,917 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:35:24,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:24,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:24,933 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 16 treesize of output 26 [2021-07-13 20:35:24,938 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:25,082 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-13 20:35:25,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:25,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:25,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-13 20:35:25,105 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:25,116 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:35:25,116 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 30 treesize of output 16 [2021-07-13 20:35:25,117 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:25,370 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2021-07-13 20:35:25,370 INFO L628 ElimStorePlain]: treesize reduction 21, result has 93.4 percent of original size [2021-07-13 20:35:25,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:25,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 [2021-07-13 20:35:25,393 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:25,404 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:35:25,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-07-13 20:35:25,404 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:25,512 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-13 20:35:25,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:25,533 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:25,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:35:25,535 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:25,639 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-13 20:35:25,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:25,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:25,653 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:539, output treesize:402 [2021-07-13 20:35:25,870 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-07-13 20:35:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:25,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663015389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:25,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:25,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:35:25,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040916635] [2021-07-13 20:35:25,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:35:25,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:25,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:35:25,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:35:25,981 INFO L87 Difference]: Start difference. First operand 1603 states and 5432 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) [2021-07-13 20:35:26,754 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2021-07-13 20:35:26,887 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2021-07-13 20:35:27,359 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-07-13 20:35:27,523 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-07-13 20:35:27,765 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-07-13 20:35:28,031 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-07-13 20:35:28,207 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-07-13 20:35:28,540 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2021-07-13 20:35:28,881 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-07-13 20:35:29,274 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-07-13 20:35:29,685 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 88 [2021-07-13 20:35:30,256 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2021-07-13 20:35:30,498 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-07-13 20:35:31,110 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2021-07-13 20:35:31,500 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 28 [2021-07-13 20:35:31,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:31,731 INFO L93 Difference]: Finished difference Result 2594 states and 8222 transitions. [2021-07-13 20:35:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:35:31,732 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 [2021-07-13 20:35:31,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:31,736 INFO L225 Difference]: With dead ends: 2594 [2021-07-13 20:35:31,736 INFO L226 Difference]: Without dead ends: 2530 [2021-07-13 20:35:31,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 6007.5ms TimeCoverageRelationStatistics Valid=469, Invalid=2183, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:35:31,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-07-13 20:35:31,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 1635. [2021-07-13 20:35:31,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 3.401468788249694) internal successors, (5558), 1634 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 5558 transitions. [2021-07-13 20:35:31,769 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 5558 transitions. Word has length 26 [2021-07-13 20:35:31,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:31,769 INFO L482 AbstractCegarLoop]: Abstraction has 1635 states and 5558 transitions. [2021-07-13 20:35:31,769 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) [2021-07-13 20:35:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 5558 transitions. [2021-07-13 20:35:31,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:31,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:31,772 INFO L508 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] [2021-07-13 20:35:31,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1545,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:31,987 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:31,988 INFO L82 PathProgramCache]: Analyzing trace with hash 519326571, now seen corresponding path program 44 times [2021-07-13 20:35:31,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:31,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685919160] [2021-07-13 20:35:31,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:32,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:32,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685919160] [2021-07-13 20:35:32,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685919160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:32,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919754382] [2021-07-13 20:35:32,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:32,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:32,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:32,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:35:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:32,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:32,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:32,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:32,927 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 41 treesize of output 45 [2021-07-13 20:35:32,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:32,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:32,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:32,969 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 20:35:32,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-13 20:35:32,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:32,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:32,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:32,996 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:32,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:35:32,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,020 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:33,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:35:33,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,053 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-07-13 20:35:33,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 26 [2021-07-13 20:35:33,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:33,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-07-13 20:35:33,084 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,108 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-07-13 20:35:33,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-07-13 20:35:33,110 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,136 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-13 20:35:33,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:35:33,140 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,157 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:33,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-07-13 20:35:33,158 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,173 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:33,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:35:33,174 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,190 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:33,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:35:33,191 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,207 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:33,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:35:33,208 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,223 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:33,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 20:35:33,224 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,241 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:33,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-07-13 20:35:33,242 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,257 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:33,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-07-13 20:35:33,258 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:33,267 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:35:33,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-13 20:35:33,268 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:33,347 INFO L628 ElimStorePlain]: treesize reduction 56, result has 61.4 percent of original size [2021-07-13 20:35:33,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:35:33,350 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:745, output treesize:71 [2021-07-13 20:35:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:33,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919754382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:33,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:33,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-13 20:35:33,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024592299] [2021-07-13 20:35:33,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:35:33,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:33,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:35:33,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:35:33,432 INFO L87 Difference]: Start difference. First operand 1635 states and 5558 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:35,883 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-07-13 20:35:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:36,557 INFO L93 Difference]: Finished difference Result 2662 states and 8486 transitions. [2021-07-13 20:35:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:35:36,557 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:36,562 INFO L225 Difference]: With dead ends: 2662 [2021-07-13 20:35:36,562 INFO L226 Difference]: Without dead ends: 2618 [2021-07-13 20:35:36,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 3064.8ms TimeCoverageRelationStatistics Valid=692, Invalid=3598, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:35:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2021-07-13 20:35:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 1642. [2021-07-13 20:35:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 3.4021937842778796) internal successors, (5583), 1641 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:36,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 5583 transitions. [2021-07-13 20:35:36,590 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 5583 transitions. Word has length 26 [2021-07-13 20:35:36,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:36,590 INFO L482 AbstractCegarLoop]: Abstraction has 1642 states and 5583 transitions. [2021-07-13 20:35:36,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:36,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 5583 transitions. [2021-07-13 20:35:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:36,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:36,592 INFO L508 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] [2021-07-13 20:35:36,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1623 [2021-07-13 20:35:36,793 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:36,793 INFO L82 PathProgramCache]: Analyzing trace with hash -456992273, now seen corresponding path program 45 times [2021-07-13 20:35:36,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:36,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049212252] [2021-07-13 20:35:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:37,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:37,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049212252] [2021-07-13 20:35:37,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049212252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:37,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599459571] [2021-07-13 20:35:37,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:37,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:35:37,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:37,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:35:37,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:37,713 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:35:37,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-07-13 20:35:37,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:37,758 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-07-13 20:35:37,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 34 [2021-07-13 20:35:37,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:37,791 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-07-13 20:35:37,792 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 30 [2021-07-13 20:35:37,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:37,825 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-07-13 20:35:37,826 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 30 [2021-07-13 20:35:37,827 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:37,860 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-07-13 20:35:37,860 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 30 [2021-07-13 20:35:37,862 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:37,880 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:35:37,880 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-07-13 20:35:37,881 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:37,920 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:35:37,921 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-07-13 20:35:37,927 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:37,966 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:35:37,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-07-13 20:35:37,973 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,015 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-13 20:35:38,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 45 [2021-07-13 20:35:38,028 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,045 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:35:38,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 20:35:38,046 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,063 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:35:38,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-07-13 20:35:38,063 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,080 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:35:38,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 20:35:38,081 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,118 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:35:38,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-07-13 20:35:38,123 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,158 INFO L354 Elim1Store]: treesize reduction 26, result has 36.6 percent of original size [2021-07-13 20:35:38,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 33 [2021-07-13 20:35:38,159 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,176 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:35:38,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:35:38,176 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,206 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-13 20:35:38,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-07-13 20:35:38,215 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:38,510 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-07-13 20:35:38,510 INFO L628 ElimStorePlain]: treesize reduction 92, result has 77.5 percent of original size [2021-07-13 20:35:38,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-13 20:35:38,516 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:833, output treesize:358 [2021-07-13 20:35:38,753 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-07-13 20:35:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:38,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599459571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:38,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:38,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:35:38,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526135794] [2021-07-13 20:35:38,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:35:38,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:38,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:35:38,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:35:38,868 INFO L87 Difference]: Start difference. First operand 1642 states and 5583 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) [2021-07-13 20:35:41,497 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-07-13 20:35:41,647 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-07-13 20:35:41,951 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-07-13 20:35:42,125 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-07-13 20:35:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:42,329 INFO L93 Difference]: Finished difference Result 3238 states and 10236 transitions. [2021-07-13 20:35:42,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:35:42,329 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 [2021-07-13 20:35:42,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:42,335 INFO L225 Difference]: With dead ends: 3238 [2021-07-13 20:35:42,335 INFO L226 Difference]: Without dead ends: 3208 [2021-07-13 20:35:42,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 3330.5ms TimeCoverageRelationStatistics Valid=689, Invalid=3733, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:35:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2021-07-13 20:35:42,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 1691. [2021-07-13 20:35:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.4005917159763315) internal successors, (5747), 1690 states have internal predecessors, (5747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 5747 transitions. [2021-07-13 20:35:42,366 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 5747 transitions. Word has length 26 [2021-07-13 20:35:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:42,366 INFO L482 AbstractCegarLoop]: Abstraction has 1691 states and 5747 transitions. [2021-07-13 20:35:42,366 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) [2021-07-13 20:35:42,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 5747 transitions. [2021-07-13 20:35:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:42,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:42,369 INFO L508 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] [2021-07-13 20:35:42,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1727,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:42,569 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:42,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1125767463, now seen corresponding path program 25 times [2021-07-13 20:35:42,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:42,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122520964] [2021-07-13 20:35:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:42,871 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-07-13 20:35:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:42,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:42,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122520964] [2021-07-13 20:35:42,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122520964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:42,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948158825] [2021-07-13 20:35:42,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:42,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:43,272 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-07-13 20:35:43,480 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_134, v_prenex_135]} [2021-07-13 20:35:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:43,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:35:43,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:43,589 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-07-13 20:35:43,590 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-07-13 20:35:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:43,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:43,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:35:43,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:43,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:43,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:43,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:43,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:35:43,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:43,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:43,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:35:43,644 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:22 [2021-07-13 20:35:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:43,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948158825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:43,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:43,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:35:43,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168388225] [2021-07-13 20:35:43,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:35:43,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:43,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:35:43,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:35:43,681 INFO L87 Difference]: Start difference. First operand 1691 states and 5747 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) [2021-07-13 20:35:44,664 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-13 20:35:44,800 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-07-13 20:35:45,006 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-07-13 20:35:45,230 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-07-13 20:35:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:45,456 INFO L93 Difference]: Finished difference Result 2561 states and 8224 transitions. [2021-07-13 20:35:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:35:45,456 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 [2021-07-13 20:35:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:45,461 INFO L225 Difference]: With dead ends: 2561 [2021-07-13 20:35:45,461 INFO L226 Difference]: Without dead ends: 2516 [2021-07-13 20:35:45,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1954.5ms TimeCoverageRelationStatistics Valid=273, Invalid=987, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:35:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2021-07-13 20:35:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 1720. [2021-07-13 20:35:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 3.414194299011053) internal successors, (5869), 1719 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:45,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 5869 transitions. [2021-07-13 20:35:45,488 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 5869 transitions. Word has length 26 [2021-07-13 20:35:45,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:45,488 INFO L482 AbstractCegarLoop]: Abstraction has 1720 states and 5869 transitions. [2021-07-13 20:35:45,488 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) [2021-07-13 20:35:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 5869 transitions. [2021-07-13 20:35:45,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:45,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:45,490 INFO L508 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] [2021-07-13 20:35:45,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1860 [2021-07-13 20:35:45,691 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:45,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:45,691 INFO L82 PathProgramCache]: Analyzing trace with hash -491765317, now seen corresponding path program 26 times [2021-07-13 20:35:45,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:45,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438906667] [2021-07-13 20:35:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:46,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:46,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438906667] [2021-07-13 20:35:46,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438906667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:46,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936248582] [2021-07-13 20:35:46,005 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 [2021-07-13 20:35:46,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:46,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:46,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:35:46,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:46,417 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:35:46,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:46,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:35:46,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:46,965 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 122 [2021-07-13 20:35:46,965 INFO L628 ElimStorePlain]: treesize reduction 130, result has 76.3 percent of original size [2021-07-13 20:35:46,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:46,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 32 [2021-07-13 20:35:46,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,001 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:35:47,001 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:35:47,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,289 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 119 [2021-07-13 20:35:47,289 INFO L628 ElimStorePlain]: treesize reduction 23, result has 94.1 percent of original size [2021-07-13 20:35:47,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:47,311 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-13 20:35:47,314 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,325 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:35:47,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-07-13 20:35:47,326 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,449 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-07-13 20:35:47,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:47,472 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:47,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:35:47,476 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,606 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-13 20:35:47,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:47,625 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:35:47,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:35:47,627 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,738 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:35:47,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:47,759 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:47,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:35:47,760 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:47,874 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:35:47,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:47,892 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:35:47,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:35:47,893 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:48,003 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-07-13 20:35:48,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:48,021 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:35:48,022 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:35:48,026 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:48,131 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-13 20:35:48,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:48,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:35:48,145 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:350 [2021-07-13 20:35:48,284 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-13 20:35:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:48,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936248582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:48,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:48,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:35:48,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946332154] [2021-07-13 20:35:48,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:35:48,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:48,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:35:48,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:35:48,445 INFO L87 Difference]: Start difference. First operand 1720 states and 5869 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) [2021-07-13 20:35:49,274 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 43 [2021-07-13 20:35:49,658 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-07-13 20:35:49,791 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-07-13 20:35:50,284 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-07-13 20:35:50,475 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-07-13 20:35:50,842 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-07-13 20:35:51,220 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-07-13 20:35:51,422 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-13 20:35:51,839 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-07-13 20:35:52,414 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 89 [2021-07-13 20:35:52,889 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 96 [2021-07-13 20:35:53,412 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 80 [2021-07-13 20:35:54,018 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2021-07-13 20:35:54,696 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 101 [2021-07-13 20:35:55,268 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 88 [2021-07-13 20:35:56,055 WARN L205 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 100 [2021-07-13 20:35:56,221 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2021-07-13 20:35:56,807 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2021-07-13 20:35:57,468 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 95 [2021-07-13 20:35:57,852 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-07-13 20:35:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:57,935 INFO L93 Difference]: Finished difference Result 3224 states and 10085 transitions. [2021-07-13 20:35:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:35:57,936 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 [2021-07-13 20:35:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:57,942 INFO L225 Difference]: With dead ends: 3224 [2021-07-13 20:35:57,942 INFO L226 Difference]: Without dead ends: 3167 [2021-07-13 20:35:57,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 9528.1ms TimeCoverageRelationStatistics Valid=578, Invalid=2614, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:35:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2021-07-13 20:35:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 1704. [2021-07-13 20:35:57,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 3.405754550792719) internal successors, (5800), 1703 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 5800 transitions. [2021-07-13 20:35:57,975 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 5800 transitions. Word has length 26 [2021-07-13 20:35:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:57,975 INFO L482 AbstractCegarLoop]: Abstraction has 1704 states and 5800 transitions. [2021-07-13 20:35:57,975 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) [2021-07-13 20:35:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 5800 transitions. [2021-07-13 20:35:57,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:57,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:57,978 INFO L508 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] [2021-07-13 20:35:58,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1872 [2021-07-13 20:35:58,181 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 46 times [2021-07-13 20:35:58,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:58,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432327365] [2021-07-13 20:35:58,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:58,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:58,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432327365] [2021-07-13 20:35:58,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432327365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:58,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608489968] [2021-07-13 20:35:58,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:58,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:58,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:58,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:35:58,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:58,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,965 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:58,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:58,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,973 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:35:58,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:58,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:35:58,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:58,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:35:58,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:58,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:35:59,001 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:35:59,011 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:35:59,019 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,027 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 30 treesize of output 16 [2021-07-13 20:35:59,028 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:35:59,036 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:35:59,045 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:35:59,053 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:35:59,061 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:35:59,069 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:35:59,076 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:59,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:59,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:35:59,082 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:59,103 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:35:59,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:59,105 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-13 20:35:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:59,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608489968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:59,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:59,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:35:59,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631085049] [2021-07-13 20:35:59,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:35:59,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:59,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:35:59,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:35:59,134 INFO L87 Difference]: Start difference. First operand 1704 states and 5800 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:00,874 INFO L93 Difference]: Finished difference Result 3325 states and 10680 transitions. [2021-07-13 20:36:00,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:36:00,874 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:00,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:00,880 INFO L225 Difference]: With dead ends: 3325 [2021-07-13 20:36:00,880 INFO L226 Difference]: Without dead ends: 3289 [2021-07-13 20:36:00,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1677.6ms TimeCoverageRelationStatistics Valid=497, Invalid=2259, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:36:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2021-07-13 20:36:00,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 1811. [2021-07-13 20:36:00,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.422099447513812) internal successors, (6194), 1810 states have internal predecessors, (6194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6194 transitions. [2021-07-13 20:36:00,914 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6194 transitions. Word has length 26 [2021-07-13 20:36:00,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:00,914 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6194 transitions. [2021-07-13 20:36:00,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:00,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6194 transitions. [2021-07-13 20:36:00,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:00,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:00,917 INFO L508 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] [2021-07-13 20:36:01,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1908 [2021-07-13 20:36:01,140 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:01,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 47 times [2021-07-13 20:36:01,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:01,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780519140] [2021-07-13 20:36:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:01,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:01,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780519140] [2021-07-13 20:36:01,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780519140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:01,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761618814] [2021-07-13 20:36:01,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:01,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:36:01,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:01,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:01,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:01,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:01,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:01,868 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:36:01,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:36:01,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:01,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:01,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:01,888 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:36:01,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:36:01,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:01,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:01,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:01,904 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:36:01,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:36:01,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:01,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:01,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:01,920 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:36:01,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:36:01,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:01,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:01,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:01,944 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:36:01,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 25 [2021-07-13 20:36:01,945 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:01,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:01,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:01,979 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:36:01,980 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 30 treesize of output 32 [2021-07-13 20:36:01,984 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:01,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:01,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,000 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:36:02,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-07-13 20:36:02,001 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:02,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 20:36:02,031 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,059 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:36:02,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:36:02,060 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,090 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:36:02,090 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 34 treesize of output 28 [2021-07-13 20:36:02,092 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,113 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:36:02,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 20:36:02,114 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,134 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:36:02,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-07-13 20:36:02,135 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,154 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:36:02,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:36:02,155 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,174 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:36:02,175 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 30 treesize of output 1 [2021-07-13 20:36:02,175 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,205 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-07-13 20:36:02,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-07-13 20:36:02,207 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:02,217 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:36:02,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:36:02,218 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:02,302 INFO L628 ElimStorePlain]: treesize reduction 24, result has 79.5 percent of original size [2021-07-13 20:36:02,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:36:02,304 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-07-13 20:36:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:02,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761618814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:02,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:02,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-13 20:36:02,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472442648] [2021-07-13 20:36:02,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:36:02,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:02,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:36:02,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:36:02,385 INFO L87 Difference]: Start difference. First operand 1811 states and 6194 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:04,501 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-07-13 20:36:04,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:04,847 INFO L93 Difference]: Finished difference Result 3806 states and 12114 transitions. [2021-07-13 20:36:04,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:36:04,847 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:04,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:04,854 INFO L225 Difference]: With dead ends: 3806 [2021-07-13 20:36:04,854 INFO L226 Difference]: Without dead ends: 3749 [2021-07-13 20:36:04,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2292.6ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:36:04,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2021-07-13 20:36:04,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 1846. [2021-07-13 20:36:04,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 3.430894308943089) internal successors, (6330), 1845 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 6330 transitions. [2021-07-13 20:36:04,891 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 6330 transitions. Word has length 26 [2021-07-13 20:36:04,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:04,891 INFO L482 AbstractCegarLoop]: Abstraction has 1846 states and 6330 transitions. [2021-07-13 20:36:04,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 6330 transitions. [2021-07-13 20:36:04,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:04,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:04,894 INFO L508 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] [2021-07-13 20:36:05,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1998,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:05,094 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:05,094 INFO L82 PathProgramCache]: Analyzing trace with hash 701456227, now seen corresponding path program 27 times [2021-07-13 20:36:05,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:05,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569908859] [2021-07-13 20:36:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:05,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:05,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569908859] [2021-07-13 20:36:05,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569908859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:05,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965106301] [2021-07-13 20:36:05,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:05,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:36:05,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:05,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:36:05,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:05,974 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:36:06,182 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-13 20:36:06,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:06,388 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:36:06,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,403 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:06,403 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:36:06,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,737 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 126 [2021-07-13 20:36:06,737 INFO L628 ElimStorePlain]: treesize reduction 120, result has 76.0 percent of original size [2021-07-13 20:36:06,761 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:06,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:36:06,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:06,916 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-13 20:36:06,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:06,939 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:06,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-13 20:36:06,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:07,090 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-13 20:36:07,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:07,110 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:36:07,110 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:07,111 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:07,251 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:36:07,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:07,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:07,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 32 [2021-07-13 20:36:07,274 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:07,285 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:36:07,285 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 30 treesize of output 16 [2021-07-13 20:36:07,286 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:07,531 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 106 [2021-07-13 20:36:07,531 INFO L628 ElimStorePlain]: treesize reduction 23, result has 92.7 percent of original size [2021-07-13 20:36:07,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:07,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:36:07,553 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:07,667 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:36:07,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:07,688 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:36:07,689 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:36:07,690 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:07,814 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-13 20:36:07,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:07,832 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:36:07,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:36:07,835 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:07,941 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-13 20:36:07,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:07,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:07,954 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:347 [2021-07-13 20:36:08,124 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-07-13 20:36:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:08,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965106301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:08,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:08,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:36:08,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250825853] [2021-07-13 20:36:08,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:36:08,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:08,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:36:08,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:36:08,173 INFO L87 Difference]: Start difference. First operand 1846 states and 6330 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) [2021-07-13 20:36:09,372 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-07-13 20:36:09,587 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-13 20:36:09,803 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-07-13 20:36:10,055 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-13 20:36:10,608 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 121 [2021-07-13 20:36:11,024 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2021-07-13 20:36:11,601 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2021-07-13 20:36:12,295 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 139 [2021-07-13 20:36:12,873 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 116 [2021-07-13 20:36:13,128 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 79 [2021-07-13 20:36:14,061 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 133 [2021-07-13 20:36:14,498 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 81 [2021-07-13 20:36:14,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:14,748 INFO L93 Difference]: Finished difference Result 2649 states and 8646 transitions. [2021-07-13 20:36:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:36:14,748 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 [2021-07-13 20:36:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:14,753 INFO L225 Difference]: With dead ends: 2649 [2021-07-13 20:36:14,753 INFO L226 Difference]: Without dead ends: 2604 [2021-07-13 20:36:14,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 6668.8ms TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:36:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-07-13 20:36:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 1868. [2021-07-13 20:36:14,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.430637386181039) internal successors, (6405), 1867 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6405 transitions. [2021-07-13 20:36:14,779 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6405 transitions. Word has length 26 [2021-07-13 20:36:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:14,779 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 6405 transitions. [2021-07-13 20:36:14,780 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) [2021-07-13 20:36:14,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6405 transitions. [2021-07-13 20:36:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:14,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:14,782 INFO L508 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] [2021-07-13 20:36:14,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2103 [2021-07-13 20:36:14,983 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 28 times [2021-07-13 20:36:14,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:14,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470102173] [2021-07-13 20:36:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:15,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:15,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470102173] [2021-07-13 20:36:15,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470102173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:15,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98651138] [2021-07-13 20:36:15,324 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 [2021-07-13 20:36:15,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:36:15,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:15,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:36:15,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:15,686 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-07-13 20:36:15,802 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_174, v_prenex_175, v_prenex_176, v_prenex_177], 3=[A]} [2021-07-13 20:36:15,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:15,818 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:15,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:36:15,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:15,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:15,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:15,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:36:15,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:16,155 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-07-13 20:36:16,155 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.7 percent of original size [2021-07-13 20:36:16,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:16,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:16,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:36:16,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:16,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:16,184 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:16,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:16,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:16,345 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-07-13 20:36:16,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:16,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:16,359 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:16,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:36:16,361 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:16,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:16,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:16,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:16,375 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:16,505 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-13 20:36:16,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:16,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:16,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:16,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 24 [2021-07-13 20:36:16,521 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:16,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:16,531 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:16,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 20 [2021-07-13 20:36:16,532 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:16,649 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-07-13 20:36:16,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:16,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:16,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:16,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:16,662 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 18 treesize of output 20 [2021-07-13 20:36:16,666 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:16,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:16,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:16,676 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:36:16,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-07-13 20:36:16,677 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:16,783 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-13 20:36:16,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:16,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-13 20:36:16,789 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:421, output treesize:185 [2021-07-13 20:36:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:16,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98651138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:16,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:16,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:36:16,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994789180] [2021-07-13 20:36:16,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:16,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:16,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:16,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:16,927 INFO L87 Difference]: Start difference. First operand 1868 states and 6405 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) [2021-07-13 20:36:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:18,250 INFO L93 Difference]: Finished difference Result 2435 states and 8167 transitions. [2021-07-13 20:36:18,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:36:18,250 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 [2021-07-13 20:36:18,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:18,254 INFO L225 Difference]: With dead ends: 2435 [2021-07-13 20:36:18,254 INFO L226 Difference]: Without dead ends: 2410 [2021-07-13 20:36:18,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1522.4ms TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:36:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-07-13 20:36:18,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1870. [2021-07-13 20:36:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.42964151952916) internal successors, (6410), 1869 states have internal predecessors, (6410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:18,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6410 transitions. [2021-07-13 20:36:18,281 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6410 transitions. Word has length 26 [2021-07-13 20:36:18,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:18,281 INFO L482 AbstractCegarLoop]: Abstraction has 1870 states and 6410 transitions. [2021-07-13 20:36:18,281 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) [2021-07-13 20:36:18,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6410 transitions. [2021-07-13 20:36:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:18,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:18,284 INFO L508 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] [2021-07-13 20:36:18,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2140,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:18,484 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:18,485 INFO L82 PathProgramCache]: Analyzing trace with hash 654380625, now seen corresponding path program 29 times [2021-07-13 20:36:18,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:18,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569099094] [2021-07-13 20:36:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:18,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:18,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569099094] [2021-07-13 20:36:18,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569099094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:18,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441018005] [2021-07-13 20:36:18,842 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 [2021-07-13 20:36:18,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:36:18,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:18,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:36:18,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:19,399 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-13 20:36:19,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,512 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:19,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:36:19,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:19,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-13 20:36:19,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,903 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 125 [2021-07-13 20:36:19,904 INFO L628 ElimStorePlain]: treesize reduction 72, result has 84.8 percent of original size [2021-07-13 20:36:19,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:19,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-13 20:36:19,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:19,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:19,934 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:19,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-07-13 20:36:19,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,220 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2021-07-13 20:36:20,220 INFO L628 ElimStorePlain]: treesize reduction 21, result has 94.2 percent of original size [2021-07-13 20:36:20,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,234 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:20,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:36:20,235 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,372 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:36:20,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:20,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,386 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:20,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:20,387 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,516 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-13 20:36:20,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:20,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:20,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:36:20,533 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,656 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-07-13 20:36:20,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:20,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,668 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:36:20,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:36:20,669 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,788 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-13 20:36:20,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:20,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:20,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:36:20,802 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,914 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-13 20:36:20,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:20,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:20,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:36:20,929 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:20,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:20,938 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:36:20,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 1 [2021-07-13 20:36:20,938 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:21,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:21,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:36:21,032 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:539, output treesize:156 [2021-07-13 20:36:21,185 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-07-13 20:36:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:21,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441018005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:21,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:21,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:36:21,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986916344] [2021-07-13 20:36:21,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:36:21,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:21,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:36:21,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:36:21,225 INFO L87 Difference]: Start difference. First operand 1870 states and 6410 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) [2021-07-13 20:36:22,184 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-07-13 20:36:22,607 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-07-13 20:36:22,878 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-07-13 20:36:23,092 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-07-13 20:36:23,336 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-13 20:36:23,567 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-13 20:36:23,706 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-07-13 20:36:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:23,793 INFO L93 Difference]: Finished difference Result 2744 states and 8990 transitions. [2021-07-13 20:36:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:36:23,793 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 [2021-07-13 20:36:23,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:23,808 INFO L225 Difference]: With dead ends: 2744 [2021-07-13 20:36:23,808 INFO L226 Difference]: Without dead ends: 2710 [2021-07-13 20:36:23,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2913.9ms TimeCoverageRelationStatistics Valid=307, Invalid=1333, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:36:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2021-07-13 20:36:23,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1870. [2021-07-13 20:36:23,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.4307116104868913) internal successors, (6412), 1869 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6412 transitions. [2021-07-13 20:36:23,836 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6412 transitions. Word has length 26 [2021-07-13 20:36:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:23,836 INFO L482 AbstractCegarLoop]: Abstraction has 1870 states and 6412 transitions. [2021-07-13 20:36:23,836 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) [2021-07-13 20:36:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6412 transitions. [2021-07-13 20:36:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:23,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:23,839 INFO L508 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] [2021-07-13 20:36:24,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2177 [2021-07-13 20:36:24,039 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:24,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:24,040 INFO L82 PathProgramCache]: Analyzing trace with hash -275202939, now seen corresponding path program 48 times [2021-07-13 20:36:24,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:24,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117083128] [2021-07-13 20:36:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:24,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:24,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117083128] [2021-07-13 20:36:24,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117083128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:24,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280255873] [2021-07-13 20:36:24,426 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 [2021-07-13 20:36:24,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:36:24,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:24,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:36:24,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:25,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:36:25,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:36:25,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,031 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:36:25,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:36:25,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:36:25,046 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:36:25,053 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:36:25,060 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:36:25,068 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:36:25,075 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:36:25,082 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:36:25,089 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:36:25,096 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:36:25,103 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:36:25,135 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:25,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:25,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:36:25,139 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:25,159 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-07-13 20:36:25,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:36:25,160 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-13 20:36:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:25,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280255873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:25,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:25,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:36:25,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246163885] [2021-07-13 20:36:25,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:36:25,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:25,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:36:25,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:36:25,184 INFO L87 Difference]: Start difference. First operand 1870 states and 6412 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) [2021-07-13 20:36:26,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:26,869 INFO L93 Difference]: Finished difference Result 2342 states and 7805 transitions. [2021-07-13 20:36:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:36:26,870 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 [2021-07-13 20:36:26,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:26,874 INFO L225 Difference]: With dead ends: 2342 [2021-07-13 20:36:26,874 INFO L226 Difference]: Without dead ends: 2320 [2021-07-13 20:36:26,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1778.1ms TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:36:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-07-13 20:36:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1866. [2021-07-13 20:36:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.429490616621984) internal successors, (6396), 1865 states have internal predecessors, (6396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6396 transitions. [2021-07-13 20:36:26,912 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6396 transitions. Word has length 26 [2021-07-13 20:36:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:26,912 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6396 transitions. [2021-07-13 20:36:26,912 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) [2021-07-13 20:36:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6396 transitions. [2021-07-13 20:36:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:26,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:26,915 INFO L508 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] [2021-07-13 20:36:27,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2204 [2021-07-13 20:36:27,115 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:27,116 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 49 times [2021-07-13 20:36:27,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:27,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249261906] [2021-07-13 20:36:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:27,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:27,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249261906] [2021-07-13 20:36:27,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249261906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:27,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624949479] [2021-07-13 20:36:27,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:36:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:27,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:36:27,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:27,683 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_196], 5=[v_prenex_198, v_prenex_200]} [2021-07-13 20:36:27,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:27,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:27,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:27,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:27,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:36:27,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:27,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:27,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:27,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:27,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:36:27,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:27,789 INFO L628 ElimStorePlain]: treesize reduction 130, result has 40.1 percent of original size [2021-07-13 20:36:27,789 INFO L518 ElimStorePlain]: Eliminatee v_prenex_196 vanished before elimination [2021-07-13 20:36:27,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:27,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:27,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:27,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:36:27,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:27,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:27,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:27,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:27,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:27,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:27,822 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 25 treesize of output 13 [2021-07-13 20:36:27,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:27,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:27,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:36:27,844 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:29 [2021-07-13 20:36:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:27,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624949479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:27,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:27,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:36:27,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748111325] [2021-07-13 20:36:27,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:27,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:27,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:27,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:27,883 INFO L87 Difference]: Start difference. First operand 1866 states and 6396 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) [2021-07-13 20:36:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:29,268 INFO L93 Difference]: Finished difference Result 2566 states and 8529 transitions. [2021-07-13 20:36:29,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:36:29,269 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 [2021-07-13 20:36:29,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:29,273 INFO L225 Difference]: With dead ends: 2566 [2021-07-13 20:36:29,273 INFO L226 Difference]: Without dead ends: 2551 [2021-07-13 20:36:29,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1402.7ms TimeCoverageRelationStatistics Valid=321, Invalid=1319, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:36:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-07-13 20:36:29,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 1866. [2021-07-13 20:36:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.429490616621984) internal successors, (6396), 1865 states have internal predecessors, (6396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6396 transitions. [2021-07-13 20:36:29,302 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6396 transitions. Word has length 26 [2021-07-13 20:36:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:29,302 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6396 transitions. [2021-07-13 20:36:29,302 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) [2021-07-13 20:36:29,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6396 transitions. [2021-07-13 20:36:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:29,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:29,305 INFO L508 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] [2021-07-13 20:36:29,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2300 [2021-07-13 20:36:29,505 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash -527613613, now seen corresponding path program 50 times [2021-07-13 20:36:29,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:29,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006158515] [2021-07-13 20:36:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:29,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:29,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006158515] [2021-07-13 20:36:29,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006158515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:29,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487715908] [2021-07-13 20:36:29,788 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 [2021-07-13 20:36:29,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:36:29,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:29,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:36:29,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:30,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,048 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-07-13 20:36:30,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 37 [2021-07-13 20:36:30,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,078 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:36:30,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-13 20:36:30,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,107 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-07-13 20:36:30,107 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 34 treesize of output 26 [2021-07-13 20:36:30,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,124 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:36:30,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:36:30,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,152 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-07-13 20:36:30,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-13 20:36:30,156 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,181 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-07-13 20:36:30,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2021-07-13 20:36:30,183 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,207 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-13 20:36:30,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 25 [2021-07-13 20:36:30,209 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,225 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:36:30,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:36:30,226 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,242 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:36:30,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:36:30,243 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,268 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-13 20:36:30,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 26 [2021-07-13 20:36:30,270 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,295 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-13 20:36:30,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-07-13 20:36:30,296 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,313 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:36:30,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:36:30,313 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,329 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:36:30,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:36:30,330 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:30,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-13 20:36:30,361 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,384 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-13 20:36:30,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-13 20:36:30,401 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:30,410 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:36:30,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:36:30,411 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:30,493 INFO L628 ElimStorePlain]: treesize reduction 109, result has 41.7 percent of original size [2021-07-13 20:36:30,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:36:30,494 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:705, output treesize:78 [2021-07-13 20:36:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:30,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487715908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:30,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:30,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-07-13 20:36:30,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860476698] [2021-07-13 20:36:30,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:36:30,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:30,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:36:30,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:36:30,580 INFO L87 Difference]: Start difference. First operand 1866 states and 6396 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) [2021-07-13 20:36:32,203 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-07-13 20:36:32,510 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-07-13 20:36:33,195 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-07-13 20:36:34,741 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-13 20:36:35,413 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-07-13 20:36:35,671 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-07-13 20:36:36,033 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-07-13 20:36:36,471 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-07-13 20:36:36,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:36,936 INFO L93 Difference]: Finished difference Result 3357 states and 10803 transitions. [2021-07-13 20:36:36,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 20:36:36,936 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 [2021-07-13 20:36:36,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:36,941 INFO L225 Difference]: With dead ends: 3357 [2021-07-13 20:36:36,942 INFO L226 Difference]: Without dead ends: 3310 [2021-07-13 20:36:36,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 5715.2ms TimeCoverageRelationStatistics Valid=1266, Invalid=7106, Unknown=0, NotChecked=0, Total=8372 [2021-07-13 20:36:36,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-07-13 20:36:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 1970. [2021-07-13 20:36:36,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 3.420518029456577) internal successors, (6735), 1969 states have internal predecessors, (6735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 6735 transitions. [2021-07-13 20:36:36,974 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 6735 transitions. Word has length 26 [2021-07-13 20:36:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:36,974 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 6735 transitions. [2021-07-13 20:36:36,975 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) [2021-07-13 20:36:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 6735 transitions. [2021-07-13 20:36:36,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:36,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:36,977 INFO L508 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] [2021-07-13 20:36:37,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2314,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:37,180 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:37,180 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-07-13 20:36:37,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:37,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915158939] [2021-07-13 20:36:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:37,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:37,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915158939] [2021-07-13 20:36:37,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915158939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:37,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82846150] [2021-07-13 20:36:37,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:37,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:36:37,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:37,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:36:37,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:38,058 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-07-13 20:36:38,304 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_206, v_prenex_208, v_prenex_210, v_prenex_212, v_prenex_202, v_prenex_214], 6=[A, v_prenex_204]} [2021-07-13 20:36:38,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,361 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-07-13 20:36:38,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 32 [2021-07-13 20:36:38,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:38,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,417 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-07-13 20:36:38,418 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 39 [2021-07-13 20:36:38,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:38,867 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-07-13 20:36:38,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:38,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,915 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-07-13 20:36:38,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 43 [2021-07-13 20:36:38,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:38,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:38,955 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-07-13 20:36:38,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 36 [2021-07-13 20:36:38,959 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:39,356 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-07-13 20:36:39,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:39,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:39,399 INFO L354 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2021-07-13 20:36:39,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 34 [2021-07-13 20:36:39,404 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:39,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:39,448 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-07-13 20:36:39,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 47 [2021-07-13 20:36:39,452 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:39,832 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-13 20:36:39,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:39,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:39,880 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-07-13 20:36:39,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 43 [2021-07-13 20:36:39,884 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:39,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:39,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:39,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 55 [2021-07-13 20:36:39,926 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:41,010 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 161 DAG size of output: 150 [2021-07-13 20:36:41,010 INFO L628 ElimStorePlain]: treesize reduction 72, result has 90.2 percent of original size [2021-07-13 20:36:41,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:41,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:41,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 55 [2021-07-13 20:36:41,053 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:41,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:41,089 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-07-13 20:36:41,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 43 [2021-07-13 20:36:41,093 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:41,757 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 147 [2021-07-13 20:36:41,758 INFO L628 ElimStorePlain]: treesize reduction 34, result has 94.9 percent of original size [2021-07-13 20:36:41,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:41,800 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-07-13 20:36:41,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:36:41,804 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:41,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:41,829 INFO L354 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2021-07-13 20:36:41,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 28 [2021-07-13 20:36:41,831 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:42,150 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-07-13 20:36:42,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:42,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:42,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:42,187 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-07-13 20:36:42,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-07-13 20:36:42,192 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:42,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:42,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:42,208 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-13 20:36:42,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:36:42,208 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:42,475 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-13 20:36:42,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:42,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:42,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:42,511 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-07-13 20:36:42,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-07-13 20:36:42,516 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:42,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:42,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:42,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 20:36:42,549 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:42,797 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-13 20:36:42,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:42,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-07-13 20:36:42,822 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:829, output treesize:777 [2021-07-13 20:36:43,207 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 41 [2021-07-13 20:36:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:43,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82846150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:43,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:43,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-07-13 20:36:43,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408320421] [2021-07-13 20:36:43,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:36:43,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:43,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:36:43,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:36:43,369 INFO L87 Difference]: Start difference. First operand 1970 states and 6735 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) [2021-07-13 20:36:44,474 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-07-13 20:36:45,082 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-07-13 20:36:45,562 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-07-13 20:36:50,456 WARN L205 SmtUtils]: Spent 4.82 s on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-07-13 20:36:50,786 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-07-13 20:36:52,134 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 119 DAG size of output: 79 [2021-07-13 20:36:52,372 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-07-13 20:36:52,567 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-07-13 20:36:53,027 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-07-13 20:36:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:53,117 INFO L93 Difference]: Finished difference Result 3232 states and 10559 transitions. [2021-07-13 20:36:53,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:36:53,121 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 [2021-07-13 20:36:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:53,128 INFO L225 Difference]: With dead ends: 3232 [2021-07-13 20:36:53,128 INFO L226 Difference]: Without dead ends: 3187 [2021-07-13 20:36:53,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 10110.3ms TimeCoverageRelationStatistics Valid=609, Invalid=2931, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:36:53,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-07-13 20:36:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 2005. [2021-07-13 20:36:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 3.4266467065868262) internal successors, (6867), 2004 states have internal predecessors, (6867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 6867 transitions. [2021-07-13 20:36:53,175 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 6867 transitions. Word has length 26 [2021-07-13 20:36:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:53,175 INFO L482 AbstractCegarLoop]: Abstraction has 2005 states and 6867 transitions. [2021-07-13 20:36:53,175 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) [2021-07-13 20:36:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 6867 transitions. [2021-07-13 20:36:53,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:53,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:53,178 INFO L508 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] [2021-07-13 20:36:53,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2343 [2021-07-13 20:36:53,378 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:53,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:53,378 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-07-13 20:36:53,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:53,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995164613] [2021-07-13 20:36:53,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:53,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:53,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995164613] [2021-07-13 20:36:53,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995164613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:53,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41542139] [2021-07-13 20:36:53,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:36:53,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:36:53,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:53,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:36:53,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:54,203 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-07-13 20:36:54,363 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_226], 5=[v_prenex_222, v_prenex_224]} [2021-07-13 20:36:54,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:54,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:54,369 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 23 treesize of output 13 [2021-07-13 20:36:54,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:54,463 INFO L628 ElimStorePlain]: treesize reduction 137, result has 41.9 percent of original size [2021-07-13 20:36:54,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:54,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:54,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:36:54,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:54,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:54,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:54,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:54,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:54,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:54,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:36:54,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:54,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:54,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:36:54,528 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 23 treesize of output 13 [2021-07-13 20:36:54,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:54,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:54,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:36:54,551 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:22 [2021-07-13 20:36:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:54,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41542139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:54,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:54,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:36:54,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899877791] [2021-07-13 20:36:54,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:54,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:54,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:54,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:54,590 INFO L87 Difference]: Start difference. First operand 2005 states and 6867 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) [2021-07-13 20:36:56,626 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-07-13 20:36:57,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:57,151 INFO L93 Difference]: Finished difference Result 2655 states and 8819 transitions. [2021-07-13 20:36:57,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:36:57,151 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 [2021-07-13 20:36:57,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:57,155 INFO L225 Difference]: With dead ends: 2655 [2021-07-13 20:36:57,156 INFO L226 Difference]: Without dead ends: 2640 [2021-07-13 20:36:57,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 2675.4ms TimeCoverageRelationStatistics Valid=482, Invalid=2170, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:36:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-07-13 20:36:57,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2003. [2021-07-13 20:36:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.4265734265734267) internal successors, (6860), 2002 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6860 transitions. [2021-07-13 20:36:57,185 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6860 transitions. Word has length 26 [2021-07-13 20:36:57,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:57,185 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 6860 transitions. [2021-07-13 20:36:57,185 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) [2021-07-13 20:36:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6860 transitions. [2021-07-13 20:36:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:57,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:57,188 INFO L508 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] [2021-07-13 20:36:57,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2428,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:57,388 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:57,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-07-13 20:36:57,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:57,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361655391] [2021-07-13 20:36:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:57,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:57,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361655391] [2021-07-13 20:36:57,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361655391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:57,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402062529] [2021-07-13 20:36:57,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:57,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:36:57,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:57,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:36:57,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:58,197 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:36:58,393 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-13 20:36:58,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:58,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:58,634 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:36:58,635 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 28 treesize of output 26 [2021-07-13 20:36:58,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:58,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:58,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:58,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:58,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 20:36:58,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,075 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-07-13 20:36:59,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:59,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,111 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:36:59,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-07-13 20:36:59,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,144 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:36:59,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:36:59,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,827 WARN L205 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 148 [2021-07-13 20:36:59,827 INFO L628 ElimStorePlain]: treesize reduction 29, result has 95.9 percent of original size [2021-07-13 20:36:59,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,866 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:36:59,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-13 20:36:59,870 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:59,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:59,895 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:36:59,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-13 20:36:59,896 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,201 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-07-13 20:37:00,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:00,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:00,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:00,239 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:37:00,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-13 20:37:00,243 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:00,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:00,278 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:37:00,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-13 20:37:00,282 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,563 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-13 20:37:00,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:00,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:00,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:00,598 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:37:00,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-13 20:37:00,599 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:00,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:00,623 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:37:00,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-13 20:37:00,625 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,891 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-13 20:37:00,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:00,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:00,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:00,941 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:37:00,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-07-13 20:37:00,944 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:00,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:00,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:00,967 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:37:00,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-07-13 20:37:00,969 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:01,227 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-13 20:37:01,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:01,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:01,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:01,256 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:37:01,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-07-13 20:37:01,258 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:01,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:01,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:01,282 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:37:01,282 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 30 treesize of output 32 [2021-07-13 20:37:01,286 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:01,739 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 104 [2021-07-13 20:37:01,740 INFO L628 ElimStorePlain]: treesize reduction 29, result has 93.8 percent of original size [2021-07-13 20:37:01,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:01,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:01,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:01,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-13 20:37:01,777 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:01,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:01,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:01,789 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:37:01,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:37:01,790 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:01,977 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-13 20:37:01,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:01,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-13 20:37:01,991 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:793, output treesize:352 [2021-07-13 20:37:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:02,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402062529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:02,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:02,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-07-13 20:37:02,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104340636] [2021-07-13 20:37:02,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:37:02,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:02,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:37:02,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:37:02,160 INFO L87 Difference]: Start difference. First operand 2003 states and 6860 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) [2021-07-13 20:37:06,387 WARN L205 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-13 20:37:07,354 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-07-13 20:37:08,460 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 173 DAG size of output: 115 [2021-07-13 20:37:09,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:09,148 INFO L93 Difference]: Finished difference Result 2890 states and 9570 transitions. [2021-07-13 20:37:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:37:09,148 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 [2021-07-13 20:37:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:09,153 INFO L225 Difference]: With dead ends: 2890 [2021-07-13 20:37:09,153 INFO L226 Difference]: Without dead ends: 2860 [2021-07-13 20:37:09,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 7174.0ms TimeCoverageRelationStatistics Valid=522, Invalid=2448, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:37:09,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-07-13 20:37:09,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2003. [2021-07-13 20:37:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.4265734265734267) internal successors, (6860), 2002 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6860 transitions. [2021-07-13 20:37:09,184 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6860 transitions. Word has length 26 [2021-07-13 20:37:09,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:09,184 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 6860 transitions. [2021-07-13 20:37:09,184 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) [2021-07-13 20:37:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6860 transitions. [2021-07-13 20:37:09,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:09,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:09,187 INFO L508 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] [2021-07-13 20:37:09,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2442 [2021-07-13 20:37:09,388 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:09,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:09,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1001444339, now seen corresponding path program 54 times [2021-07-13 20:37:09,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:09,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553627985] [2021-07-13 20:37:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:09,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:09,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553627985] [2021-07-13 20:37:09,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553627985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:09,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086284658] [2021-07-13 20:37:09,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:09,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:37:09,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:09,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:37:09,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:09,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:09,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:09,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:09,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-07-13 20:37:09,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:09,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:09,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:09,980 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-13 20:37:09,980 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 37 treesize of output 31 [2021-07-13 20:37:09,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:09,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:09,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,008 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-07-13 20:37:10,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-07-13 20:37:10,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,025 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:37:10,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:37:10,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,050 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-07-13 20:37:10,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-07-13 20:37:10,052 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,068 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:37:10,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:10,069 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,084 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:37:10,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:37:10,084 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,100 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:37:10,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:37:10,100 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,123 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-07-13 20:37:10,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-07-13 20:37:10,125 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,140 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:37:10,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:37:10,141 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,167 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-13 20:37:10,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-07-13 20:37:10,171 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,195 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-13 20:37:10,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-07-13 20:37:10,197 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,212 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:37:10,212 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 37 treesize of output 1 [2021-07-13 20:37:10,213 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,228 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:37:10,228 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 37 treesize of output 1 [2021-07-13 20:37:10,229 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,243 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:37:10,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 20:37:10,244 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:10,252 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-13 20:37:10,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:37:10,253 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:10,327 INFO L628 ElimStorePlain]: treesize reduction 42, result has 65.0 percent of original size [2021-07-13 20:37:10,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:37:10,328 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:78 [2021-07-13 20:37:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:10,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086284658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:10,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:10,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:37:10,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098271464] [2021-07-13 20:37:10,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:10,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:10,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:10,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:10,417 INFO L87 Difference]: Start difference. First operand 2003 states and 6860 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) [2021-07-13 20:37:11,265 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-07-13 20:37:11,882 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-07-13 20:37:12,456 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-07-13 20:37:12,890 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-07-13 20:37:13,138 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2021-07-13 20:37:13,405 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-07-13 20:37:13,737 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2021-07-13 20:37:14,354 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-07-13 20:37:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:14,432 INFO L93 Difference]: Finished difference Result 3566 states and 11484 transitions. [2021-07-13 20:37:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:37:14,433 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 [2021-07-13 20:37:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:14,440 INFO L225 Difference]: With dead ends: 3566 [2021-07-13 20:37:14,440 INFO L226 Difference]: Without dead ends: 3532 [2021-07-13 20:37:14,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 3728.1ms TimeCoverageRelationStatistics Valid=879, Invalid=3153, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:37:14,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3532 states. [2021-07-13 20:37:14,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3532 to 2009. [2021-07-13 20:37:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.431772908366534) internal successors, (6891), 2008 states have internal predecessors, (6891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:14,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 6891 transitions. [2021-07-13 20:37:14,489 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 6891 transitions. Word has length 26 [2021-07-13 20:37:14,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:14,490 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 6891 transitions. [2021-07-13 20:37:14,490 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) [2021-07-13 20:37:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 6891 transitions. [2021-07-13 20:37:14,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:14,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:14,493 INFO L508 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] [2021-07-13 20:37:14,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2508,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:14,693 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:14,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:14,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1556883255, now seen corresponding path program 30 times [2021-07-13 20:37:14,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:14,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345418095] [2021-07-13 20:37:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:14,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:14,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345418095] [2021-07-13 20:37:14,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345418095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:14,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186687331] [2021-07-13 20:37:14,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:14,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:37:14,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:14,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:37:14,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:15,362 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:15,362 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-07-13 20:37:15,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,379 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:15,379 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:15,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,392 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:15,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:15,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:15,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 32 [2021-07-13 20:37:15,423 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,449 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:15,449 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-07-13 20:37:15,451 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,479 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:15,480 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:37:15,482 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,496 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:15,496 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 28 treesize of output 16 [2021-07-13 20:37:15,497 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:15,520 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 16 treesize of output 26 [2021-07-13 20:37:15,527 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,539 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:15,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:15,540 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,550 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:15,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:15,551 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,568 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:15,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:37:15,570 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,580 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:15,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:15,581 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,599 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:15,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:37:15,603 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,612 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:15,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:15,613 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,621 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:15,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:15,622 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,628 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:15,628 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:15,629 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:15,761 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-07-13 20:37:15,762 INFO L628 ElimStorePlain]: treesize reduction 29, result has 83.9 percent of original size [2021-07-13 20:37:15,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:37:15,765 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:697, output treesize:177 [2021-07-13 20:37:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:15,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186687331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:15,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:15,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:37:15,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376269665] [2021-07-13 20:37:15,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:37:15,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:15,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:37:15,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:37:15,955 INFO L87 Difference]: Start difference. First operand 2009 states and 6891 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) [2021-07-13 20:37:16,936 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-07-13 20:37:17,822 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-07-13 20:37:17,995 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-07-13 20:37:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:18,042 INFO L93 Difference]: Finished difference Result 2493 states and 8335 transitions. [2021-07-13 20:37:18,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:37:18,042 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 [2021-07-13 20:37:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:18,046 INFO L225 Difference]: With dead ends: 2493 [2021-07-13 20:37:18,047 INFO L226 Difference]: Without dead ends: 2478 [2021-07-13 20:37:18,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1953.8ms TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:37:18,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-07-13 20:37:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2002. [2021-07-13 20:37:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.4302848575712144) internal successors, (6864), 2001 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 6864 transitions. [2021-07-13 20:37:18,099 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 6864 transitions. Word has length 26 [2021-07-13 20:37:18,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:18,100 INFO L482 AbstractCegarLoop]: Abstraction has 2002 states and 6864 transitions. [2021-07-13 20:37:18,100 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) [2021-07-13 20:37:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 6864 transitions. [2021-07-13 20:37:18,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:18,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:18,103 INFO L508 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] [2021-07-13 20:37:18,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2535 [2021-07-13 20:37:18,319 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:18,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:18,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1386281111, now seen corresponding path program 31 times [2021-07-13 20:37:18,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:18,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136244843] [2021-07-13 20:37:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:18,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:18,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:18,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136244843] [2021-07-13 20:37:18,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136244843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:18,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620546451] [2021-07-13 20:37:18,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:18,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:37:18,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:18,891 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-07-13 20:37:19,105 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-07-13 20:37:19,181 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_249], 2=[A, v_prenex_250]} [2021-07-13 20:37:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:19,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:19,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:19,282 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-07-13 20:37:19,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:19,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:37:19,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:19,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:19,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:19,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-07-13 20:37:19,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:19,345 INFO L628 ElimStorePlain]: treesize reduction 13, result has 83.5 percent of original size [2021-07-13 20:37:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:19,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:19,349 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 23 treesize of output 13 [2021-07-13 20:37:19,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:19,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:19,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:37:19,374 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-07-13 20:37:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:19,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620546451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:19,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:19,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:37:19,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646601625] [2021-07-13 20:37:19,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:37:19,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:19,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:37:19,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:37:19,415 INFO L87 Difference]: Start difference. First operand 2002 states and 6864 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) [2021-07-13 20:37:20,449 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:37:20,789 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-07-13 20:37:20,969 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-07-13 20:37:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:21,170 INFO L93 Difference]: Finished difference Result 2918 states and 9622 transitions. [2021-07-13 20:37:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:37:21,170 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 [2021-07-13 20:37:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:21,175 INFO L225 Difference]: With dead ends: 2918 [2021-07-13 20:37:21,175 INFO L226 Difference]: Without dead ends: 2873 [2021-07-13 20:37:21,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1958.2ms TimeCoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:37:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2021-07-13 20:37:21,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2019. [2021-07-13 20:37:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2018 states have (on average 3.4345887016848367) internal successors, (6931), 2018 states have internal predecessors, (6931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 6931 transitions. [2021-07-13 20:37:21,207 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 6931 transitions. Word has length 26 [2021-07-13 20:37:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:21,207 INFO L482 AbstractCegarLoop]: Abstraction has 2019 states and 6931 transitions. [2021-07-13 20:37:21,207 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) [2021-07-13 20:37:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 6931 transitions. [2021-07-13 20:37:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:21,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:21,209 INFO L508 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] [2021-07-13 20:37:21,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2592,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:21,413 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:21,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:21,413 INFO L82 PathProgramCache]: Analyzing trace with hash -231251669, now seen corresponding path program 32 times [2021-07-13 20:37:21,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:21,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460694386] [2021-07-13 20:37:21,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:21,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:21,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460694386] [2021-07-13 20:37:21,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460694386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:21,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187199664] [2021-07-13 20:37:21,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:21,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:21,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:21,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:37:21,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:21,963 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-07-13 20:37:22,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:22,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:22,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 27 [2021-07-13 20:37:22,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:22,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:22,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:22,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:37:22,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:22,402 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 120 [2021-07-13 20:37:22,402 INFO L628 ElimStorePlain]: treesize reduction 131, result has 71.4 percent of original size [2021-07-13 20:37:22,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:22,416 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:22,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:37:22,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:22,543 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-13 20:37:22,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:22,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:22,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:22,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:37:22,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:22,678 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-07-13 20:37:22,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:22,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:22,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:22,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:37:22,694 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:22,806 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-07-13 20:37:22,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:22,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:22,819 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:22,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:37:22,821 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:22,926 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-13 20:37:22,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:22,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:22,939 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:22,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:37:22,949 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:23,051 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-13 20:37:23,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:23,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:23,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:23,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:37:23,064 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:23,164 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:37:23,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:23,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:23,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:23,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:37:23,180 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:23,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:23,188 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:23,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-07-13 20:37:23,189 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:23,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:23,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:23,271 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:503, output treesize:150 [2021-07-13 20:37:23,403 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-07-13 20:37:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:23,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187199664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:23,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:23,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:37:23,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862533091] [2021-07-13 20:37:23,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:37:23,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:23,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:37:23,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:37:23,446 INFO L87 Difference]: Start difference. First operand 2019 states and 6931 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) [2021-07-13 20:37:24,402 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:37:24,567 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-07-13 20:37:24,915 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-07-13 20:37:25,207 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-07-13 20:37:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:25,362 INFO L93 Difference]: Finished difference Result 3134 states and 10334 transitions. [2021-07-13 20:37:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:37:25,362 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 [2021-07-13 20:37:25,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:25,368 INFO L225 Difference]: With dead ends: 3134 [2021-07-13 20:37:25,368 INFO L226 Difference]: Without dead ends: 3104 [2021-07-13 20:37:25,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2119.7ms TimeCoverageRelationStatistics Valid=292, Invalid=1040, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:37:25,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-07-13 20:37:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 2002. [2021-07-13 20:37:25,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.4292853573213393) internal successors, (6862), 2001 states have internal predecessors, (6862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 6862 transitions. [2021-07-13 20:37:25,401 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 6862 transitions. Word has length 26 [2021-07-13 20:37:25,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:25,401 INFO L482 AbstractCegarLoop]: Abstraction has 2002 states and 6862 transitions. [2021-07-13 20:37:25,401 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) [2021-07-13 20:37:25,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 6862 transitions. [2021-07-13 20:37:25,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:25,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:25,404 INFO L508 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] [2021-07-13 20:37:25,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2604 [2021-07-13 20:37:25,609 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:25,609 INFO L82 PathProgramCache]: Analyzing trace with hash -714132561, now seen corresponding path program 33 times [2021-07-13 20:37:25,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:25,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985797536] [2021-07-13 20:37:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:25,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:25,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985797536] [2021-07-13 20:37:25,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985797536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:25,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027793836] [2021-07-13 20:37:25,830 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 [2021-07-13 20:37:25,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:37:25,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:25,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:37:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:26,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 13 [2021-07-13 20:37:26,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-07-13 20:37:26,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:26,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:26,301 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:26,308 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,313 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:26,314 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16 [2021-07-13 20:37:26,320 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:26,327 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,332 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 33 treesize of output 19 [2021-07-13 20:37:26,333 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:37:26,340 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:26,346 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:26,352 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:26,358 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-13 20:37:26,365 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:26,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:26,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:26,368 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:26,390 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-07-13 20:37:26,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:37:26,391 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-07-13 20:37:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:26,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027793836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:26,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:26,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:37:26,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152307870] [2021-07-13 20:37:26,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:37:26,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:26,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:37:26,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:37:26,415 INFO L87 Difference]: Start difference. First operand 2002 states and 6862 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) [2021-07-13 20:37:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:27,011 INFO L93 Difference]: Finished difference Result 2504 states and 8391 transitions. [2021-07-13 20:37:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:37:27,011 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 [2021-07-13 20:37:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:27,016 INFO L225 Difference]: With dead ends: 2504 [2021-07-13 20:37:27,016 INFO L226 Difference]: Without dead ends: 2483 [2021-07-13 20:37:27,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 713.9ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:37:27,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-07-13 20:37:27,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2009. [2021-07-13 20:37:27,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.431772908366534) internal successors, (6891), 2008 states have internal predecessors, (6891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 6891 transitions. [2021-07-13 20:37:27,041 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 6891 transitions. Word has length 26 [2021-07-13 20:37:27,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:27,042 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 6891 transitions. [2021-07-13 20:37:27,042 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) [2021-07-13 20:37:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 6891 transitions. [2021-07-13 20:37:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:27,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:27,044 INFO L508 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] [2021-07-13 20:37:27,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2632 [2021-07-13 20:37:27,245 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:27,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:27,245 INFO L82 PathProgramCache]: Analyzing trace with hash -881941653, now seen corresponding path program 34 times [2021-07-13 20:37:27,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:27,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738167027] [2021-07-13 20:37:27,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:27,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:27,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738167027] [2021-07-13 20:37:27,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738167027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:27,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824397919] [2021-07-13 20:37:27,449 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 [2021-07-13 20:37:27,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:27,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:27,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:37:27,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:27,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:27,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13 [2021-07-13 20:37:27,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:27,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:37:27,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:27,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-13 20:37:27,853 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:27,860 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,865 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 21 treesize of output 13 [2021-07-13 20:37:27,866 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,872 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 28 treesize of output 16 [2021-07-13 20:37:27,873 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:27,880 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:27,886 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:37:27,892 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:27,898 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16 [2021-07-13 20:37:27,904 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:27,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:27,907 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 33 treesize of output 19 [2021-07-13 20:37:27,908 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:27,928 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:37:27,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:37:27,929 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-07-13 20:37:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:27,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824397919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:27,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:27,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:37:27,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407787003] [2021-07-13 20:37:27,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:37:27,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:27,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:37:27,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:37:27,958 INFO L87 Difference]: Start difference. First operand 2009 states and 6891 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) [2021-07-13 20:37:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:28,365 INFO L93 Difference]: Finished difference Result 2352 states and 7913 transitions. [2021-07-13 20:37:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:37:28,365 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 [2021-07-13 20:37:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:28,370 INFO L225 Difference]: With dead ends: 2352 [2021-07-13 20:37:28,370 INFO L226 Difference]: Without dead ends: 2333 [2021-07-13 20:37:28,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 549.9ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:28,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-07-13 20:37:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2003. [2021-07-13 20:37:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.4315684315684316) internal successors, (6870), 2002 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:28,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6870 transitions. [2021-07-13 20:37:28,403 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6870 transitions. Word has length 26 [2021-07-13 20:37:28,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:28,403 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 6870 transitions. [2021-07-13 20:37:28,403 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) [2021-07-13 20:37:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6870 transitions. [2021-07-13 20:37:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:28,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:28,408 INFO L508 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] [2021-07-13 20:37:28,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2674,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:28,630 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:28,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:28,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1345509615, now seen corresponding path program 35 times [2021-07-13 20:37:28,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:28,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470365016] [2021-07-13 20:37:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:28,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:28,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470365016] [2021-07-13 20:37:28,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470365016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:28,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677903099] [2021-07-13 20:37:28,845 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 [2021-07-13 20:37:28,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:37:28,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:28,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:37:28,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:29,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,211 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:29,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,224 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:29,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-13 20:37:29,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,234 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:29,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,245 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:29,246 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:29,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 24 [2021-07-13 20:37:29,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,268 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:29,268 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,278 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:29,279 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,290 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:29,291 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 21 treesize of output 17 [2021-07-13 20:37:29,292 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:29,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-13 20:37:29,307 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:29,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:37:29,321 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,330 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:29,331 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,340 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:29,341 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,352 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:29,352 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 21 treesize of output 17 [2021-07-13 20:37:29,354 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,363 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,363 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 33 treesize of output 19 [2021-07-13 20:37:29,363 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,375 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:29,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:37:29,376 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:29,382 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:37:29,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:37:29,383 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:29,488 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-07-13 20:37:29,489 INFO L628 ElimStorePlain]: treesize reduction 24, result has 82.5 percent of original size [2021-07-13 20:37:29,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:37:29,490 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:91 [2021-07-13 20:37:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:29,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677903099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:29,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:29,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:37:29,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82343618] [2021-07-13 20:37:29,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:37:29,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:29,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:37:29,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:37:29,585 INFO L87 Difference]: Start difference. First operand 2003 states and 6870 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) [2021-07-13 20:37:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:31,039 INFO L93 Difference]: Finished difference Result 2949 states and 9724 transitions. [2021-07-13 20:37:31,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:37:31,040 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 [2021-07-13 20:37:31,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:31,045 INFO L225 Difference]: With dead ends: 2949 [2021-07-13 20:37:31,045 INFO L226 Difference]: Without dead ends: 2899 [2021-07-13 20:37:31,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1380.2ms TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:37:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-07-13 20:37:31,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 1994. [2021-07-13 20:37:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.4290015052684395) internal successors, (6834), 1993 states have internal predecessors, (6834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6834 transitions. [2021-07-13 20:37:31,076 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6834 transitions. Word has length 26 [2021-07-13 20:37:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:31,076 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 6834 transitions. [2021-07-13 20:37:31,076 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) [2021-07-13 20:37:31,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6834 transitions. [2021-07-13 20:37:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:31,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:31,079 INFO L508 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] [2021-07-13 20:37:31,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2718,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:31,280 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:31,280 INFO L82 PathProgramCache]: Analyzing trace with hash -583168205, now seen corresponding path program 36 times [2021-07-13 20:37:31,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:31,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144002929] [2021-07-13 20:37:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:31,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:31,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144002929] [2021-07-13 20:37:31,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144002929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:31,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565299074] [2021-07-13 20:37:31,467 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 [2021-07-13 20:37:31,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:37:31,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:31,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:37:31,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:31,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:31,826 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 30 treesize of output 24 [2021-07-13 20:37:31,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,839 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:31,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:37:31,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,963 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-13 20:37:31,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:31,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,977 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:31,977 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 21 treesize of output 17 [2021-07-13 20:37:31,979 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:31,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:31,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:31,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:37:31,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:32,102 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-13 20:37:32,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:32,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:32,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:32,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:37:32,117 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:32,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:32,127 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:32,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:37:32,128 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:32,231 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-07-13 20:37:32,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:32,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:32,245 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:32,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:37:32,246 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:32,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:32,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:32,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-13 20:37:32,258 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:32,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:32,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:32,349 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:293, output treesize:141 [2021-07-13 20:37:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:32,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565299074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:32,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:32,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:37:32,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516859214] [2021-07-13 20:37:32,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:32,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:32,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:32,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:32,498 INFO L87 Difference]: Start difference. First operand 1994 states and 6834 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) [2021-07-13 20:37:33,140 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-07-13 20:37:33,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:33,387 INFO L93 Difference]: Finished difference Result 2201 states and 7427 transitions. [2021-07-13 20:37:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:37:33,387 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 [2021-07-13 20:37:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:33,392 INFO L225 Difference]: With dead ends: 2201 [2021-07-13 20:37:33,392 INFO L226 Difference]: Without dead ends: 2176 [2021-07-13 20:37:33,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 993.3ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:37:33,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-07-13 20:37:33,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1990. [2021-07-13 20:37:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 3.431875314228255) internal successors, (6826), 1989 states have internal predecessors, (6826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 6826 transitions. [2021-07-13 20:37:33,425 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 6826 transitions. Word has length 26 [2021-07-13 20:37:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:33,425 INFO L482 AbstractCegarLoop]: Abstraction has 1990 states and 6826 transitions. [2021-07-13 20:37:33,425 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) [2021-07-13 20:37:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 6826 transitions. [2021-07-13 20:37:33,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:33,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:33,429 INFO L508 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] [2021-07-13 20:37:33,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2767,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:33,639 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:33,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:33,640 INFO L82 PathProgramCache]: Analyzing trace with hash -129711505, now seen corresponding path program 37 times [2021-07-13 20:37:33,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:33,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091364939] [2021-07-13 20:37:33,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:33,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:33,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091364939] [2021-07-13 20:37:33,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091364939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:33,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538871573] [2021-07-13 20:37:33,871 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 [2021-07-13 20:37:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:33,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:37:33,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:34,201 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-07-13 20:37:34,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:34,346 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:34,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:37:34,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:34,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:34,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:34,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:37:34,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:34,694 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-07-13 20:37:34,694 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.7 percent of original size [2021-07-13 20:37:34,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:34,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:34,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:37:34,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:34,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:34,722 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:34,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:37:34,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:34,878 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:37:34,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:34,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:34,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:34,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 24 [2021-07-13 20:37:34,897 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:34,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:34,909 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:34,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:37:34,910 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,048 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-13 20:37:35,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:35,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:35,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:37:35,064 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:35,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:37:35,076 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,327 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-07-13 20:37:35,328 INFO L628 ElimStorePlain]: treesize reduction 4, result has 98.5 percent of original size [2021-07-13 20:37:35,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:35,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:37:35,345 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:35,356 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:35,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:37:35,357 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:35,464 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-07-13 20:37:35,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:35,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-13 20:37:35,471 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:407, output treesize:170 [2021-07-13 20:37:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:35,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538871573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:35,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:35,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:37:35,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436589533] [2021-07-13 20:37:35,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:35,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:35,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:35,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:35,610 INFO L87 Difference]: Start difference. First operand 1990 states and 6826 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) [2021-07-13 20:37:36,308 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-07-13 20:37:36,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:36,494 INFO L93 Difference]: Finished difference Result 2694 states and 8981 transitions. [2021-07-13 20:37:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:37:36,494 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 [2021-07-13 20:37:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:36,498 INFO L225 Difference]: With dead ends: 2694 [2021-07-13 20:37:36,499 INFO L226 Difference]: Without dead ends: 2648 [2021-07-13 20:37:36,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1097.4ms TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:37:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-07-13 20:37:36,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1999. [2021-07-13 20:37:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 3.4334334334334335) internal successors, (6860), 1998 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 6860 transitions. [2021-07-13 20:37:36,526 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 6860 transitions. Word has length 26 [2021-07-13 20:37:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:36,526 INFO L482 AbstractCegarLoop]: Abstraction has 1999 states and 6860 transitions. [2021-07-13 20:37:36,526 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) [2021-07-13 20:37:36,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 6860 transitions. [2021-07-13 20:37:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:36,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:36,529 INFO L508 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] [2021-07-13 20:37:36,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2798 [2021-07-13 20:37:36,730 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:36,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:36,730 INFO L82 PathProgramCache]: Analyzing trace with hash -858801881, now seen corresponding path program 38 times [2021-07-13 20:37:36,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:36,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591771707] [2021-07-13 20:37:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:36,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:36,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591771707] [2021-07-13 20:37:36,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591771707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:36,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018802524] [2021-07-13 20:37:36,950 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 [2021-07-13 20:37:36,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:36,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:36,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:37:36,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:37,372 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-13 20:37:37,690 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2021-07-13 20:37:37,773 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_290, v_prenex_289]} [2021-07-13 20:37:37,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:37,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:37,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:37,900 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-07-13 20:37:37,900 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-07-13 20:37:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:37,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:37:37,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:37,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:37,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:37,909 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:37:37,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:37,965 INFO L628 ElimStorePlain]: treesize reduction 13, result has 83.5 percent of original size [2021-07-13 20:37:37,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:37,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:37,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:37:37,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:37,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:37,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:37:37,993 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-07-13 20:37:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:38,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018802524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:38,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:38,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:37:38,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746845253] [2021-07-13 20:37:38,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:38,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:38,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:38,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:38,035 INFO L87 Difference]: Start difference. First operand 1999 states and 6860 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) [2021-07-13 20:37:38,877 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:37:39,268 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 86 [2021-07-13 20:37:39,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:39,449 INFO L93 Difference]: Finished difference Result 2703 states and 8943 transitions. [2021-07-13 20:37:39,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:37:39,450 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 [2021-07-13 20:37:39,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:39,454 INFO L225 Difference]: With dead ends: 2703 [2021-07-13 20:37:39,454 INFO L226 Difference]: Without dead ends: 2658 [2021-07-13 20:37:39,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1816.1ms TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:37:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2021-07-13 20:37:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 1983. [2021-07-13 20:37:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.43087790110999) internal successors, (6800), 1982 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 6800 transitions. [2021-07-13 20:37:39,482 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 6800 transitions. Word has length 26 [2021-07-13 20:37:39,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:39,482 INFO L482 AbstractCegarLoop]: Abstraction has 1983 states and 6800 transitions. [2021-07-13 20:37:39,482 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) [2021-07-13 20:37:39,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 6800 transitions. [2021-07-13 20:37:39,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:39,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:39,485 INFO L508 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] [2021-07-13 20:37:39,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2835,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:39,685 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:39,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 39 times [2021-07-13 20:37:39,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:39,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348526790] [2021-07-13 20:37:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:39,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:39,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348526790] [2021-07-13 20:37:39,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348526790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:39,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107025406] [2021-07-13 20:37:39,833 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 [2021-07-13 20:37:39,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:37:39,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:39,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:37:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:40,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,224 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 30 treesize of output 13 [2021-07-13 20:37:40,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:40,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:40,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:37:40,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:40,251 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-13 20:37:40,258 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:40,264 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:40,271 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:40,277 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:40,283 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:37:40,289 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:37:40,296 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:40,302 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:40,307 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:40,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:40,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:40,311 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:40,331 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:37:40,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:37:40,332 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-07-13 20:37:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:40,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107025406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:40,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:40,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:37:40,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767576036] [2021-07-13 20:37:40,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:40,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:40,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:40,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:40,356 INFO L87 Difference]: Start difference. First operand 1983 states and 6800 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) [2021-07-13 20:37:40,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:40,859 INFO L93 Difference]: Finished difference Result 2475 states and 8338 transitions. [2021-07-13 20:37:40,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:37:40,859 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 [2021-07-13 20:37:40,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:40,863 INFO L225 Difference]: With dead ends: 2475 [2021-07-13 20:37:40,863 INFO L226 Difference]: Without dead ends: 2460 [2021-07-13 20:37:40,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 586.2ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:37:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-07-13 20:37:40,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1983. [2021-07-13 20:37:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.43087790110999) internal successors, (6800), 1982 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 6800 transitions. [2021-07-13 20:37:40,890 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 6800 transitions. Word has length 26 [2021-07-13 20:37:40,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:40,890 INFO L482 AbstractCegarLoop]: Abstraction has 1983 states and 6800 transitions. [2021-07-13 20:37:40,890 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) [2021-07-13 20:37:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 6800 transitions. [2021-07-13 20:37:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:40,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:40,893 INFO L508 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] [2021-07-13 20:37:41,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2846 [2021-07-13 20:37:41,094 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:41,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:41,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1240114777, now seen corresponding path program 40 times [2021-07-13 20:37:41,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:41,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260142786] [2021-07-13 20:37:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:41,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:41,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260142786] [2021-07-13 20:37:41,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260142786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:41,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751034086] [2021-07-13 20:37:41,222 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 [2021-07-13 20:37:41,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:41,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:41,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:37:41,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:41,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:41,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:41,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:41,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 13 [2021-07-13 20:37:41,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:41,632 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:37:41,638 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,643 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:41,644 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:41,650 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16 [2021-07-13 20:37:41,655 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:41,661 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-13 20:37:41,667 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-13 20:37:41,673 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:41,678 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:37:41,684 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:41,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:41,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:37:41,687 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:41,708 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:37:41,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:37:41,709 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-07-13 20:37:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:41,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751034086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:41,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:41,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:37:41,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753150248] [2021-07-13 20:37:41,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:41,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:41,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:41,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:41,741 INFO L87 Difference]: Start difference. First operand 1983 states and 6800 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) [2021-07-13 20:37:42,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:42,774 INFO L93 Difference]: Finished difference Result 2790 states and 9280 transitions. [2021-07-13 20:37:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:37:42,775 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 [2021-07-13 20:37:42,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:42,780 INFO L225 Difference]: With dead ends: 2790 [2021-07-13 20:37:42,780 INFO L226 Difference]: Without dead ends: 2760 [2021-07-13 20:37:42,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1050.4ms TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:37:42,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-07-13 20:37:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 1983. [2021-07-13 20:37:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.43087790110999) internal successors, (6800), 1982 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 6800 transitions. [2021-07-13 20:37:42,810 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 6800 transitions. Word has length 26 [2021-07-13 20:37:42,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:42,810 INFO L482 AbstractCegarLoop]: Abstraction has 1983 states and 6800 transitions. [2021-07-13 20:37:42,811 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) [2021-07-13 20:37:42,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 6800 transitions. [2021-07-13 20:37:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:42,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:42,813 INFO L508 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] [2021-07-13 20:37:43,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2888,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:43,014 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:43,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:43,014 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 41 times [2021-07-13 20:37:43,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:43,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866829575] [2021-07-13 20:37:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:43,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:43,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866829575] [2021-07-13 20:37:43,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866829575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:43,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432301043] [2021-07-13 20:37:43,156 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 [2021-07-13 20:37:43,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:37:43,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:43,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:37:43,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:43,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:43,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:43,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:43,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:43,604 INFO L628 ElimStorePlain]: treesize reduction 121, result has 44.0 percent of original size [2021-07-13 20:37:43,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:37:43,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:43,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:43,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:43,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:43,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:43,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:43,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:43,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:43,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:43,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:37:43,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:43,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:43,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:37:43,691 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:248, output treesize:22 [2021-07-13 20:37:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:43,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432301043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:43,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:43,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:37:43,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204401681] [2021-07-13 20:37:43,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:43,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:43,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:43,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:43,730 INFO L87 Difference]: Start difference. First operand 1983 states and 6800 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) [2021-07-13 20:37:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:44,363 INFO L93 Difference]: Finished difference Result 2608 states and 8716 transitions. [2021-07-13 20:37:44,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:37:44,363 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 [2021-07-13 20:37:44,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:44,368 INFO L225 Difference]: With dead ends: 2608 [2021-07-13 20:37:44,368 INFO L226 Difference]: Without dead ends: 2578 [2021-07-13 20:37:44,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 717.3ms TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:37:44,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-07-13 20:37:44,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1986. [2021-07-13 20:37:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 3.433249370277078) internal successors, (6815), 1985 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:44,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 6815 transitions. [2021-07-13 20:37:44,398 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 6815 transitions. Word has length 26 [2021-07-13 20:37:44,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:44,398 INFO L482 AbstractCegarLoop]: Abstraction has 1986 states and 6815 transitions. [2021-07-13 20:37:44,398 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) [2021-07-13 20:37:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 6815 transitions. [2021-07-13 20:37:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:44,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:44,400 INFO L508 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] [2021-07-13 20:37:44,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2932,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:44,601 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:44,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 42 times [2021-07-13 20:37:44,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:44,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933903179] [2021-07-13 20:37:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:44,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:44,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933903179] [2021-07-13 20:37:44,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933903179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:44,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123805499] [2021-07-13 20:37:44,746 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 [2021-07-13 20:37:44,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:37:44,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:44,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:37:44,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:45,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,170 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:45,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-13 20:37:45,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:45,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 24 [2021-07-13 20:37:45,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,300 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-13 20:37:45,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:45,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,314 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:45,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:37:45,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:45,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:37:45,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,432 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-07-13 20:37:45,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:45,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:45,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:37:45,447 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,457 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:45,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 20 [2021-07-13 20:37:45,458 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:45,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:45,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:37:45,568 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:45,578 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:45,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:37:45,579 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:45,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:45,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:45,669 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:309, output treesize:141 [2021-07-13 20:37:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:45,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123805499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:45,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:45,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:37:45,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263858348] [2021-07-13 20:37:45,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:37:45,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:45,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:37:45,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:37:45,806 INFO L87 Difference]: Start difference. First operand 1986 states and 6815 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) [2021-07-13 20:37:46,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:46,370 INFO L93 Difference]: Finished difference Result 2559 states and 8622 transitions. [2021-07-13 20:37:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:37:46,371 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 [2021-07-13 20:37:46,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:46,375 INFO L225 Difference]: With dead ends: 2559 [2021-07-13 20:37:46,376 INFO L226 Difference]: Without dead ends: 2544 [2021-07-13 20:37:46,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 730.5ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:37:46,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-07-13 20:37:46,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2010. [2021-07-13 20:37:46,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 3.4310602289696366) internal successors, (6893), 2009 states have internal predecessors, (6893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:46,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 6893 transitions. [2021-07-13 20:37:46,416 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 6893 transitions. Word has length 26 [2021-07-13 20:37:46,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:46,416 INFO L482 AbstractCegarLoop]: Abstraction has 2010 states and 6893 transitions. [2021-07-13 20:37:46,416 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) [2021-07-13 20:37:46,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 6893 transitions. [2021-07-13 20:37:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:46,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:46,419 INFO L508 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] [2021-07-13 20:37:46,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2946 [2021-07-13 20:37:46,619 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:46,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:46,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 43 times [2021-07-13 20:37:46,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:46,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762294307] [2021-07-13 20:37:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:46,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:46,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762294307] [2021-07-13 20:37:46,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762294307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:46,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255631878] [2021-07-13 20:37:46,849 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 [2021-07-13 20:37:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:46,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:37:46,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:47,246 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-13 20:37:47,467 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-07-13 20:37:47,526 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_313, v_prenex_314], 2=[A, v_prenex_312]} [2021-07-13 20:37:47,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:37:47,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,665 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-07-13 20:37:47,665 INFO L628 ElimStorePlain]: treesize reduction 117, result has 43.8 percent of original size [2021-07-13 20:37:47,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:37:47,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:47,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:47,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:37:47,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:47,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:47,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:37:47,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:37:47,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:47,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:47,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:37:47,755 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:222, output treesize:15 [2021-07-13 20:37:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:47,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255631878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:47,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:47,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:37:47,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688056192] [2021-07-13 20:37:47,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:37:47,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:47,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:37:47,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:37:47,786 INFO L87 Difference]: Start difference. First operand 2010 states and 6893 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) [2021-07-13 20:37:48,605 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-13 20:37:48,815 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2021-07-13 20:37:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:49,011 INFO L93 Difference]: Finished difference Result 2656 states and 8840 transitions. [2021-07-13 20:37:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:37:49,012 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 [2021-07-13 20:37:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:49,016 INFO L225 Difference]: With dead ends: 2656 [2021-07-13 20:37:49,016 INFO L226 Difference]: Without dead ends: 2611 [2021-07-13 20:37:49,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1412.9ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:37:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-07-13 20:37:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 2044. [2021-07-13 20:37:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 2043 states have (on average 3.4322075379344104) internal successors, (7012), 2043 states have internal predecessors, (7012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 7012 transitions. [2021-07-13 20:37:49,044 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 7012 transitions. Word has length 26 [2021-07-13 20:37:49,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:49,044 INFO L482 AbstractCegarLoop]: Abstraction has 2044 states and 7012 transitions. [2021-07-13 20:37:49,044 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) [2021-07-13 20:37:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 7012 transitions. [2021-07-13 20:37:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:49,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:49,047 INFO L508 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] [2021-07-13 20:37:49,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2978,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:49,247 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:49,248 INFO L82 PathProgramCache]: Analyzing trace with hash 585023207, now seen corresponding path program 44 times [2021-07-13 20:37:49,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:49,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544120009] [2021-07-13 20:37:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:49,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:49,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544120009] [2021-07-13 20:37:49,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544120009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:49,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81728205] [2021-07-13 20:37:49,463 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 [2021-07-13 20:37:49,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:37:49,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:49,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:37:49,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:49,885 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-13 20:37:50,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:50,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:50,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:37:50,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:50,458 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 150 [2021-07-13 20:37:50,459 INFO L628 ElimStorePlain]: treesize reduction 139, result has 74.8 percent of original size [2021-07-13 20:37:50,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:50,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:50,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-13 20:37:50,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:50,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:50,504 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:50,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:37:50,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:50,824 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 142 [2021-07-13 20:37:50,824 INFO L628 ElimStorePlain]: treesize reduction 32, result has 91.6 percent of original size [2021-07-13 20:37:50,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:50,848 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:50,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:37:50,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:50,997 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-07-13 20:37:50,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:51,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,022 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:51,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-13 20:37:51,024 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,169 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-07-13 20:37:51,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:51,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,199 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:51,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 28 [2021-07-13 20:37:51,200 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,215 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:37:51,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-07-13 20:37:51,215 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,331 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-13 20:37:51,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:51,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,355 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:51,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:37:51,359 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,472 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-13 20:37:51,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,493 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:51,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:37:51,495 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,601 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:37:51,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:51,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:51,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:51,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:37:51,626 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:51,728 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:37:51,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:51,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:37:51,744 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:563, output treesize:232 [2021-07-13 20:37:51,951 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-07-13 20:37:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:51,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81728205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:51,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:51,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:37:51,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745421602] [2021-07-13 20:37:51,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:37:51,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:51,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:37:51,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:37:51,986 INFO L87 Difference]: Start difference. First operand 2044 states and 7012 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) [2021-07-13 20:37:52,272 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-07-13 20:37:52,688 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-07-13 20:37:52,969 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-13 20:37:53,145 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-07-13 20:37:53,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:53,395 INFO L93 Difference]: Finished difference Result 2980 states and 9896 transitions. [2021-07-13 20:37:53,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:37:53,396 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 [2021-07-13 20:37:53,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:53,401 INFO L225 Difference]: With dead ends: 2980 [2021-07-13 20:37:53,401 INFO L226 Difference]: Without dead ends: 2950 [2021-07-13 20:37:53,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1765.4ms TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:37:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2021-07-13 20:37:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2027. [2021-07-13 20:37:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.428923988153998) internal successors, (6947), 2026 states have internal predecessors, (6947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6947 transitions. [2021-07-13 20:37:53,435 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6947 transitions. Word has length 26 [2021-07-13 20:37:53,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:53,435 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 6947 transitions. [2021-07-13 20:37:53,435 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) [2021-07-13 20:37:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6947 transitions. [2021-07-13 20:37:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:53,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:53,438 INFO L508 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] [2021-07-13 20:37:53,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2992,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:53,639 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:53,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 45 times [2021-07-13 20:37:53,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:53,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985946597] [2021-07-13 20:37:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:53,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:53,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985946597] [2021-07-13 20:37:53,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985946597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:53,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009409951] [2021-07-13 20:37:53,854 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 [2021-07-13 20:37:53,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:37:53,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:53,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:37:53,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:54,254 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-07-13 20:37:54,371 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_343, v_prenex_344, v_prenex_345], 3=[v_prenex_347]} [2021-07-13 20:37:54,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:54,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:54,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 27 [2021-07-13 20:37:54,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:54,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:54,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:54,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:37:54,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:54,744 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-07-13 20:37:54,744 INFO L628 ElimStorePlain]: treesize reduction 21, result has 94.6 percent of original size [2021-07-13 20:37:54,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:54,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:54,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:37:54,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:54,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:54,778 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:54,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:37:54,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:54,933 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-13 20:37:54,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:54,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:54,948 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:54,948 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 21 treesize of output 17 [2021-07-13 20:37:54,949 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:54,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:54,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:54,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:37:54,962 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:55,101 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-13 20:37:55,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:55,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:55,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:55,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:37:55,120 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:55,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:55,131 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:37:55,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20 [2021-07-13 20:37:55,132 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:55,253 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-07-13 20:37:55,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:55,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:55,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:55,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:55,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 20:37:55,270 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:55,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:55,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:55,280 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:37:55,280 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 25 treesize of output 19 [2021-07-13 20:37:55,281 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:55,389 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-13 20:37:55,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:55,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-13 20:37:55,409 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:425, output treesize:180 [2021-07-13 20:37:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:55,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009409951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:55,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:55,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:37:55,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179540703] [2021-07-13 20:37:55,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:37:55,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:55,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:37:55,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:37:55,554 INFO L87 Difference]: Start difference. First operand 2027 states and 6947 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) [2021-07-13 20:37:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:56,290 INFO L93 Difference]: Finished difference Result 2615 states and 8782 transitions. [2021-07-13 20:37:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:37:56,290 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 [2021-07-13 20:37:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:56,294 INFO L225 Difference]: With dead ends: 2615 [2021-07-13 20:37:56,294 INFO L226 Difference]: Without dead ends: 2590 [2021-07-13 20:37:56,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1001.2ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:37:56,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-07-13 20:37:56,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2027. [2021-07-13 20:37:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.430898321816387) internal successors, (6951), 2026 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6951 transitions. [2021-07-13 20:37:56,323 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6951 transitions. Word has length 26 [2021-07-13 20:37:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:56,323 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 6951 transitions. [2021-07-13 20:37:56,323 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) [2021-07-13 20:37:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6951 transitions. [2021-07-13 20:37:56,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:56,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:56,326 INFO L508 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] [2021-07-13 20:37:56,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:37:56,527 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:37:56,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:37:56,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 46 times [2021-07-13 20:37:56,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:37:56,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586168770] [2021-07-13 20:37:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:37:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:37:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:56,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:37:56,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586168770] [2021-07-13 20:37:56,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586168770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:56,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120480230] [2021-07-13 20:37:56,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:37:56,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:37:56,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:37:56,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:37:56,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:37:57,093 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-07-13 20:37:57,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:57,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-13 20:37:57,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,435 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:57,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:37:57,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,812 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2021-07-13 20:37:57,812 INFO L628 ElimStorePlain]: treesize reduction 33, result has 92.4 percent of original size [2021-07-13 20:37:57,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:57,834 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-13 20:37:57,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:57,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:57,861 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:57,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:37:57,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:58,198 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-07-13 20:37:58,199 INFO L628 ElimStorePlain]: treesize reduction 14, result has 96.3 percent of original size [2021-07-13 20:37:58,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:58,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:58,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-13 20:37:58,223 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:58,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:58,242 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:58,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-07-13 20:37:58,243 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:58,560 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-07-13 20:37:58,561 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-07-13 20:37:58,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:58,585 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:58,585 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-13 20:37:58,588 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:58,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:58,609 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:37:58,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:37:58,618 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:58,814 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-13 20:37:58,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:58,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:58,834 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:37:58,834 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-13 20:37:58,836 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:58,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:37:58,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:58,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-13 20:37:58,854 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:37:58,987 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-07-13 20:37:58,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:37:59,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-13 20:37:59,007 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:457, output treesize:247 [2021-07-13 20:37:59,144 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-07-13 20:37:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:37:59,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120480230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:37:59,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:37:59,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:37:59,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000719660] [2021-07-13 20:37:59,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:37:59,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:37:59,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:37:59,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:37:59,182 INFO L87 Difference]: Start difference. First operand 2027 states and 6951 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) [2021-07-13 20:37:59,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:37:59,830 INFO L93 Difference]: Finished difference Result 2605 states and 8786 transitions. [2021-07-13 20:37:59,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:37:59,830 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 [2021-07-13 20:37:59,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:37:59,835 INFO L225 Difference]: With dead ends: 2605 [2021-07-13 20:37:59,835 INFO L226 Difference]: Without dead ends: 2590 [2021-07-13 20:37:59,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 998.5ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:37:59,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-07-13 20:37:59,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2027. [2021-07-13 20:37:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.430898321816387) internal successors, (6951), 2026 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:37:59,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6951 transitions. [2021-07-13 20:37:59,867 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6951 transitions. Word has length 26 [2021-07-13 20:37:59,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:37:59,867 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 6951 transitions. [2021-07-13 20:37:59,867 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) [2021-07-13 20:37:59,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6951 transitions. [2021-07-13 20:37:59,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:37:59,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:37:59,870 INFO L508 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] [2021-07-13 20:38:00,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3072,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:00,072 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:00,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 55 times [2021-07-13 20:38:00,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:00,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997755017] [2021-07-13 20:38:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:00,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:00,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997755017] [2021-07-13 20:38:00,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997755017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:00,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600394823] [2021-07-13 20:38:00,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:00,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:38:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:00,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:00,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,734 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 41 treesize of output 16 [2021-07-13 20:38:00,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:38:00,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:38:00,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:38:00,766 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,775 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 35 treesize of output 19 [2021-07-13 20:38:00,776 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,785 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 16 [2021-07-13 20:38:00,786 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,795 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:00,796 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:38:00,806 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:00,816 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:38:00,826 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:38:00,834 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,841 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 41 treesize of output 13 [2021-07-13 20:38:00,841 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:38:00,848 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:00,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:00,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:38:00,852 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:00,872 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:38:00,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:38:00,874 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-13 20:38:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:00,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600394823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:00,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:00,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:38:00,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105031178] [2021-07-13 20:38:00,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:38:00,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:00,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:38:00,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:38:00,898 INFO L87 Difference]: Start difference. First operand 2027 states and 6951 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) [2021-07-13 20:38:01,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:01,488 INFO L93 Difference]: Finished difference Result 2632 states and 8515 transitions. [2021-07-13 20:38:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:38:01,488 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 [2021-07-13 20:38:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:01,493 INFO L225 Difference]: With dead ends: 2632 [2021-07-13 20:38:01,494 INFO L226 Difference]: Without dead ends: 2595 [2021-07-13 20:38:01,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:38:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2021-07-13 20:38:01,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2051. [2021-07-13 20:38:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.430731707317073) internal successors, (7033), 2050 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:01,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7033 transitions. [2021-07-13 20:38:01,526 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7033 transitions. Word has length 26 [2021-07-13 20:38:01,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:01,526 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 7033 transitions. [2021-07-13 20:38:01,526 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) [2021-07-13 20:38:01,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7033 transitions. [2021-07-13 20:38:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:01,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:01,529 INFO L508 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] [2021-07-13 20:38:01,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3147,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:01,731 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:01,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:01,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 56 times [2021-07-13 20:38:01,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:01,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673738651] [2021-07-13 20:38:01,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:01,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:01,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673738651] [2021-07-13 20:38:01,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673738651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:01,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768697038] [2021-07-13 20:38:01,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:01,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:01,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:01,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:38:01,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:02,210 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_357], 5=[v_prenex_361, v_prenex_359]} [2021-07-13 20:38:02,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:02,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:38:02,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,306 INFO L628 ElimStorePlain]: treesize reduction 133, result has 44.1 percent of original size [2021-07-13 20:38:02,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:02,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,311 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 23 treesize of output 13 [2021-07-13 20:38:02,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:02,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:02,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:38:02,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:02,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:02,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:02,375 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 27 treesize of output 13 [2021-07-13 20:38:02,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:02,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:02,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:38:02,399 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:22 [2021-07-13 20:38:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:02,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768697038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:02,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:02,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:38:02,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827689439] [2021-07-13 20:38:02,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:38:02,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:02,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:38:02,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:38:02,439 INFO L87 Difference]: Start difference. First operand 2051 states and 7033 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) [2021-07-13 20:38:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:03,305 INFO L93 Difference]: Finished difference Result 2527 states and 8437 transitions. [2021-07-13 20:38:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:38:03,306 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 [2021-07-13 20:38:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:03,310 INFO L225 Difference]: With dead ends: 2527 [2021-07-13 20:38:03,310 INFO L226 Difference]: Without dead ends: 2481 [2021-07-13 20:38:03,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 896.9ms TimeCoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:38:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-07-13 20:38:03,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2047. [2021-07-13 20:38:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 3.424731182795699) internal successors, (7007), 2046 states have internal predecessors, (7007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 7007 transitions. [2021-07-13 20:38:03,338 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 7007 transitions. Word has length 26 [2021-07-13 20:38:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:03,338 INFO L482 AbstractCegarLoop]: Abstraction has 2047 states and 7007 transitions. [2021-07-13 20:38:03,338 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) [2021-07-13 20:38:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 7007 transitions. [2021-07-13 20:38:03,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:03,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:03,341 INFO L508 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] [2021-07-13 20:38:03,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3237,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:03,541 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 57 times [2021-07-13 20:38:03,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:03,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848177182] [2021-07-13 20:38:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:03,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:03,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848177182] [2021-07-13 20:38:03,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848177182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:03,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805260500] [2021-07-13 20:38:03,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:03,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:38:03,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:03,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:38:03,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:04,201 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-13 20:38:04,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,503 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:38:04,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-07-13 20:38:04,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,537 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:38:04,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-13 20:38:04,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,907 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-07-13 20:38:04,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:04,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:04,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 20:38:04,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:04,977 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:38:04,977 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 28 treesize of output 26 [2021-07-13 20:38:04,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:05,370 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-13 20:38:05,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:05,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:05,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:05,409 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:38:05,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-13 20:38:05,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:05,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:05,439 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-13 20:38:05,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-13 20:38:05,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:06,055 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 135 [2021-07-13 20:38:06,056 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.5 percent of original size [2021-07-13 20:38:06,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:06,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:06,095 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:38:06,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-07-13 20:38:06,097 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:06,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:06,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:06,121 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:38:06,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-13 20:38:06,123 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:06,413 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-07-13 20:38:06,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:06,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:06,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:06,453 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:38:06,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-07-13 20:38:06,455 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:06,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:06,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:06,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:06,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-13 20:38:06,488 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,017 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 119 [2021-07-13 20:38:07,017 INFO L628 ElimStorePlain]: treesize reduction 28, result has 94.5 percent of original size [2021-07-13 20:38:07,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,048 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:38:07,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-07-13 20:38:07,050 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,077 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:38:07,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-13 20:38:07,081 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,544 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 107 [2021-07-13 20:38:07,545 INFO L628 ElimStorePlain]: treesize reduction 26, result has 94.1 percent of original size [2021-07-13 20:38:07,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,577 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:38:07,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-07-13 20:38:07,580 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,602 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:38:07,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-13 20:38:07,604 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,814 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:38:07,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:07,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,845 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-13 20:38:07,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-07-13 20:38:07,847 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:07,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:07,875 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:38:07,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:38:07,880 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:08,224 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2021-07-13 20:38:08,224 INFO L628 ElimStorePlain]: treesize reduction 24, result has 92.8 percent of original size [2021-07-13 20:38:08,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-13 20:38:08,240 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:721, output treesize:301 [2021-07-13 20:38:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:08,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805260500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:08,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:08,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:38:08,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780180300] [2021-07-13 20:38:08,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:38:08,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:08,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:38:08,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:38:08,390 INFO L87 Difference]: Start difference. First operand 2047 states and 7007 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) [2021-07-13 20:38:09,459 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-13 20:38:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:09,645 INFO L93 Difference]: Finished difference Result 2628 states and 8841 transitions. [2021-07-13 20:38:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:38:09,645 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 [2021-07-13 20:38:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:09,650 INFO L225 Difference]: With dead ends: 2628 [2021-07-13 20:38:09,650 INFO L226 Difference]: Without dead ends: 2613 [2021-07-13 20:38:09,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1391.7ms TimeCoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:38:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-07-13 20:38:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2062. [2021-07-13 20:38:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 3.430373605046094) internal successors, (7070), 2061 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 7070 transitions. [2021-07-13 20:38:09,678 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 7070 transitions. Word has length 26 [2021-07-13 20:38:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:09,678 INFO L482 AbstractCegarLoop]: Abstraction has 2062 states and 7070 transitions. [2021-07-13 20:38:09,679 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) [2021-07-13 20:38:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 7070 transitions. [2021-07-13 20:38:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:09,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:09,681 INFO L508 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] [2021-07-13 20:38:09,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3251 [2021-07-13 20:38:09,882 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:09,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:09,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 47 times [2021-07-13 20:38:09,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:09,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224241157] [2021-07-13 20:38:09,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:10,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:10,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224241157] [2021-07-13 20:38:10,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224241157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:10,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654758026] [2021-07-13 20:38:10,153 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 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 [2021-07-13 20:38:10,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:38:10,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:10,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:38:10,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:10,580 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-13 20:38:10,774 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:38:11,102 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 50 [2021-07-13 20:38:11,138 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_390, v_prenex_391]} [2021-07-13 20:38:11,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:38:11,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,243 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-07-13 20:38:11,244 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-07-13 20:38:11,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:11,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:38:11,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:11,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:11,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:11,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:11,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:11,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:38:11,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:11,352 INFO L628 ElimStorePlain]: treesize reduction 13, result has 79.4 percent of original size [2021-07-13 20:38:11,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:38:11,354 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-07-13 20:38:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:11,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654758026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:11,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:11,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:38:11,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143023073] [2021-07-13 20:38:11,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:38:11,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:11,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:38:11,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:11,397 INFO L87 Difference]: Start difference. First operand 2062 states and 7070 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) [2021-07-13 20:38:12,054 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-13 20:38:12,546 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 119 [2021-07-13 20:38:13,105 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2021-07-13 20:38:13,616 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 86 [2021-07-13 20:38:14,046 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 125 [2021-07-13 20:38:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:14,338 INFO L93 Difference]: Finished difference Result 2678 states and 8891 transitions. [2021-07-13 20:38:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:38:14,338 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 [2021-07-13 20:38:14,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:14,343 INFO L225 Difference]: With dead ends: 2678 [2021-07-13 20:38:14,343 INFO L226 Difference]: Without dead ends: 2648 [2021-07-13 20:38:14,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 3204.4ms TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:38:14,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-07-13 20:38:14,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2073. [2021-07-13 20:38:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 3.4305019305019306) internal successors, (7108), 2072 states have internal predecessors, (7108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 7108 transitions. [2021-07-13 20:38:14,371 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 7108 transitions. Word has length 26 [2021-07-13 20:38:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:14,371 INFO L482 AbstractCegarLoop]: Abstraction has 2073 states and 7108 transitions. [2021-07-13 20:38:14,371 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) [2021-07-13 20:38:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 7108 transitions. [2021-07-13 20:38:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:14,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:14,374 INFO L508 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] [2021-07-13 20:38:14,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3316 [2021-07-13 20:38:14,574 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:14,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:14,574 INFO L82 PathProgramCache]: Analyzing trace with hash 352643691, now seen corresponding path program 58 times [2021-07-13 20:38:14,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:14,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871729636] [2021-07-13 20:38:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:14,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:14,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871729636] [2021-07-13 20:38:14,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871729636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:14,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249724562] [2021-07-13 20:38:14,723 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:14,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:14,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:14,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:38:14,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:15,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,255 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 28 treesize of output 13 [2021-07-13 20:38:15,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:38:15,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:15,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,276 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:38:15,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:15,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:15,293 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:38:15,301 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:38:15,308 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:38:15,316 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:38:15,324 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:38:15,331 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:38:15,338 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:38:15,346 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:15,353 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:15,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:15,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:38:15,360 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:15,380 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:38:15,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:38:15,381 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-13 20:38:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:15,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249724562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:15,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:15,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 20:38:15,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834937570] [2021-07-13 20:38:15,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:15,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:15,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:15,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:15,405 INFO L87 Difference]: Start difference. First operand 2073 states and 7108 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) [2021-07-13 20:38:16,385 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-07-13 20:38:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:16,698 INFO L93 Difference]: Finished difference Result 3338 states and 10716 transitions. [2021-07-13 20:38:16,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:38:16,698 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 [2021-07-13 20:38:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:16,704 INFO L225 Difference]: With dead ends: 3338 [2021-07-13 20:38:16,705 INFO L226 Difference]: Without dead ends: 3295 [2021-07-13 20:38:16,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1144.8ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:38:16,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2021-07-13 20:38:16,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 2202. [2021-07-13 20:38:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 3.452975920036347) internal successors, (7600), 2201 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 7600 transitions. [2021-07-13 20:38:16,754 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 7600 transitions. Word has length 26 [2021-07-13 20:38:16,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:16,754 INFO L482 AbstractCegarLoop]: Abstraction has 2202 states and 7600 transitions. [2021-07-13 20:38:16,754 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) [2021-07-13 20:38:16,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 7600 transitions. [2021-07-13 20:38:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:16,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:16,757 INFO L508 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] [2021-07-13 20:38:16,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3331 [2021-07-13 20:38:16,958 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:16,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:16,958 INFO L82 PathProgramCache]: Analyzing trace with hash 392132503, now seen corresponding path program 48 times [2021-07-13 20:38:16,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:16,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922843795] [2021-07-13 20:38:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:17,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:17,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922843795] [2021-07-13 20:38:17,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922843795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:17,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337770719] [2021-07-13 20:38:17,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:17,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:38:17,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:17,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:38:17,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:17,719 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-07-13 20:38:18,117 INFO L446 ElimStorePlain]: Different costs {28=[v_prenex_418], 45=[A]} [2021-07-13 20:38:18,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:18,148 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:38:18,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 33 [2021-07-13 20:38:18,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:18,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:18,182 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:38:18,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-07-13 20:38:18,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:18,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:18,219 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:38:18,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 49 treesize of output 37 [2021-07-13 20:38:18,236 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:18,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:18,259 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-07-13 20:38:18,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 25 [2021-07-13 20:38:18,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:18,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:18,278 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-07-13 20:38:18,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 22 [2021-07-13 20:38:18,280 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:18,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:18,303 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:38:18,303 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 38 treesize of output 30 [2021-07-13 20:38:18,305 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:18,665 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 115 [2021-07-13 20:38:18,666 INFO L628 ElimStorePlain]: treesize reduction 162, result has 71.7 percent of original size [2021-07-13 20:38:18,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:18,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:18,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 36 [2021-07-13 20:38:18,689 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:18,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:18,713 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:38:18,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 29 [2021-07-13 20:38:18,715 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:18,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:18,739 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:38:18,739 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 27 treesize of output 31 [2021-07-13 20:38:18,743 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:18,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:18,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:18,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 36 [2021-07-13 20:38:18,768 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:18,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:18,795 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:38:18,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-07-13 20:38:18,797 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:18,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:18,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:18,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 32 [2021-07-13 20:38:18,837 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:19,020 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-13 20:38:19,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:19,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 2 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-13 20:38:19,039 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 16 variables, input treesize:801, output treesize:513 [2021-07-13 20:38:19,222 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-07-13 20:38:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:19,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337770719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:19,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:19,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:38:19,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862964723] [2021-07-13 20:38:19,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:38:19,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:19,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:38:19,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:38:19,332 INFO L87 Difference]: Start difference. First operand 2202 states and 7600 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) [2021-07-13 20:38:20,072 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-07-13 20:38:20,478 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2021-07-13 20:38:20,970 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-07-13 20:38:21,247 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2021-07-13 20:38:21,689 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-07-13 20:38:22,326 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-07-13 20:38:23,118 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-07-13 20:38:23,343 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-07-13 20:38:23,667 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-07-13 20:38:23,982 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-07-13 20:38:24,160 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-07-13 20:38:24,678 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2021-07-13 20:38:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:25,002 INFO L93 Difference]: Finished difference Result 3312 states and 10745 transitions. [2021-07-13 20:38:25,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:38:25,002 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 [2021-07-13 20:38:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:25,008 INFO L225 Difference]: With dead ends: 3312 [2021-07-13 20:38:25,008 INFO L226 Difference]: Without dead ends: 3267 [2021-07-13 20:38:25,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 5478.2ms TimeCoverageRelationStatistics Valid=404, Invalid=2046, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:38:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2021-07-13 20:38:25,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 2225. [2021-07-13 20:38:25,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2224 states have (on average 3.459982014388489) internal successors, (7695), 2224 states have internal predecessors, (7695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 7695 transitions. [2021-07-13 20:38:25,042 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 7695 transitions. Word has length 26 [2021-07-13 20:38:25,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:25,042 INFO L482 AbstractCegarLoop]: Abstraction has 2225 states and 7695 transitions. [2021-07-13 20:38:25,042 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) [2021-07-13 20:38:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 7695 transitions. [2021-07-13 20:38:25,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:25,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:25,045 INFO L508 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] [2021-07-13 20:38:25,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3421,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:25,245 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:25,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:25,246 INFO L82 PathProgramCache]: Analyzing trace with hash -658448197, now seen corresponding path program 49 times [2021-07-13 20:38:25,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:25,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249173170] [2021-07-13 20:38:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:25,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:25,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249173170] [2021-07-13 20:38:25,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249173170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:25,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041599945] [2021-07-13 20:38:25,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:25,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:38:25,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:25,784 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-07-13 20:38:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:25,879 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:25,879 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 28 treesize of output 20 [2021-07-13 20:38:25,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:25,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:25,892 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:25,892 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 28 treesize of output 16 [2021-07-13 20:38:25,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:26,215 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 122 [2021-07-13 20:38:26,216 INFO L628 ElimStorePlain]: treesize reduction 71, result has 83.9 percent of original size [2021-07-13 20:38:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:26,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:26,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 24 [2021-07-13 20:38:26,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:26,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:26,246 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:26,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-07-13 20:38:26,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:26,376 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-13 20:38:26,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:26,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:26,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:26,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:38:26,392 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:26,519 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-13 20:38:26,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:26,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:26,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:26,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:38:26,535 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:26,674 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-07-13 20:38:26,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:26,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:26,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:26,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:38:26,691 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:26,805 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-07-13 20:38:26,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:26,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:26,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:26,820 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 30 treesize of output 24 [2021-07-13 20:38:26,824 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:26,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:26,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:26,835 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 30 treesize of output 24 [2021-07-13 20:38:26,838 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:27,017 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-07-13 20:38:27,017 INFO L628 ElimStorePlain]: treesize reduction 18, result has 92.1 percent of original size [2021-07-13 20:38:27,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:27,029 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:27,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:38:27,030 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:27,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:27,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:27,123 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:27,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:38:27,124 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:27,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:27,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:38:27,209 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:150 [2021-07-13 20:38:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:27,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041599945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:27,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:27,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:38:27,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956160554] [2021-07-13 20:38:27,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:27,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:27,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:27,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:27,332 INFO L87 Difference]: Start difference. First operand 2225 states and 7695 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) [2021-07-13 20:38:28,301 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-13 20:38:28,429 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-07-13 20:38:28,621 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-07-13 20:38:28,772 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-07-13 20:38:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:29,138 INFO L93 Difference]: Finished difference Result 3319 states and 10983 transitions. [2021-07-13 20:38:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:38:29,138 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 [2021-07-13 20:38:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:29,145 INFO L225 Difference]: With dead ends: 3319 [2021-07-13 20:38:29,145 INFO L226 Difference]: Without dead ends: 3289 [2021-07-13 20:38:29,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1810.4ms TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:38:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2021-07-13 20:38:29,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 2211. [2021-07-13 20:38:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 3.4547511312217196) internal successors, (7635), 2210 states have internal predecessors, (7635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 7635 transitions. [2021-07-13 20:38:29,182 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 7635 transitions. Word has length 26 [2021-07-13 20:38:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:29,182 INFO L482 AbstractCegarLoop]: Abstraction has 2211 states and 7635 transitions. [2021-07-13 20:38:29,182 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) [2021-07-13 20:38:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 7635 transitions. [2021-07-13 20:38:29,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:29,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:29,185 INFO L508 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] [2021-07-13 20:38:29,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3452 [2021-07-13 20:38:29,385 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:29,386 INFO L82 PathProgramCache]: Analyzing trace with hash 578637215, now seen corresponding path program 59 times [2021-07-13 20:38:29,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:29,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746860109] [2021-07-13 20:38:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:29,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:29,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746860109] [2021-07-13 20:38:29,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746860109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:29,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065010282] [2021-07-13 20:38:29,532 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 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 [2021-07-13 20:38:29,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:38:29,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:29,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:38:29,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:30,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:38:30,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,070 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 39 treesize of output 19 [2021-07-13 20:38:30,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:30,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,086 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-13 20:38:30,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:38:30,095 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:38:30,105 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:38:30,117 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-13 20:38:30,129 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-13 20:38:30,142 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,153 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 35 treesize of output 19 [2021-07-13 20:38:30,154 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:38:30,165 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:38:30,176 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:30,187 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:30,197 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:30,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:30,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:38:30,203 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:30,230 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:38:30,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:38:30,232 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-13 20:38:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:30,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065010282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:30,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:30,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:38:30,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406082138] [2021-07-13 20:38:30,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:30,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:30,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:30,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:30,261 INFO L87 Difference]: Start difference. First operand 2211 states and 7635 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) [2021-07-13 20:38:31,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:31,325 INFO L93 Difference]: Finished difference Result 3809 states and 12432 transitions. [2021-07-13 20:38:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:38:31,326 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 [2021-07-13 20:38:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:31,333 INFO L225 Difference]: With dead ends: 3809 [2021-07-13 20:38:31,333 INFO L226 Difference]: Without dead ends: 3779 [2021-07-13 20:38:31,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 955.4ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:38:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2021-07-13 20:38:31,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 2344. [2021-07-13 20:38:31,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.458386683738796) internal successors, (8103), 2343 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 8103 transitions. [2021-07-13 20:38:31,373 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 8103 transitions. Word has length 26 [2021-07-13 20:38:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:31,373 INFO L482 AbstractCegarLoop]: Abstraction has 2344 states and 8103 transitions. [2021-07-13 20:38:31,373 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) [2021-07-13 20:38:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 8103 transitions. [2021-07-13 20:38:31,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:31,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:31,376 INFO L508 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] [2021-07-13 20:38:31,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3480,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:31,576 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:31,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 60 times [2021-07-13 20:38:31,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:31,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331545608] [2021-07-13 20:38:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:31,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:31,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331545608] [2021-07-13 20:38:31,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331545608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:31,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858875232] [2021-07-13 20:38:31,753 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 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 [2021-07-13 20:38:31,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:38:31,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:38:31,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:31,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,021 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:38:32,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-07-13 20:38:32,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,053 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-13 20:38:32,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-13 20:38:32,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,082 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-07-13 20:38:32,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 26 [2021-07-13 20:38:32,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,100 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:38:32,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:38:32,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,128 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-07-13 20:38:32,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-13 20:38:32,132 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,158 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-07-13 20:38:32,158 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 41 treesize of output 29 [2021-07-13 20:38:32,160 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,186 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-13 20:38:32,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 25 [2021-07-13 20:38:32,187 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,205 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:38:32,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:38:32,206 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,227 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:38:32,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:38:32,228 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,256 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-07-13 20:38:32,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 26 [2021-07-13 20:38:32,258 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,286 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-07-13 20:38:32,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 30 [2021-07-13 20:38:32,288 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,306 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:38:32,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:38:32,306 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,324 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:38:32,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-13 20:38:32,325 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:32,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-13 20:38:32,358 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,384 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-07-13 20:38:32,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-13 20:38:32,385 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:32,395 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-07-13 20:38:32,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:38:32,396 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:32,483 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.9 percent of original size [2021-07-13 20:38:32,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:38:32,484 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:705, output treesize:78 [2021-07-13 20:38:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:32,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858875232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:32,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:32,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 20:38:32,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228653626] [2021-07-13 20:38:32,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:32,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:32,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:32,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:32,580 INFO L87 Difference]: Start difference. First operand 2344 states and 8103 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) [2021-07-13 20:38:33,946 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-07-13 20:38:34,134 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-07-13 20:38:34,591 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-07-13 20:38:34,825 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-07-13 20:38:35,405 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-07-13 20:38:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:35,555 INFO L93 Difference]: Finished difference Result 4305 states and 13885 transitions. [2021-07-13 20:38:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:38:35,555 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 [2021-07-13 20:38:35,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:35,564 INFO L225 Difference]: With dead ends: 4305 [2021-07-13 20:38:35,564 INFO L226 Difference]: Without dead ends: 4252 [2021-07-13 20:38:35,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2682.7ms TimeCoverageRelationStatistics Valid=556, Invalid=2096, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:38:35,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2021-07-13 20:38:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 2347. [2021-07-13 20:38:35,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 3.4578005115089514) internal successors, (8112), 2346 states have internal predecessors, (8112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:35,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 8112 transitions. [2021-07-13 20:38:35,628 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 8112 transitions. Word has length 26 [2021-07-13 20:38:35,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:35,628 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 8112 transitions. [2021-07-13 20:38:35,628 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) [2021-07-13 20:38:35,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 8112 transitions. [2021-07-13 20:38:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:35,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:35,632 INFO L508 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] [2021-07-13 20:38:35,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3570 [2021-07-13 20:38:35,833 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:35,833 INFO L82 PathProgramCache]: Analyzing trace with hash 534773347, now seen corresponding path program 50 times [2021-07-13 20:38:35,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:35,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813238111] [2021-07-13 20:38:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:36,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:36,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813238111] [2021-07-13 20:38:36,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813238111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:36,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929507047] [2021-07-13 20:38:36,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:36,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:36,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:36,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:38:36,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:36,444 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:38:36,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:36,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:36,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:36,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:36,758 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-13 20:38:36,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-07-13 20:38:36,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:36,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:36,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:36,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:36,776 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-07-13 20:38:36,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:36,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:37,260 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 124 [2021-07-13 20:38:37,260 INFO L628 ElimStorePlain]: treesize reduction 296, result has 58.8 percent of original size [2021-07-13 20:38:37,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:37,285 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-13 20:38:37,285 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 21 treesize of output 21 [2021-07-13 20:38:37,287 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:37,469 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-13 20:38:37,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:37,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:37,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:37,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:37,502 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:38:37,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-13 20:38:37,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:37,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:37,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:37,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:37,529 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-13 20:38:37,531 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:37,853 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2021-07-13 20:38:37,854 INFO L628 ElimStorePlain]: treesize reduction 27, result has 93.0 percent of original size [2021-07-13 20:38:37,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:37,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:37,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:37,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:37,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:37,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-07-13 20:38:37,885 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:37,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:37,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:37,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:37,901 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-07-13 20:38:37,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:38:37,902 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:38,037 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-07-13 20:38:38,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:38,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:38,063 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-13 20:38:38,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:38:38,065 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:38,202 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-13 20:38:38,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:38,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:38,231 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:38:38,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 27 [2021-07-13 20:38:38,235 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:38,365 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-13 20:38:38,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:38,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:38,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:38,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-07-13 20:38:38,386 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:38,513 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-07-13 20:38:38,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:38,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:38,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:38,537 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-13 20:38:38,537 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-13 20:38:38,541 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:38,657 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-13 20:38:38,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:38,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:38:38,666 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:785, output treesize:295 [2021-07-13 20:38:38,902 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-07-13 20:38:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:39,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929507047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:39,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:39,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:38:39,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863586428] [2021-07-13 20:38:39,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:38:39,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:39,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:38:39,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:38:39,067 INFO L87 Difference]: Start difference. First operand 2347 states and 8112 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) [2021-07-13 20:38:39,736 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-13 20:38:40,035 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-07-13 20:38:40,161 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-07-13 20:38:40,350 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-07-13 20:38:40,629 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:38:40,762 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-07-13 20:38:41,107 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-13 20:38:41,498 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-07-13 20:38:41,728 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-07-13 20:38:42,160 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-07-13 20:38:42,428 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-07-13 20:38:42,624 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-13 20:38:43,079 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-07-13 20:38:43,486 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 27 [2021-07-13 20:38:43,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:43,589 INFO L93 Difference]: Finished difference Result 3241 states and 10733 transitions. [2021-07-13 20:38:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:38:43,589 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 [2021-07-13 20:38:43,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:43,595 INFO L225 Difference]: With dead ends: 3241 [2021-07-13 20:38:43,595 INFO L226 Difference]: Without dead ends: 3211 [2021-07-13 20:38:43,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 4359.6ms TimeCoverageRelationStatistics Valid=353, Invalid=2197, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:38:43,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-07-13 20:38:43,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2360. [2021-07-13 20:38:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 3.454429843153879) internal successors, (8149), 2359 states have internal predecessors, (8149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 8149 transitions. [2021-07-13 20:38:43,630 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 8149 transitions. Word has length 26 [2021-07-13 20:38:43,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:43,630 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 8149 transitions. [2021-07-13 20:38:43,630 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) [2021-07-13 20:38:43,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 8149 transitions. [2021-07-13 20:38:43,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:43,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:43,633 INFO L508 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] [2021-07-13 20:38:43,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3600,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:43,834 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:43,835 INFO L82 PathProgramCache]: Analyzing trace with hash -849869469, now seen corresponding path program 51 times [2021-07-13 20:38:43,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:43,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524810300] [2021-07-13 20:38:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:44,101 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-07-13 20:38:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:44,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:44,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524810300] [2021-07-13 20:38:44,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524810300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:44,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059843929] [2021-07-13 20:38:44,222 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 [2021-07-13 20:38:44,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:38:44,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:44,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:38:44,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:44,741 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:38:44,971 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-13 20:38:45,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,094 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:45,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:38:45,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,496 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 123 [2021-07-13 20:38:45,497 INFO L628 ElimStorePlain]: treesize reduction 130, result has 76.2 percent of original size [2021-07-13 20:38:45,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,511 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:45,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:38:45,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,678 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-13 20:38:45,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:45,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:45,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:38:45,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:45,854 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:38:45,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:45,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:45,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:45,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:38:45,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:46,026 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-07-13 20:38:46,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:46,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:46,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:46,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:38:46,044 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:46,194 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-07-13 20:38:46,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:46,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:46,207 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:46,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:38:46,209 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:46,353 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-13 20:38:46,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:46,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:46,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:46,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:38:46,370 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:46,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:46,380 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:38:46,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-07-13 20:38:46,381 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:46,498 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:38:46,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:46,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:46,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:46,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 24 [2021-07-13 20:38:46,516 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:46,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:46,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:46,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:38:46,530 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:46,715 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-07-13 20:38:46,715 INFO L628 ElimStorePlain]: treesize reduction 23, result has 90.6 percent of original size [2021-07-13 20:38:46,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:38:46,723 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:156 [2021-07-13 20:38:46,902 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-07-13 20:38:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:46,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059843929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:46,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:46,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:38:46,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120182950] [2021-07-13 20:38:46,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:38:46,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:46,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:38:46,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:46,946 INFO L87 Difference]: Start difference. First operand 2360 states and 8149 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) [2021-07-13 20:38:47,865 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-07-13 20:38:48,200 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-07-13 20:38:48,431 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-07-13 20:38:48,707 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2021-07-13 20:38:49,110 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-13 20:38:49,725 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2021-07-13 20:38:50,180 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-07-13 20:38:50,597 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 123 [2021-07-13 20:38:50,816 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-07-13 20:38:51,351 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 108 [2021-07-13 20:38:51,785 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 127 [2021-07-13 20:38:52,035 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-07-13 20:38:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:52,365 INFO L93 Difference]: Finished difference Result 3613 states and 11812 transitions. [2021-07-13 20:38:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:38:52,365 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 [2021-07-13 20:38:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:52,372 INFO L225 Difference]: With dead ends: 3613 [2021-07-13 20:38:52,372 INFO L226 Difference]: Without dead ends: 3568 [2021-07-13 20:38:52,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 5447.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1712, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:38:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2021-07-13 20:38:52,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 2356. [2021-07-13 20:38:52,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 3.456900212314225) internal successors, (8141), 2355 states have internal predecessors, (8141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8141 transitions. [2021-07-13 20:38:52,413 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8141 transitions. Word has length 26 [2021-07-13 20:38:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:52,413 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 8141 transitions. [2021-07-13 20:38:52,413 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) [2021-07-13 20:38:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8141 transitions. [2021-07-13 20:38:52,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:52,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:52,417 INFO L508 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] [2021-07-13 20:38:52,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3641,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:52,621 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:52,621 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 52 times [2021-07-13 20:38:52,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:52,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364157795] [2021-07-13 20:38:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:52,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:52,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364157795] [2021-07-13 20:38:52,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364157795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:52,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500396527] [2021-07-13 20:38:52,992 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 [2021-07-13 20:38:53,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:38:53,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:53,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:38:53,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:53,326 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-07-13 20:38:53,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:53,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:53,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 27 [2021-07-13 20:38:53,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:53,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:53,500 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:53,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-07-13 20:38:53,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:53,850 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2021-07-13 20:38:53,850 INFO L628 ElimStorePlain]: treesize reduction 17, result has 95.4 percent of original size [2021-07-13 20:38:53,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:53,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:53,866 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 26 treesize of output 24 [2021-07-13 20:38:53,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:53,880 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:53,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:38:53,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:54,032 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-13 20:38:54,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:54,046 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:54,047 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 21 treesize of output 17 [2021-07-13 20:38:54,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:54,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:54,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:54,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:38:54,062 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:54,200 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-13 20:38:54,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:54,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:54,217 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:54,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:38:54,219 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:54,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:54,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:54,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:38:54,240 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:54,402 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-07-13 20:38:54,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:54,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:54,421 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:38:54,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 20 [2021-07-13 20:38:54,422 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:54,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:54,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:54,436 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 30 treesize of output 24 [2021-07-13 20:38:54,440 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:54,579 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-07-13 20:38:54,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:54,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-13 20:38:54,587 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:407, output treesize:170 [2021-07-13 20:38:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:54,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500396527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:54,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:54,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:38:54,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399060410] [2021-07-13 20:38:54,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:54,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:54,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:54,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:54,738 INFO L87 Difference]: Start difference. First operand 2356 states and 8141 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) [2021-07-13 20:38:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:55,936 INFO L93 Difference]: Finished difference Result 3106 states and 10468 transitions. [2021-07-13 20:38:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:38:55,937 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 [2021-07-13 20:38:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:55,943 INFO L225 Difference]: With dead ends: 3106 [2021-07-13 20:38:55,943 INFO L226 Difference]: Without dead ends: 3081 [2021-07-13 20:38:55,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1443.9ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:38:55,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2021-07-13 20:38:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 2358. [2021-07-13 20:38:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2357 states have (on average 3.4560882477725925) internal successors, (8146), 2357 states have internal predecessors, (8146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 8146 transitions. [2021-07-13 20:38:55,979 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 8146 transitions. Word has length 26 [2021-07-13 20:38:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:55,979 INFO L482 AbstractCegarLoop]: Abstraction has 2358 states and 8146 transitions. [2021-07-13 20:38:55,979 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) [2021-07-13 20:38:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 8146 transitions. [2021-07-13 20:38:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:55,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:55,983 INFO L508 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] [2021-07-13 20:38:56,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3671 [2021-07-13 20:38:56,183 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:56,183 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 61 times [2021-07-13 20:38:56,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:56,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746086433] [2021-07-13 20:38:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:56,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:56,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746086433] [2021-07-13 20:38:56,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746086433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:56,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213793766] [2021-07-13 20:38:56,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:56,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:38:56,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:56,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,871 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 30 treesize of output 16 [2021-07-13 20:38:56,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:56,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,880 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 39 treesize of output 16 [2021-07-13 20:38:56,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:56,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,890 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 28 treesize of output 13 [2021-07-13 20:38:56,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:56,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,900 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 37 treesize of output 19 [2021-07-13 20:38:56,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:56,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-13 20:38:56,910 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:56,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,917 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 41 treesize of output 16 [2021-07-13 20:38:56,918 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:56,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:56,926 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:56,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-13 20:38:56,933 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:56,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:38:56,958 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:56,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,965 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-13 20:38:56,966 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:56,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,973 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:38:56,973 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:56,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-13 20:38:56,981 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:56,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,987 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-13 20:38:56,988 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:56,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:38:56,995 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:56,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:56,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:57,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-13 20:38:57,010 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:57,030 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-07-13 20:38:57,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:38:57,031 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-13 20:38:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:57,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213793766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:57,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:57,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:38:57,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94270034] [2021-07-13 20:38:57,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:38:57,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:57,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:38:57,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:38:57,055 INFO L87 Difference]: Start difference. First operand 2358 states and 8146 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) [2021-07-13 20:38:58,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:38:58,398 INFO L93 Difference]: Finished difference Result 3316 states and 11054 transitions. [2021-07-13 20:38:58,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:38:58,398 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 [2021-07-13 20:38:58,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:38:58,404 INFO L225 Difference]: With dead ends: 3316 [2021-07-13 20:38:58,404 INFO L226 Difference]: Without dead ends: 3273 [2021-07-13 20:38:58,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1217.6ms TimeCoverageRelationStatistics Valid=415, Invalid=1477, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:38:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-07-13 20:38:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2398. [2021-07-13 20:38:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 3.4568210262828534) internal successors, (8286), 2397 states have internal predecessors, (8286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:38:58,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 8286 transitions. [2021-07-13 20:38:58,445 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 8286 transitions. Word has length 26 [2021-07-13 20:38:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:38:58,445 INFO L482 AbstractCegarLoop]: Abstraction has 2398 states and 8286 transitions. [2021-07-13 20:38:58,445 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) [2021-07-13 20:38:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 8286 transitions. [2021-07-13 20:38:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:38:58,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:38:58,448 INFO L508 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] [2021-07-13 20:38:58,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-07-13 20:38:58,649 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:38:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:38:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 62 times [2021-07-13 20:38:58,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:38:58,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805753172] [2021-07-13 20:38:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:38:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:38:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:58,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:38:58,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805753172] [2021-07-13 20:38:58,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805753172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:58,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774471005] [2021-07-13 20:38:58,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:38:58,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:38:58,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:38:58,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:38:58,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:38:59,209 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-07-13 20:38:59,284 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_497], 5=[v_prenex_493, v_prenex_495]} [2021-07-13 20:38:59,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,300 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 28 treesize of output 13 [2021-07-13 20:38:59,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:38:59,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,439 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-07-13 20:38:59,439 INFO L628 ElimStorePlain]: treesize reduction 147, result has 42.1 percent of original size [2021-07-13 20:38:59,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-07-13 20:38:59,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:59,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:38:59,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:59,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:38:59,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:38:59,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:38:59,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:38:59,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:38:59,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:38:59,570 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:307, output treesize:32 [2021-07-13 20:38:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:38:59,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774471005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:38:59,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:38:59,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-13 20:38:59,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69884433] [2021-07-13 20:38:59,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:38:59,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:38:59,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:38:59,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:38:59,622 INFO L87 Difference]: Start difference. First operand 2398 states and 8286 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) [2021-07-13 20:39:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:01,335 INFO L93 Difference]: Finished difference Result 3303 states and 11080 transitions. [2021-07-13 20:39:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:39:01,335 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 [2021-07-13 20:39:01,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:01,341 INFO L225 Difference]: With dead ends: 3303 [2021-07-13 20:39:01,341 INFO L226 Difference]: Without dead ends: 3269 [2021-07-13 20:39:01,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1586.1ms TimeCoverageRelationStatistics Valid=478, Invalid=1592, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:39:01,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3269 states. [2021-07-13 20:39:01,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3269 to 2372. [2021-07-13 20:39:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 3.4571910586250527) internal successors, (8197), 2371 states have internal predecessors, (8197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 8197 transitions. [2021-07-13 20:39:01,376 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 8197 transitions. Word has length 26 [2021-07-13 20:39:01,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:01,376 INFO L482 AbstractCegarLoop]: Abstraction has 2372 states and 8197 transitions. [2021-07-13 20:39:01,376 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) [2021-07-13 20:39:01,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 8197 transitions. [2021-07-13 20:39:01,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:01,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:01,380 INFO L508 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] [2021-07-13 20:39:01,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:01,580 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:01,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1804783987, now seen corresponding path program 53 times [2021-07-13 20:39:01,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:01,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524352985] [2021-07-13 20:39:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:01,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:01,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524352985] [2021-07-13 20:39:01,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524352985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:01,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070337962] [2021-07-13 20:39:01,880 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 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 [2021-07-13 20:39:01,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:39:01,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:01,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:39:01,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:02,342 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-13 20:39:02,633 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 66 [2021-07-13 20:39:02,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,777 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 30 treesize of output 16 [2021-07-13 20:39:02,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,783 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 16 [2021-07-13 20:39:02,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,873 INFO L628 ElimStorePlain]: treesize reduction 69, result has 56.3 percent of original size [2021-07-13 20:39:02,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-13 20:39:02,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:02,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:02,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:39:02,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-13 20:39:02,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:02,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:02,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:39:02,973 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:201, output treesize:32 [2021-07-13 20:39:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:03,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070337962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:03,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:03,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:39:03,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231785854] [2021-07-13 20:39:03,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:03,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:03,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:03,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:03,023 INFO L87 Difference]: Start difference. First operand 2372 states and 8197 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) [2021-07-13 20:39:04,071 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-13 20:39:04,748 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 108 [2021-07-13 20:39:04,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:04,929 INFO L93 Difference]: Finished difference Result 3196 states and 10649 transitions. [2021-07-13 20:39:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:39:04,929 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 [2021-07-13 20:39:04,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:04,934 INFO L225 Difference]: With dead ends: 3196 [2021-07-13 20:39:04,934 INFO L226 Difference]: Without dead ends: 3151 [2021-07-13 20:39:04,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2175.1ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:39:04,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-07-13 20:39:04,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2383. [2021-07-13 20:39:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2383 states, 2382 states have (on average 3.4554995801847186) internal successors, (8231), 2382 states have internal predecessors, (8231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2383 states to 2383 states and 8231 transitions. [2021-07-13 20:39:04,968 INFO L78 Accepts]: Start accepts. Automaton has 2383 states and 8231 transitions. Word has length 26 [2021-07-13 20:39:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:04,968 INFO L482 AbstractCegarLoop]: Abstraction has 2383 states and 8231 transitions. [2021-07-13 20:39:04,968 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) [2021-07-13 20:39:04,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2383 states and 8231 transitions. [2021-07-13 20:39:04,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:04,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:04,971 INFO L508 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] [2021-07-13 20:39:05,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3812 [2021-07-13 20:39:05,172 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:05,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:05,172 INFO L82 PathProgramCache]: Analyzing trace with hash 676615347, now seen corresponding path program 54 times [2021-07-13 20:39:05,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:05,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400731817] [2021-07-13 20:39:05,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:05,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:05,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400731817] [2021-07-13 20:39:05,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400731817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:05,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822929275] [2021-07-13 20:39:05,419 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 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 [2021-07-13 20:39:05,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:39:05,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:05,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:39:05,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:05,941 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-07-13 20:39:06,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:06,042 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-07-13 20:39:06,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-07-13 20:39:06,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:06,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:06,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:06,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 36 [2021-07-13 20:39:06,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:06,500 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 102 [2021-07-13 20:39:06,500 INFO L628 ElimStorePlain]: treesize reduction 32, result has 94.4 percent of original size [2021-07-13 20:39:06,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:06,525 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-07-13 20:39:06,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 30 [2021-07-13 20:39:06,527 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:06,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:06,550 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-07-13 20:39:06,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 34 [2021-07-13 20:39:06,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:06,743 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-13 20:39:06,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:06,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:06,767 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-07-13 20:39:06,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:39:06,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:06,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:06,792 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-07-13 20:39:06,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 38 [2021-07-13 20:39:06,793 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:06,981 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-07-13 20:39:06,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:06,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:07,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:07,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 38 [2021-07-13 20:39:07,007 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:07,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:07,030 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-07-13 20:39:07,030 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 34 [2021-07-13 20:39:07,033 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:07,392 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2021-07-13 20:39:07,393 INFO L628 ElimStorePlain]: treesize reduction 19, result has 95.7 percent of original size [2021-07-13 20:39:07,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:07,419 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-07-13 20:39:07,420 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 42 treesize of output 36 [2021-07-13 20:39:07,424 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:07,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:07,443 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-07-13 20:39:07,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 32 [2021-07-13 20:39:07,445 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:07,601 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-13 20:39:07,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:07,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-13 20:39:07,612 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:613, output treesize:428 [2021-07-13 20:39:07,773 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-07-13 20:39:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:07,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822929275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:07,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:07,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-13 20:39:07,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610715217] [2021-07-13 20:39:07,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:39:07,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:07,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:39:07,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:07,954 INFO L87 Difference]: Start difference. First operand 2383 states and 8231 transitions. Second operand has 20 states, 20 states have (on average 2.45) 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) [2021-07-13 20:39:09,228 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2021-07-13 20:39:09,743 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-07-13 20:39:10,227 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-07-13 20:39:10,426 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-07-13 20:39:10,610 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 23 [2021-07-13 20:39:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:10,817 INFO L93 Difference]: Finished difference Result 3199 states and 10757 transitions. [2021-07-13 20:39:10,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:39:10,817 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) 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 [2021-07-13 20:39:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:10,822 INFO L225 Difference]: With dead ends: 3199 [2021-07-13 20:39:10,823 INFO L226 Difference]: Without dead ends: 3174 [2021-07-13 20:39:10,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2694.7ms TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:39:10,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-07-13 20:39:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 2376. [2021-07-13 20:39:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 3.4530526315789474) internal successors, (8201), 2375 states have internal predecessors, (8201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 8201 transitions. [2021-07-13 20:39:10,854 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 8201 transitions. Word has length 26 [2021-07-13 20:39:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:10,854 INFO L482 AbstractCegarLoop]: Abstraction has 2376 states and 8201 transitions. [2021-07-13 20:39:10,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) 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) [2021-07-13 20:39:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 8201 transitions. [2021-07-13 20:39:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:10,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:10,857 INFO L508 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] [2021-07-13 20:39:11,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3829,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:11,059 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:11,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:11,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1700400349, now seen corresponding path program 55 times [2021-07-13 20:39:11,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:11,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738123615] [2021-07-13 20:39:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:11,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:11,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738123615] [2021-07-13 20:39:11,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738123615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:11,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582068791] [2021-07-13 20:39:11,290 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 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 [2021-07-13 20:39:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:11,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:39:11,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:11,771 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-13 20:39:11,850 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_536, A, v_prenex_538, v_prenex_539, v_prenex_543, v_prenex_533, v_prenex_535], 3=[v_prenex_541]} [2021-07-13 20:39:11,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,866 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:11,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:11,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:11,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:11,884 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:11,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:39:11,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,233 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 126 [2021-07-13 20:39:12,233 INFO L628 ElimStorePlain]: treesize reduction 71, result has 84.0 percent of original size [2021-07-13 20:39:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,248 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:12,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:39:12,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,415 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-13 20:39:12,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:12,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:12,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-13 20:39:12,435 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,448 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:12,448 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 30 treesize of output 1 [2021-07-13 20:39:12,449 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,571 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-13 20:39:12,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:12,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:12,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-13 20:39:12,591 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:12,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 24 [2021-07-13 20:39:12,606 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,817 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2021-07-13 20:39:12,817 INFO L628 ElimStorePlain]: treesize reduction 18, result has 93.2 percent of original size [2021-07-13 20:39:12,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,830 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:12,830 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 21 treesize of output 17 [2021-07-13 20:39:12,831 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:12,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:12,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:12,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:12,936 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 28 treesize of output 24 [2021-07-13 20:39:12,940 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:13,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:13,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:39:13,037 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:13,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:13,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:13,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-13 20:39:13,133 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:13,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:13,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 20:39:13,215 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:507, output treesize:154 [2021-07-13 20:39:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:13,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582068791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:13,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:13,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:39:13,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867165195] [2021-07-13 20:39:13,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:13,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:13,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:13,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:13,346 INFO L87 Difference]: Start difference. First operand 2376 states and 8201 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) [2021-07-13 20:39:14,278 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-13 20:39:14,485 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-07-13 20:39:14,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:14,830 INFO L93 Difference]: Finished difference Result 3405 states and 11394 transitions. [2021-07-13 20:39:14,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:39:14,831 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 [2021-07-13 20:39:14,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:14,837 INFO L225 Difference]: With dead ends: 3405 [2021-07-13 20:39:14,837 INFO L226 Difference]: Without dead ends: 3375 [2021-07-13 20:39:14,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1608.5ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:39:14,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2021-07-13 20:39:14,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2353. [2021-07-13 20:39:14,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2353 states, 2352 states have (on average 3.453231292517007) internal successors, (8122), 2352 states have internal predecessors, (8122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 8122 transitions. [2021-07-13 20:39:14,871 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 8122 transitions. Word has length 26 [2021-07-13 20:39:14,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:14,871 INFO L482 AbstractCegarLoop]: Abstraction has 2353 states and 8122 transitions. [2021-07-13 20:39:14,871 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) [2021-07-13 20:39:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 8122 transitions. [2021-07-13 20:39:14,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:14,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:14,874 INFO L508 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] [2021-07-13 20:39:15,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3864,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:15,074 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:15,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1133811217, now seen corresponding path program 56 times [2021-07-13 20:39:15,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:15,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593697516] [2021-07-13 20:39:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:15,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:15,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593697516] [2021-07-13 20:39:15,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593697516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:15,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244971389] [2021-07-13 20:39:15,319 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 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 [2021-07-13 20:39:15,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:15,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:15,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:39:15,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:15,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,561 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:15,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:39:15,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:15,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-13 20:39:15,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,584 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:15,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:15,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:15,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:39:15,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:15,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-13 20:39:15,615 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,627 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:15,627 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 35 treesize of output 23 [2021-07-13 20:39:15,628 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,636 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:15,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-13 20:39:15,637 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,646 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:15,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-13 20:39:15,647 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,657 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:15,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-07-13 20:39:15,658 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,669 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:15,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 23 [2021-07-13 20:39:15,670 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,682 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:15,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-13 20:39:15,683 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,693 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:15,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 1 [2021-07-13 20:39:15,693 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,703 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:15,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:39:15,703 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,711 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:15,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:15,712 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,720 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-13 20:39:15,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:39:15,721 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:15,729 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:39:15,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-13 20:39:15,730 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:15,817 INFO L628 ElimStorePlain]: treesize reduction 16, result has 85.6 percent of original size [2021-07-13 20:39:15,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:39:15,819 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:95 [2021-07-13 20:39:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:15,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244971389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:15,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:15,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:39:15,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714053735] [2021-07-13 20:39:15,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:39:15,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:15,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:39:15,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:15,921 INFO L87 Difference]: Start difference. First operand 2353 states and 8122 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) [2021-07-13 20:39:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:16,846 INFO L93 Difference]: Finished difference Result 3078 states and 10413 transitions. [2021-07-13 20:39:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:39:16,846 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 [2021-07-13 20:39:16,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:16,852 INFO L225 Difference]: With dead ends: 3078 [2021-07-13 20:39:16,852 INFO L226 Difference]: Without dead ends: 3063 [2021-07-13 20:39:16,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 947.7ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:39:16,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3063 states. [2021-07-13 20:39:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3063 to 2355. [2021-07-13 20:39:16,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.45624468988955) internal successors, (8136), 2354 states have internal predecessors, (8136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:16,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 8136 transitions. [2021-07-13 20:39:16,886 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 8136 transitions. Word has length 26 [2021-07-13 20:39:16,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:16,886 INFO L482 AbstractCegarLoop]: Abstraction has 2355 states and 8136 transitions. [2021-07-13 20:39:16,886 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) [2021-07-13 20:39:16,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 8136 transitions. [2021-07-13 20:39:16,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:39:16,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:16,889 INFO L508 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] [2021-07-13 20:39:17,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3894 [2021-07-13 20:39:17,090 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:17,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:17,090 INFO L82 PathProgramCache]: Analyzing trace with hash 118535907, now seen corresponding path program 63 times [2021-07-13 20:39:17,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:17,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597514376] [2021-07-13 20:39:17,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:17,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:17,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597514376] [2021-07-13 20:39:17,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597514376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:17,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203731589] [2021-07-13 20:39:17,261 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 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 [2021-07-13 20:39:17,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:39:17,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:17,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:39:17,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:17,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,763 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-13 20:39:17,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-07-13 20:39:17,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:17,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-07-13 20:39:17,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:39:17,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-13 20:39:17,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,853 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:39:17,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:39:17,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,881 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-13 20:39:17,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 28 [2021-07-13 20:39:17,882 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,899 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:17,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-13 20:39:17,900 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,928 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-13 20:39:17,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-13 20:39:17,932 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,949 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:17,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-13 20:39:17,950 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,967 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:17,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-13 20:39:17,967 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,984 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:17,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-13 20:39:17,984 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:17,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:17,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,000 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:18,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-07-13 20:39:18,001 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,026 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-13 20:39:18,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-07-13 20:39:18,028 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,044 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:18,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 [2021-07-13 20:39:18,045 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,069 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-13 20:39:18,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-07-13 20:39:18,071 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,086 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:18,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-13 20:39:18,086 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:39:18,096 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:39:18,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-07-13 20:39:18,096 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 20:39:18,194 INFO L628 ElimStorePlain]: treesize reduction 92, result has 50.3 percent of original size [2021-07-13 20:39:18,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:39:18,196 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-07-13 20:39:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:18,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203731589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:18,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:18,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-13 20:39:18,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795773624] [2021-07-13 20:39:18,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:39:18,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:18,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:39:18,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:18,278 INFO L87 Difference]: Start difference. First operand 2355 states and 8136 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) [2021-07-13 20:39:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:20,784 INFO L93 Difference]: Finished difference Result 3597 states and 11910 transitions. [2021-07-13 20:39:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:39:20,784 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 [2021-07-13 20:39:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:20,790 INFO L225 Difference]: With dead ends: 3597 [2021-07-13 20:39:20,790 INFO L226 Difference]: Without dead ends: 3553 [2021-07-13 20:39:20,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2207.6ms TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:39:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-07-13 20:39:20,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2397. [2021-07-13 20:39:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 2396 states have (on average 3.451585976627713) internal successors, (8270), 2396 states have internal predecessors, (8270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 8270 transitions. [2021-07-13 20:39:20,832 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 8270 transitions. Word has length 26 [2021-07-13 20:39:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:20,832 INFO L482 AbstractCegarLoop]: Abstraction has 2397 states and 8270 transitions. [2021-07-13 20:39:20,832 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) [2021-07-13 20:39:20,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 8270 transitions. [2021-07-13 20:39:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:20,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:20,836 INFO L508 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] [2021-07-13 20:39:21,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3915 [2021-07-13 20:39:21,037 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:21,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:21,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1407294025, now seen corresponding path program 57 times [2021-07-13 20:39:21,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:21,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364282482] [2021-07-13 20:39:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:21,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:21,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364282482] [2021-07-13 20:39:21,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364282482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:21,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795232011] [2021-07-13 20:39:21,081 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 [2021-07-13 20:39:21,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:39:21,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:21,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:21,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:21,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795232011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:21,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:21,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:39:21,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781525602] [2021-07-13 20:39:21,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:39:21,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:21,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:39:21,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:39:21,228 INFO L87 Difference]: Start difference. First operand 2397 states and 8270 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) [2021-07-13 20:39:22,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:22,207 INFO L93 Difference]: Finished difference Result 5478 states and 17219 transitions. [2021-07-13 20:39:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:39:22,207 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 [2021-07-13 20:39:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:22,217 INFO L225 Difference]: With dead ends: 5478 [2021-07-13 20:39:22,218 INFO L226 Difference]: Without dead ends: 5478 [2021-07-13 20:39:22,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 581.2ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:39:22,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-07-13 20:39:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 2593. [2021-07-13 20:39:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2592 states have (on average 3.493827160493827) internal successors, (9056), 2592 states have internal predecessors, (9056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:22,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 9056 transitions. [2021-07-13 20:39:22,276 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 9056 transitions. Word has length 28 [2021-07-13 20:39:22,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:22,276 INFO L482 AbstractCegarLoop]: Abstraction has 2593 states and 9056 transitions. [2021-07-13 20:39:22,276 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) [2021-07-13 20:39:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 9056 transitions. [2021-07-13 20:39:22,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:22,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:22,280 INFO L508 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] [2021-07-13 20:39:22,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4016,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:22,481 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:22,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:22,481 INFO L82 PathProgramCache]: Analyzing trace with hash 430975181, now seen corresponding path program 58 times [2021-07-13 20:39:22,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:22,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139742796] [2021-07-13 20:39:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:22,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:22,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139742796] [2021-07-13 20:39:22,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139742796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:22,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364270301] [2021-07-13 20:39:22,525 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 [2021-07-13 20:39:22,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:22,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:22,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:22,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:22,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364270301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:22,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:22,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:39:22,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719307426] [2021-07-13 20:39:22,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:39:22,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:22,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:39:22,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:39:22,663 INFO L87 Difference]: Start difference. First operand 2593 states and 9056 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) [2021-07-13 20:39:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:23,952 INFO L93 Difference]: Finished difference Result 7165 states and 22139 transitions. [2021-07-13 20:39:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:39:23,952 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 [2021-07-13 20:39:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:23,966 INFO L225 Difference]: With dead ends: 7165 [2021-07-13 20:39:23,966 INFO L226 Difference]: Without dead ends: 7165 [2021-07-13 20:39:23,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 782.2ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:39:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2021-07-13 20:39:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 2604. [2021-07-13 20:39:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2603 states have (on average 3.4998079139454474) internal successors, (9110), 2603 states have internal predecessors, (9110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:24,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 9110 transitions. [2021-07-13 20:39:24,042 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 9110 transitions. Word has length 28 [2021-07-13 20:39:24,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:24,042 INFO L482 AbstractCegarLoop]: Abstraction has 2604 states and 9110 transitions. [2021-07-13 20:39:24,042 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) [2021-07-13 20:39:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 9110 transitions. [2021-07-13 20:39:24,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:24,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:24,046 INFO L508 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] [2021-07-13 20:39:24,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:24,246 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:24,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:24,246 INFO L82 PathProgramCache]: Analyzing trace with hash 997927261, now seen corresponding path program 59 times [2021-07-13 20:39:24,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:24,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198647775] [2021-07-13 20:39:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:24,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:24,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198647775] [2021-07-13 20:39:24,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198647775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:24,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480627210] [2021-07-13 20:39:24,293 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 [2021-07-13 20:39:24,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:39:24,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:24,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:24,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:24,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480627210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:24,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:24,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:39:24,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874159358] [2021-07-13 20:39:24,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:39:24,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:24,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:39:24,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:39:24,436 INFO L87 Difference]: Start difference. First operand 2604 states and 9110 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) [2021-07-13 20:39:25,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:25,712 INFO L93 Difference]: Finished difference Result 6563 states and 20685 transitions. [2021-07-13 20:39:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:39:25,712 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 [2021-07-13 20:39:25,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:25,726 INFO L225 Difference]: With dead ends: 6563 [2021-07-13 20:39:25,726 INFO L226 Difference]: Without dead ends: 6563 [2021-07-13 20:39:25,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 754.7ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:39:25,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6563 states. [2021-07-13 20:39:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6563 to 2552. [2021-07-13 20:39:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 3.480203841630733) internal successors, (8878), 2551 states have internal predecessors, (8878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 8878 transitions. [2021-07-13 20:39:25,792 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 8878 transitions. Word has length 28 [2021-07-13 20:39:25,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:25,792 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 8878 transitions. [2021-07-13 20:39:25,792 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) [2021-07-13 20:39:25,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 8878 transitions. [2021-07-13 20:39:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:25,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:25,796 INFO L508 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] [2021-07-13 20:39:25,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4018,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:25,996 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:25,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2115011713, now seen corresponding path program 60 times [2021-07-13 20:39:25,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:25,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722194718] [2021-07-13 20:39:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:26,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:26,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722194718] [2021-07-13 20:39:26,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722194718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:26,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234252892] [2021-07-13 20:39:26,061 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 [2021-07-13 20:39:26,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:39:26,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:26,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:26,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:26,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234252892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:26,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:26,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:39:26,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809467321] [2021-07-13 20:39:26,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:39:26,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:26,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:39:26,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:39:26,202 INFO L87 Difference]: Start difference. First operand 2552 states and 8878 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) [2021-07-13 20:39:27,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:27,353 INFO L93 Difference]: Finished difference Result 5564 states and 17386 transitions. [2021-07-13 20:39:27,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:39:27,354 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 [2021-07-13 20:39:27,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:27,365 INFO L225 Difference]: With dead ends: 5564 [2021-07-13 20:39:27,365 INFO L226 Difference]: Without dead ends: 5564 [2021-07-13 20:39:27,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 680.8ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:39:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-07-13 20:39:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 2570. [2021-07-13 20:39:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2569 states have (on average 3.474114441416894) internal successors, (8925), 2569 states have internal predecessors, (8925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 8925 transitions. [2021-07-13 20:39:27,431 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 8925 transitions. Word has length 28 [2021-07-13 20:39:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:27,431 INFO L482 AbstractCegarLoop]: Abstraction has 2570 states and 8925 transitions. [2021-07-13 20:39:27,431 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) [2021-07-13 20:39:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 8925 transitions. [2021-07-13 20:39:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:27,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:27,435 INFO L508 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] [2021-07-13 20:39:27,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:27,635 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:27,636 INFO L82 PathProgramCache]: Analyzing trace with hash 970325317, now seen corresponding path program 64 times [2021-07-13 20:39:27,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:27,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698300673] [2021-07-13 20:39:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:27,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:27,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698300673] [2021-07-13 20:39:27,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698300673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:27,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717014854] [2021-07-13 20:39:27,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:39:27,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:27,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:27,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:27,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:27,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717014854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:27,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:27,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:39:27,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580782123] [2021-07-13 20:39:27,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:39:27,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:27,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:39:27,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:39:27,793 INFO L87 Difference]: Start difference. First operand 2570 states and 8925 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) [2021-07-13 20:39:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:28,382 INFO L93 Difference]: Finished difference Result 4970 states and 15740 transitions. [2021-07-13 20:39:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:39:28,382 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 [2021-07-13 20:39:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:28,391 INFO L225 Difference]: With dead ends: 4970 [2021-07-13 20:39:28,391 INFO L226 Difference]: Without dead ends: 4970 [2021-07-13 20:39:28,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:39:28,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4970 states. [2021-07-13 20:39:28,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4970 to 2640. [2021-07-13 20:39:28,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 3.4588859416445623) internal successors, (9128), 2639 states have internal predecessors, (9128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 9128 transitions. [2021-07-13 20:39:28,444 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 9128 transitions. Word has length 28 [2021-07-13 20:39:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:28,444 INFO L482 AbstractCegarLoop]: Abstraction has 2640 states and 9128 transitions. [2021-07-13 20:39:28,444 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) [2021-07-13 20:39:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 9128 transitions. [2021-07-13 20:39:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:28,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:28,449 INFO L508 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] [2021-07-13 20:39:28,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-07-13 20:39:28,672 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:28,672 INFO L82 PathProgramCache]: Analyzing trace with hash 828956685, now seen corresponding path program 61 times [2021-07-13 20:39:28,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:28,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219007372] [2021-07-13 20:39:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:39:28,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:28,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219007372] [2021-07-13 20:39:28,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219007372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:28,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747271486] [2021-07-13 20:39:28,702 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 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 [2021-07-13 20:39:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:39:28,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:39:28,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747271486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:28,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:28,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:39:28,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933380044] [2021-07-13 20:39:28,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:39:28,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:28,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:39:28,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:39:28,787 INFO L87 Difference]: Start difference. First operand 2640 states and 9128 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) [2021-07-13 20:39:28,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:28,972 INFO L93 Difference]: Finished difference Result 4201 states and 13809 transitions. [2021-07-13 20:39:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:39:28,973 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 [2021-07-13 20:39:28,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:28,981 INFO L225 Difference]: With dead ends: 4201 [2021-07-13 20:39:28,981 INFO L226 Difference]: Without dead ends: 4150 [2021-07-13 20:39:28,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:39:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-07-13 20:39:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 2983. [2021-07-13 20:39:29,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2982 states have (on average 3.5087189805499666) internal successors, (10463), 2982 states have internal predecessors, (10463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 10463 transitions. [2021-07-13 20:39:29,033 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 10463 transitions. Word has length 28 [2021-07-13 20:39:29,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:29,033 INFO L482 AbstractCegarLoop]: Abstraction has 2983 states and 10463 transitions. [2021-07-13 20:39:29,033 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) [2021-07-13 20:39:29,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 10463 transitions. [2021-07-13 20:39:29,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:29,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:29,038 INFO L508 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] [2021-07-13 20:39:29,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-07-13 20:39:29,250 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:29,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:29,250 INFO L82 PathProgramCache]: Analyzing trace with hash 391987977, now seen corresponding path program 62 times [2021-07-13 20:39:29,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:29,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321683728] [2021-07-13 20:39:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:29,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:29,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321683728] [2021-07-13 20:39:29,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321683728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:29,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151695987] [2021-07-13 20:39:29,292 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 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 [2021-07-13 20:39:29,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:29,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:29,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:39:29,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:29,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151695987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:29,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:29,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:39:29,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707875736] [2021-07-13 20:39:29,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:39:29,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:29,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:39:29,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:39:29,416 INFO L87 Difference]: Start difference. First operand 2983 states and 10463 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) [2021-07-13 20:39:30,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:30,055 INFO L93 Difference]: Finished difference Result 4805 states and 15497 transitions. [2021-07-13 20:39:30,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:39:30,055 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 [2021-07-13 20:39:30,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:30,064 INFO L225 Difference]: With dead ends: 4805 [2021-07-13 20:39:30,064 INFO L226 Difference]: Without dead ends: 4758 [2021-07-13 20:39:30,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 364.8ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:39:30,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4758 states. [2021-07-13 20:39:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4758 to 3157. [2021-07-13 20:39:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 3.5218631178707223) internal successors, (11115), 3156 states have internal predecessors, (11115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 11115 transitions. [2021-07-13 20:39:30,125 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 11115 transitions. Word has length 28 [2021-07-13 20:39:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:30,125 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 11115 transitions. [2021-07-13 20:39:30,125 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) [2021-07-13 20:39:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 11115 transitions. [2021-07-13 20:39:30,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:30,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:30,130 INFO L508 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] [2021-07-13 20:39:30,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-07-13 20:39:30,330 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:30,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:30,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1928077453, now seen corresponding path program 63 times [2021-07-13 20:39:30,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:30,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253629354] [2021-07-13 20:39:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:30,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:30,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253629354] [2021-07-13 20:39:30,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253629354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:30,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690751666] [2021-07-13 20:39:30,368 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 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 [2021-07-13 20:39:30,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:39:30,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:30,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:39:30,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:30,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690751666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:30,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:30,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:39:30,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611346863] [2021-07-13 20:39:30,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:39:30,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:30,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:39:30,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:39:30,489 INFO L87 Difference]: Start difference. First operand 3157 states and 11115 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) [2021-07-13 20:39:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:31,203 INFO L93 Difference]: Finished difference Result 5122 states and 16201 transitions. [2021-07-13 20:39:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:39:31,204 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 [2021-07-13 20:39:31,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:31,213 INFO L225 Difference]: With dead ends: 5122 [2021-07-13 20:39:31,213 INFO L226 Difference]: Without dead ends: 5096 [2021-07-13 20:39:31,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 452.5ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:39:31,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5096 states. [2021-07-13 20:39:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5096 to 3181. [2021-07-13 20:39:31,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3181 states, 3180 states have (on average 3.5276729559748428) internal successors, (11218), 3180 states have internal predecessors, (11218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:31,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 11218 transitions. [2021-07-13 20:39:31,280 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 11218 transitions. Word has length 28 [2021-07-13 20:39:31,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:31,280 INFO L482 AbstractCegarLoop]: Abstraction has 3181 states and 11218 transitions. [2021-07-13 20:39:31,280 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) [2021-07-13 20:39:31,281 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 11218 transitions. [2021-07-13 20:39:31,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:31,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:31,285 INFO L508 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] [2021-07-13 20:39:31,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-07-13 20:39:31,486 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:31,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:31,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1694477061, now seen corresponding path program 64 times [2021-07-13 20:39:31,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:31,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609427105] [2021-07-13 20:39:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:31,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:31,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609427105] [2021-07-13 20:39:31,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609427105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:31,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873551344] [2021-07-13 20:39:31,521 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 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 [2021-07-13 20:39:31,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:31,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:31,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:39:31,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:31,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873551344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:31,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:31,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:39:31,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290095205] [2021-07-13 20:39:31,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:39:31,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:31,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:39:31,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:39:31,645 INFO L87 Difference]: Start difference. First operand 3181 states and 11218 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) [2021-07-13 20:39:32,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:32,371 INFO L93 Difference]: Finished difference Result 5123 states and 16231 transitions. [2021-07-13 20:39:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:39:32,372 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 [2021-07-13 20:39:32,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:32,382 INFO L225 Difference]: With dead ends: 5123 [2021-07-13 20:39:32,382 INFO L226 Difference]: Without dead ends: 5117 [2021-07-13 20:39:32,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 452.3ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:39:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-07-13 20:39:32,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 3184. [2021-07-13 20:39:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3184 states, 3183 states have (on average 3.522148916116871) internal successors, (11211), 3183 states have internal predecessors, (11211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 11211 transitions. [2021-07-13 20:39:32,447 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 11211 transitions. Word has length 28 [2021-07-13 20:39:32,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:32,447 INFO L482 AbstractCegarLoop]: Abstraction has 3184 states and 11211 transitions. [2021-07-13 20:39:32,447 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) [2021-07-13 20:39:32,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 11211 transitions. [2021-07-13 20:39:32,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:32,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:32,452 INFO L508 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] [2021-07-13 20:39:32,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-07-13 20:39:32,669 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:32,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:32,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1551691313, now seen corresponding path program 65 times [2021-07-13 20:39:32,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:32,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105770311] [2021-07-13 20:39:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:32,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:32,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105770311] [2021-07-13 20:39:32,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105770311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:32,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169547351] [2021-07-13 20:39:32,702 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 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 [2021-07-13 20:39:32,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:39:32,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:32,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:39:32,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:32,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169547351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:32,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:32,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:39:32,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415672791] [2021-07-13 20:39:32,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:39:32,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:32,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:39:32,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:39:32,797 INFO L87 Difference]: Start difference. First operand 3184 states and 11211 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) [2021-07-13 20:39:33,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:33,362 INFO L93 Difference]: Finished difference Result 5875 states and 18946 transitions. [2021-07-13 20:39:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:39:33,362 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 [2021-07-13 20:39:33,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:33,399 INFO L225 Difference]: With dead ends: 5875 [2021-07-13 20:39:33,399 INFO L226 Difference]: Without dead ends: 5792 [2021-07-13 20:39:33,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:39:33,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5792 states. [2021-07-13 20:39:33,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5792 to 3343. [2021-07-13 20:39:33,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3343 states, 3342 states have (on average 3.5556552962298027) internal successors, (11883), 3342 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3343 states to 3343 states and 11883 transitions. [2021-07-13 20:39:33,473 INFO L78 Accepts]: Start accepts. Automaton has 3343 states and 11883 transitions. Word has length 28 [2021-07-13 20:39:33,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:33,473 INFO L482 AbstractCegarLoop]: Abstraction has 3343 states and 11883 transitions. [2021-07-13 20:39:33,473 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) [2021-07-13 20:39:33,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3343 states and 11883 transitions. [2021-07-13 20:39:33,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:33,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:33,480 INFO L508 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] [2021-07-13 20:39:33,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:33,680 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:33,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:33,681 INFO L82 PathProgramCache]: Analyzing trace with hash -659497231, now seen corresponding path program 66 times [2021-07-13 20:39:33,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:33,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493224618] [2021-07-13 20:39:33,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:39:33,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:33,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493224618] [2021-07-13 20:39:33,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493224618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:33,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723997966] [2021-07-13 20:39:33,705 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 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 [2021-07-13 20:39:33,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:39:33,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:33,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:39:33,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:39:33,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723997966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:33,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:33,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:39:33,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45494882] [2021-07-13 20:39:33,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:39:33,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:33,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:39:33,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:39:33,790 INFO L87 Difference]: Start difference. First operand 3343 states and 11883 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) [2021-07-13 20:39:33,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:33,954 INFO L93 Difference]: Finished difference Result 4624 states and 15329 transitions. [2021-07-13 20:39:33,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:39:33,954 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 [2021-07-13 20:39:33,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:33,962 INFO L225 Difference]: With dead ends: 4624 [2021-07-13 20:39:33,963 INFO L226 Difference]: Without dead ends: 4624 [2021-07-13 20:39:33,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:39:33,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4624 states. [2021-07-13 20:39:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4624 to 3098. [2021-07-13 20:39:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3098 states, 3097 states have (on average 3.5298676138198255) internal successors, (10932), 3097 states have internal predecessors, (10932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3098 states to 3098 states and 10932 transitions. [2021-07-13 20:39:34,020 INFO L78 Accepts]: Start accepts. Automaton has 3098 states and 10932 transitions. Word has length 28 [2021-07-13 20:39:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:34,020 INFO L482 AbstractCegarLoop]: Abstraction has 3098 states and 10932 transitions. [2021-07-13 20:39:34,020 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) [2021-07-13 20:39:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3098 states and 10932 transitions. [2021-07-13 20:39:34,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:34,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:34,025 INFO L508 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] [2021-07-13 20:39:34,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:34,226 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:34,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:34,226 INFO L82 PathProgramCache]: Analyzing trace with hash -2006178797, now seen corresponding path program 67 times [2021-07-13 20:39:34,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:34,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671613205] [2021-07-13 20:39:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:34,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:34,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671613205] [2021-07-13 20:39:34,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671613205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:34,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891547170] [2021-07-13 20:39:34,272 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 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 [2021-07-13 20:39:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:34,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:34,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:34,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891547170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:34,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:34,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:39:34,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498609486] [2021-07-13 20:39:34,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:39:34,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:34,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:39:34,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:39:34,371 INFO L87 Difference]: Start difference. First operand 3098 states and 10932 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) [2021-07-13 20:39:35,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:35,069 INFO L93 Difference]: Finished difference Result 6516 states and 20731 transitions. [2021-07-13 20:39:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:39:35,069 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 [2021-07-13 20:39:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:35,080 INFO L225 Difference]: With dead ends: 6516 [2021-07-13 20:39:35,081 INFO L226 Difference]: Without dead ends: 6516 [2021-07-13 20:39:35,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 415.1ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:39:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6516 states. [2021-07-13 20:39:35,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6516 to 3116. [2021-07-13 20:39:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3116 states, 3115 states have (on average 3.5296950240770464) internal successors, (10995), 3115 states have internal predecessors, (10995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3116 states to 3116 states and 10995 transitions. [2021-07-13 20:39:35,152 INFO L78 Accepts]: Start accepts. Automaton has 3116 states and 10995 transitions. Word has length 28 [2021-07-13 20:39:35,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:35,152 INFO L482 AbstractCegarLoop]: Abstraction has 3116 states and 10995 transitions. [2021-07-13 20:39:35,152 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) [2021-07-13 20:39:35,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3116 states and 10995 transitions. [2021-07-13 20:39:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:35,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:35,156 INFO L508 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] [2021-07-13 20:39:35,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4027,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:35,357 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:35,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:35,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1221264703, now seen corresponding path program 68 times [2021-07-13 20:39:35,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:35,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139566684] [2021-07-13 20:39:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:35,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:35,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139566684] [2021-07-13 20:39:35,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139566684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:35,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199095792] [2021-07-13 20:39:35,406 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 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 [2021-07-13 20:39:35,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:35,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:35,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:35,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:35,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199095792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:35,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:35,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:39:35,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831780185] [2021-07-13 20:39:35,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:39:35,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:39:35,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:39:35,521 INFO L87 Difference]: Start difference. First operand 3116 states and 10995 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) [2021-07-13 20:39:36,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:36,295 INFO L93 Difference]: Finished difference Result 6771 states and 21511 transitions. [2021-07-13 20:39:36,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:39:36,296 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 [2021-07-13 20:39:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:36,308 INFO L225 Difference]: With dead ends: 6771 [2021-07-13 20:39:36,309 INFO L226 Difference]: Without dead ends: 6771 [2021-07-13 20:39:36,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:39:36,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6771 states. [2021-07-13 20:39:36,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6771 to 3210. [2021-07-13 20:39:36,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 3209 states have (on average 3.5219694608912433) internal successors, (11302), 3209 states have internal predecessors, (11302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 11302 transitions. [2021-07-13 20:39:36,385 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 11302 transitions. Word has length 28 [2021-07-13 20:39:36,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:36,385 INFO L482 AbstractCegarLoop]: Abstraction has 3210 states and 11302 transitions. [2021-07-13 20:39:36,385 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) [2021-07-13 20:39:36,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 11302 transitions. [2021-07-13 20:39:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:36,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:36,390 INFO L508 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] [2021-07-13 20:39:36,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4028 [2021-07-13 20:39:36,590 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:36,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1990679937, now seen corresponding path program 69 times [2021-07-13 20:39:36,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:36,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774369446] [2021-07-13 20:39:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:36,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:36,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774369446] [2021-07-13 20:39:36,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774369446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:36,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963105737] [2021-07-13 20:39:36,646 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 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 [2021-07-13 20:39:36,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:39:36,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:36,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:39:36,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:36,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963105737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:36,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:36,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:39:36,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982280457] [2021-07-13 20:39:36,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:39:36,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:36,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:39:36,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:39:36,743 INFO L87 Difference]: Start difference. First operand 3210 states and 11302 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) [2021-07-13 20:39:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:37,373 INFO L93 Difference]: Finished difference Result 6952 states and 22145 transitions. [2021-07-13 20:39:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:39:37,373 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 [2021-07-13 20:39:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:37,388 INFO L225 Difference]: With dead ends: 6952 [2021-07-13 20:39:37,388 INFO L226 Difference]: Without dead ends: 6916 [2021-07-13 20:39:37,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:39:37,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6916 states. [2021-07-13 20:39:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6916 to 3597. [2021-07-13 20:39:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3597 states, 3596 states have (on average 3.5489432703003336) internal successors, (12762), 3596 states have internal predecessors, (12762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 12762 transitions. [2021-07-13 20:39:37,481 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 12762 transitions. Word has length 28 [2021-07-13 20:39:37,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:37,482 INFO L482 AbstractCegarLoop]: Abstraction has 3597 states and 12762 transitions. [2021-07-13 20:39:37,482 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) [2021-07-13 20:39:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 12762 transitions. [2021-07-13 20:39:37,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:37,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:37,487 INFO L508 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] [2021-07-13 20:39:37,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:37,688 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:37,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:37,688 INFO L82 PathProgramCache]: Analyzing trace with hash -833209241, now seen corresponding path program 70 times [2021-07-13 20:39:37,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:37,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395068520] [2021-07-13 20:39:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:37,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:37,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395068520] [2021-07-13 20:39:37,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395068520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:37,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064537665] [2021-07-13 20:39:37,723 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 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 [2021-07-13 20:39:37,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:37,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:37,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:39:37,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:37,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064537665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:37,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:37,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:39:37,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451159613] [2021-07-13 20:39:37,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:39:37,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:37,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:39:37,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:39:37,821 INFO L87 Difference]: Start difference. First operand 3597 states and 12762 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) [2021-07-13 20:39:38,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:38,450 INFO L93 Difference]: Finished difference Result 7145 states and 22690 transitions. [2021-07-13 20:39:38,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:39:38,450 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 [2021-07-13 20:39:38,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:38,463 INFO L225 Difference]: With dead ends: 7145 [2021-07-13 20:39:38,463 INFO L226 Difference]: Without dead ends: 7145 [2021-07-13 20:39:38,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 373.2ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:39:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7145 states. [2021-07-13 20:39:38,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7145 to 3308. [2021-07-13 20:39:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3308 states, 3307 states have (on average 3.5119443604475356) internal successors, (11614), 3307 states have internal predecessors, (11614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3308 states to 3308 states and 11614 transitions. [2021-07-13 20:39:38,549 INFO L78 Accepts]: Start accepts. Automaton has 3308 states and 11614 transitions. Word has length 28 [2021-07-13 20:39:38,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:38,549 INFO L482 AbstractCegarLoop]: Abstraction has 3308 states and 11614 transitions. [2021-07-13 20:39:38,549 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) [2021-07-13 20:39:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3308 states and 11614 transitions. [2021-07-13 20:39:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:38,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:38,554 INFO L508 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] [2021-07-13 20:39:38,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4030,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:38,755 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:38,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:38,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1266085845, now seen corresponding path program 71 times [2021-07-13 20:39:38,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:38,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586615878] [2021-07-13 20:39:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:38,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:38,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586615878] [2021-07-13 20:39:38,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586615878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:38,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496153428] [2021-07-13 20:39:38,805 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 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 [2021-07-13 20:39:38,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:39:38,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:38,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:38,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:38,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496153428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:38,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:38,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:39:38,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530710140] [2021-07-13 20:39:38,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:39:38,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:38,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:39:38,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:39:38,916 INFO L87 Difference]: Start difference. First operand 3308 states and 11614 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) [2021-07-13 20:39:39,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:39,646 INFO L93 Difference]: Finished difference Result 6241 states and 20184 transitions. [2021-07-13 20:39:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:39:39,646 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 [2021-07-13 20:39:39,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:39,658 INFO L225 Difference]: With dead ends: 6241 [2021-07-13 20:39:39,659 INFO L226 Difference]: Without dead ends: 6237 [2021-07-13 20:39:39,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 406.3ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:39:39,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-07-13 20:39:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 3068. [2021-07-13 20:39:39,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 3.53635474404956) internal successors, (10846), 3067 states have internal predecessors, (10846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 10846 transitions. [2021-07-13 20:39:39,748 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 10846 transitions. Word has length 28 [2021-07-13 20:39:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:39,748 INFO L482 AbstractCegarLoop]: Abstraction has 3068 states and 10846 transitions. [2021-07-13 20:39:39,748 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) [2021-07-13 20:39:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 10846 transitions. [2021-07-13 20:39:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:39,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:39,752 INFO L508 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] [2021-07-13 20:39:39,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4031 [2021-07-13 20:39:39,953 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:39,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1538095035, now seen corresponding path program 72 times [2021-07-13 20:39:39,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:39,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802704605] [2021-07-13 20:39:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:39,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:39,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802704605] [2021-07-13 20:39:39,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802704605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:39,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50242371] [2021-07-13 20:39:39,990 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 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 [2021-07-13 20:39:40,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:39:40,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:40,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:40,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:40,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50242371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:40,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:40,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:39:40,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916941556] [2021-07-13 20:39:40,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:39:40,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:40,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:39:40,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:39:40,113 INFO L87 Difference]: Start difference. First operand 3068 states and 10846 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) [2021-07-13 20:39:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:41,191 INFO L93 Difference]: Finished difference Result 9481 states and 30975 transitions. [2021-07-13 20:39:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:39:41,192 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 [2021-07-13 20:39:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:41,215 INFO L225 Difference]: With dead ends: 9481 [2021-07-13 20:39:41,215 INFO L226 Difference]: Without dead ends: 9481 [2021-07-13 20:39:41,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 619.4ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:39:41,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9481 states. [2021-07-13 20:39:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9481 to 3244. [2021-07-13 20:39:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3244 states, 3243 states have (on average 3.602836879432624) internal successors, (11684), 3243 states have internal predecessors, (11684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 11684 transitions. [2021-07-13 20:39:41,353 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 11684 transitions. Word has length 28 [2021-07-13 20:39:41,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:41,353 INFO L482 AbstractCegarLoop]: Abstraction has 3244 states and 11684 transitions. [2021-07-13 20:39:41,353 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) [2021-07-13 20:39:41,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 11684 transitions. [2021-07-13 20:39:41,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:41,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:41,358 INFO L508 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] [2021-07-13 20:39:41,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4032 [2021-07-13 20:39:41,558 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:41,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:41,559 INFO L82 PathProgramCache]: Analyzing trace with hash -971142955, now seen corresponding path program 73 times [2021-07-13 20:39:41,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:41,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866256985] [2021-07-13 20:39:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:41,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:41,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866256985] [2021-07-13 20:39:41,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866256985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:41,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592184433] [2021-07-13 20:39:41,593 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 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 [2021-07-13 20:39:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:41,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:41,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:41,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592184433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:41,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:41,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:39:41,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535773360] [2021-07-13 20:39:41,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:39:41,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:41,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:39:41,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:39:41,712 INFO L87 Difference]: Start difference. First operand 3244 states and 11684 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) [2021-07-13 20:39:42,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:42,739 INFO L93 Difference]: Finished difference Result 9310 states and 30510 transitions. [2021-07-13 20:39:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:39:42,740 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 [2021-07-13 20:39:42,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:42,759 INFO L225 Difference]: With dead ends: 9310 [2021-07-13 20:39:42,759 INFO L226 Difference]: Without dead ends: 9310 [2021-07-13 20:39:42,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 616.7ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:39:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9310 states. [2021-07-13 20:39:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9310 to 3216. [2021-07-13 20:39:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 3.5878693623639193) internal successors, (11535), 3215 states have internal predecessors, (11535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 11535 transitions. [2021-07-13 20:39:42,887 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 11535 transitions. Word has length 28 [2021-07-13 20:39:42,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:42,887 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 11535 transitions. [2021-07-13 20:39:42,887 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) [2021-07-13 20:39:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 11535 transitions. [2021-07-13 20:39:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:42,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:42,892 INFO L508 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] [2021-07-13 20:39:43,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4033 [2021-07-13 20:39:43,093 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:43,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2143488813, now seen corresponding path program 74 times [2021-07-13 20:39:43,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:43,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904601978] [2021-07-13 20:39:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:43,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:43,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904601978] [2021-07-13 20:39:43,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904601978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:43,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023556248] [2021-07-13 20:39:43,130 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 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 [2021-07-13 20:39:43,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:43,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:43,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:43,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:43,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023556248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:43,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:43,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:39:43,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565097380] [2021-07-13 20:39:43,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:39:43,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:43,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:39:43,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:39:43,239 INFO L87 Difference]: Start difference. First operand 3216 states and 11535 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) [2021-07-13 20:39:44,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:44,231 INFO L93 Difference]: Finished difference Result 8753 states and 27774 transitions. [2021-07-13 20:39:44,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:39:44,231 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 [2021-07-13 20:39:44,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:44,250 INFO L225 Difference]: With dead ends: 8753 [2021-07-13 20:39:44,251 INFO L226 Difference]: Without dead ends: 8753 [2021-07-13 20:39:44,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:39:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8753 states. [2021-07-13 20:39:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8753 to 3236. [2021-07-13 20:39:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 3235 states have (on average 3.591035548686244) internal successors, (11617), 3235 states have internal predecessors, (11617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:44,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 11617 transitions. [2021-07-13 20:39:44,368 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 11617 transitions. Word has length 28 [2021-07-13 20:39:44,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:44,368 INFO L482 AbstractCegarLoop]: Abstraction has 3236 states and 11617 transitions. [2021-07-13 20:39:44,368 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) [2021-07-13 20:39:44,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 11617 transitions. [2021-07-13 20:39:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:44,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:44,396 INFO L508 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] [2021-07-13 20:39:44,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4034 [2021-07-13 20:39:44,597 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:44,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:44,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2062112725, now seen corresponding path program 75 times [2021-07-13 20:39:44,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:44,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502749320] [2021-07-13 20:39:44,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:44,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:44,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502749320] [2021-07-13 20:39:44,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502749320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:44,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326793956] [2021-07-13 20:39:44,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:39:44,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:39:44,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:44,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:44,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:44,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326793956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:44,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:44,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:39:44,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942951963] [2021-07-13 20:39:44,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:39:44,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:44,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:39:44,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:39:44,744 INFO L87 Difference]: Start difference. First operand 3236 states and 11617 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) [2021-07-13 20:39:45,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:45,698 INFO L93 Difference]: Finished difference Result 8265 states and 26591 transitions. [2021-07-13 20:39:45,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:39:45,698 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 [2021-07-13 20:39:45,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:45,715 INFO L225 Difference]: With dead ends: 8265 [2021-07-13 20:39:45,715 INFO L226 Difference]: Without dead ends: 8257 [2021-07-13 20:39:45,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:39:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8257 states. [2021-07-13 20:39:45,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8257 to 3218. [2021-07-13 20:39:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 3.5871930369909855) internal successors, (11540), 3217 states have internal predecessors, (11540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 11540 transitions. [2021-07-13 20:39:45,823 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 11540 transitions. Word has length 28 [2021-07-13 20:39:45,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:45,823 INFO L482 AbstractCegarLoop]: Abstraction has 3218 states and 11540 transitions. [2021-07-13 20:39:45,823 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) [2021-07-13 20:39:45,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 11540 transitions. [2021-07-13 20:39:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:45,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:45,829 INFO L508 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] [2021-07-13 20:39:46,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-07-13 20:39:46,029 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:46,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:46,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1131455509, now seen corresponding path program 76 times [2021-07-13 20:39:46,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:46,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89336231] [2021-07-13 20:39:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:46,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:46,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89336231] [2021-07-13 20:39:46,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89336231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:46,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37874696] [2021-07-13 20:39:46,065 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 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 [2021-07-13 20:39:46,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:39:46,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:46,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:46,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:46,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37874696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:46,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:46,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:39:46,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569809445] [2021-07-13 20:39:46,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:39:46,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:46,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:39:46,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:39:46,209 INFO L87 Difference]: Start difference. First operand 3218 states and 11540 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) [2021-07-13 20:39:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:47,271 INFO L93 Difference]: Finished difference Result 8190 states and 26354 transitions. [2021-07-13 20:39:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:39:47,271 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 [2021-07-13 20:39:47,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:47,288 INFO L225 Difference]: With dead ends: 8190 [2021-07-13 20:39:47,288 INFO L226 Difference]: Without dead ends: 8190 [2021-07-13 20:39:47,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 596.4ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:39:47,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8190 states. [2021-07-13 20:39:47,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8190 to 3234. [2021-07-13 20:39:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3233 states have (on average 3.589236003711723) internal successors, (11604), 3233 states have internal predecessors, (11604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 11604 transitions. [2021-07-13 20:39:47,383 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 11604 transitions. Word has length 28 [2021-07-13 20:39:47,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:47,383 INFO L482 AbstractCegarLoop]: Abstraction has 3234 states and 11604 transitions. [2021-07-13 20:39:47,383 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) [2021-07-13 20:39:47,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 11604 transitions. [2021-07-13 20:39:47,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:47,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:47,388 INFO L508 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] [2021-07-13 20:39:47,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:47,589 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:47,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:47,589 INFO L82 PathProgramCache]: Analyzing trace with hash 511583645, now seen corresponding path program 77 times [2021-07-13 20:39:47,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:47,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130063045] [2021-07-13 20:39:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:47,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:47,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130063045] [2021-07-13 20:39:47,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130063045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:47,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908198555] [2021-07-13 20:39:47,624 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 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 [2021-07-13 20:39:47,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:39:47,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:47,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:47,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:47,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908198555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:47,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:47,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:39:47,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329616857] [2021-07-13 20:39:47,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:39:47,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:47,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:39:47,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:39:47,740 INFO L87 Difference]: Start difference. First operand 3234 states and 11604 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) [2021-07-13 20:39:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:48,761 INFO L93 Difference]: Finished difference Result 7851 states and 25552 transitions. [2021-07-13 20:39:48,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:39:48,762 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 [2021-07-13 20:39:48,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:48,777 INFO L225 Difference]: With dead ends: 7851 [2021-07-13 20:39:48,777 INFO L226 Difference]: Without dead ends: 7843 [2021-07-13 20:39:48,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 558.8ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:39:48,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7843 states. [2021-07-13 20:39:48,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7843 to 2991. [2021-07-13 20:39:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.5123745819397993) internal successors, (10502), 2990 states have internal predecessors, (10502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 10502 transitions. [2021-07-13 20:39:48,860 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 10502 transitions. Word has length 28 [2021-07-13 20:39:48,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:48,860 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 10502 transitions. [2021-07-13 20:39:48,860 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) [2021-07-13 20:39:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 10502 transitions. [2021-07-13 20:39:48,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:48,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:48,864 INFO L508 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] [2021-07-13 20:39:49,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4037,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:49,065 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:49,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:49,065 INFO L82 PathProgramCache]: Analyzing trace with hash 594987225, now seen corresponding path program 78 times [2021-07-13 20:39:49,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:49,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274059298] [2021-07-13 20:39:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:49,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:49,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274059298] [2021-07-13 20:39:49,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274059298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:49,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513724931] [2021-07-13 20:39:49,101 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 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 [2021-07-13 20:39:49,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:39:49,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:49,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:49,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:49,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513724931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:49,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:49,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:39:49,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345044798] [2021-07-13 20:39:49,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:39:49,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:49,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:39:49,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:39:49,224 INFO L87 Difference]: Start difference. First operand 2991 states and 10502 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) [2021-07-13 20:39:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:50,133 INFO L93 Difference]: Finished difference Result 6061 states and 19474 transitions. [2021-07-13 20:39:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:39:50,134 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 [2021-07-13 20:39:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:50,146 INFO L225 Difference]: With dead ends: 6061 [2021-07-13 20:39:50,146 INFO L226 Difference]: Without dead ends: 6061 [2021-07-13 20:39:50,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 545.9ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:39:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-07-13 20:39:50,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 3003. [2021-07-13 20:39:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.5109926715522985) internal successors, (10540), 3002 states have internal predecessors, (10540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:50,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 10540 transitions. [2021-07-13 20:39:50,234 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 10540 transitions. Word has length 28 [2021-07-13 20:39:50,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:50,235 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 10540 transitions. [2021-07-13 20:39:50,235 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) [2021-07-13 20:39:50,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 10540 transitions. [2021-07-13 20:39:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:50,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:50,239 INFO L508 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] [2021-07-13 20:39:50,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:50,440 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:50,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:50,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2046619895, now seen corresponding path program 79 times [2021-07-13 20:39:50,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:50,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504998210] [2021-07-13 20:39:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:50,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:50,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504998210] [2021-07-13 20:39:50,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504998210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:50,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483832261] [2021-07-13 20:39:50,478 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 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 [2021-07-13 20:39:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:50,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:50,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:50,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483832261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:50,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:50,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:39:50,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693798083] [2021-07-13 20:39:50,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:39:50,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:50,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:39:50,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:39:50,613 INFO L87 Difference]: Start difference. First operand 3003 states and 10540 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) [2021-07-13 20:39:51,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:51,734 INFO L93 Difference]: Finished difference Result 6857 states and 21507 transitions. [2021-07-13 20:39:51,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:39:51,735 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 [2021-07-13 20:39:51,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:51,748 INFO L225 Difference]: With dead ends: 6857 [2021-07-13 20:39:51,748 INFO L226 Difference]: Without dead ends: 6857 [2021-07-13 20:39:51,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 702.3ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:39:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6857 states. [2021-07-13 20:39:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6857 to 3069. [2021-07-13 20:39:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 3068 states have (on average 3.50619295958279) internal successors, (10757), 3068 states have internal predecessors, (10757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 10757 transitions. [2021-07-13 20:39:51,825 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 10757 transitions. Word has length 28 [2021-07-13 20:39:51,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:51,826 INFO L482 AbstractCegarLoop]: Abstraction has 3069 states and 10757 transitions. [2021-07-13 20:39:51,826 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) [2021-07-13 20:39:51,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 10757 transitions. [2021-07-13 20:39:51,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:51,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:51,830 INFO L508 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] [2021-07-13 20:39:52,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:52,033 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:52,033 INFO L82 PathProgramCache]: Analyzing trace with hash -403580741, now seen corresponding path program 80 times [2021-07-13 20:39:52,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:52,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272862622] [2021-07-13 20:39:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:52,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:52,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272862622] [2021-07-13 20:39:52,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272862622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:52,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684125536] [2021-07-13 20:39:52,069 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 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 [2021-07-13 20:39:52,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:52,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:52,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:52,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:52,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684125536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:52,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:52,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:39:52,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133608413] [2021-07-13 20:39:52,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:39:52,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:52,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:39:52,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:39:52,196 INFO L87 Difference]: Start difference. First operand 3069 states and 10757 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) [2021-07-13 20:39:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:53,220 INFO L93 Difference]: Finished difference Result 6397 states and 20307 transitions. [2021-07-13 20:39:53,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:39:53,220 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 [2021-07-13 20:39:53,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:53,233 INFO L225 Difference]: With dead ends: 6397 [2021-07-13 20:39:53,234 INFO L226 Difference]: Without dead ends: 6393 [2021-07-13 20:39:53,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 634.2ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:39:53,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6393 states. [2021-07-13 20:39:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6393 to 2995. [2021-07-13 20:39:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 2994 states have (on average 3.502672010688043) internal successors, (10487), 2994 states have internal predecessors, (10487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 10487 transitions. [2021-07-13 20:39:53,308 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 10487 transitions. Word has length 28 [2021-07-13 20:39:53,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:53,308 INFO L482 AbstractCegarLoop]: Abstraction has 2995 states and 10487 transitions. [2021-07-13 20:39:53,309 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) [2021-07-13 20:39:53,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 10487 transitions. [2021-07-13 20:39:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:53,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:53,313 INFO L508 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] [2021-07-13 20:39:53,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4040 [2021-07-13 20:39:53,513 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:53,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:53,513 INFO L82 PathProgramCache]: Analyzing trace with hash 175862483, now seen corresponding path program 65 times [2021-07-13 20:39:53,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:53,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021065906] [2021-07-13 20:39:53,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:53,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:53,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021065906] [2021-07-13 20:39:53,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021065906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:53,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67842321] [2021-07-13 20:39:53,555 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 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 [2021-07-13 20:39:53,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:39:53,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:53,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:53,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:53,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67842321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:53,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:53,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:39:53,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246584216] [2021-07-13 20:39:53,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:39:53,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:53,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:39:53,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:39:53,658 INFO L87 Difference]: Start difference. First operand 2995 states and 10487 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) [2021-07-13 20:39:54,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:54,242 INFO L93 Difference]: Finished difference Result 5524 states and 17848 transitions. [2021-07-13 20:39:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:39:54,242 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 [2021-07-13 20:39:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:54,253 INFO L225 Difference]: With dead ends: 5524 [2021-07-13 20:39:54,253 INFO L226 Difference]: Without dead ends: 5524 [2021-07-13 20:39:54,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:39:54,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5524 states. [2021-07-13 20:39:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5524 to 2995. [2021-07-13 20:39:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 2994 states have (on average 3.5046760187040746) internal successors, (10493), 2994 states have internal predecessors, (10493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 10493 transitions. [2021-07-13 20:39:54,326 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 10493 transitions. Word has length 28 [2021-07-13 20:39:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:54,327 INFO L482 AbstractCegarLoop]: Abstraction has 2995 states and 10493 transitions. [2021-07-13 20:39:54,327 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) [2021-07-13 20:39:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 10493 transitions. [2021-07-13 20:39:54,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:54,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:54,331 INFO L508 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] [2021-07-13 20:39:54,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4041 [2021-07-13 20:39:54,532 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:54,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1435937279, now seen corresponding path program 66 times [2021-07-13 20:39:54,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:54,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358775385] [2021-07-13 20:39:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:54,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:54,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358775385] [2021-07-13 20:39:54,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358775385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:54,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134844556] [2021-07-13 20:39:54,574 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 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 [2021-07-13 20:39:54,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:39:54,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:54,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:54,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:54,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134844556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:54,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:54,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:39:54,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049121181] [2021-07-13 20:39:54,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:39:54,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:54,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:39:54,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:39:54,679 INFO L87 Difference]: Start difference. First operand 2995 states and 10493 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) [2021-07-13 20:39:55,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:55,467 INFO L93 Difference]: Finished difference Result 5876 states and 18839 transitions. [2021-07-13 20:39:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:39:55,468 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 [2021-07-13 20:39:55,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:55,480 INFO L225 Difference]: With dead ends: 5876 [2021-07-13 20:39:55,480 INFO L226 Difference]: Without dead ends: 5876 [2021-07-13 20:39:55,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 458.2ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:39:55,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5876 states. [2021-07-13 20:39:55,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5876 to 2986. [2021-07-13 20:39:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 3.504857621440536) internal successors, (10462), 2985 states have internal predecessors, (10462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 10462 transitions. [2021-07-13 20:39:55,548 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 10462 transitions. Word has length 28 [2021-07-13 20:39:55,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:55,548 INFO L482 AbstractCegarLoop]: Abstraction has 2986 states and 10462 transitions. [2021-07-13 20:39:55,548 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) [2021-07-13 20:39:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 10462 transitions. [2021-07-13 20:39:55,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:55,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:55,552 INFO L508 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] [2021-07-13 20:39:55,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4042 [2021-07-13 20:39:55,753 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:55,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1667476927, now seen corresponding path program 67 times [2021-07-13 20:39:55,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:55,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145596722] [2021-07-13 20:39:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:55,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:55,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145596722] [2021-07-13 20:39:55,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145596722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:55,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128935307] [2021-07-13 20:39:55,802 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 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 [2021-07-13 20:39:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:55,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:55,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:55,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128935307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:55,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:55,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:39:55,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048312030] [2021-07-13 20:39:55,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:39:55,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:55,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:39:55,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:39:55,928 INFO L87 Difference]: Start difference. First operand 2986 states and 10462 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) [2021-07-13 20:39:56,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:56,854 INFO L93 Difference]: Finished difference Result 6350 states and 20120 transitions. [2021-07-13 20:39:56,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:39:56,854 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 [2021-07-13 20:39:56,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:56,867 INFO L225 Difference]: With dead ends: 6350 [2021-07-13 20:39:56,867 INFO L226 Difference]: Without dead ends: 6350 [2021-07-13 20:39:56,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 540.6ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:39:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6350 states. [2021-07-13 20:39:56,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6350 to 3046. [2021-07-13 20:39:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.5008210180623975) internal successors, (10660), 3045 states have internal predecessors, (10660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 10660 transitions. [2021-07-13 20:39:56,944 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 10660 transitions. Word has length 28 [2021-07-13 20:39:56,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:56,944 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 10660 transitions. [2021-07-13 20:39:56,944 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) [2021-07-13 20:39:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 10660 transitions. [2021-07-13 20:39:56,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:56,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:56,948 INFO L508 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] [2021-07-13 20:39:57,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4043,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:39:57,149 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:57,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1647761113, now seen corresponding path program 68 times [2021-07-13 20:39:57,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:57,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227189985] [2021-07-13 20:39:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:57,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:57,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227189985] [2021-07-13 20:39:57,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227189985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:57,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564883722] [2021-07-13 20:39:57,186 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 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 [2021-07-13 20:39:57,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:39:57,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:57,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:57,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:57,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564883722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:57,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:57,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:39:57,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985013505] [2021-07-13 20:39:57,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:39:57,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:57,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:39:57,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:39:57,307 INFO L87 Difference]: Start difference. First operand 3046 states and 10660 transitions. Second operand has 16 states, 16 states have (on average 2.9375) 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) [2021-07-13 20:39:57,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:57,869 INFO L93 Difference]: Finished difference Result 7170 states and 24220 transitions. [2021-07-13 20:39:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:39:57,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) 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 [2021-07-13 20:39:57,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:57,891 INFO L225 Difference]: With dead ends: 7170 [2021-07-13 20:39:57,891 INFO L226 Difference]: Without dead ends: 7170 [2021-07-13 20:39:57,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:39:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7170 states. [2021-07-13 20:39:57,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7170 to 4145. [2021-07-13 20:39:57,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 4144 states have (on average 3.618484555984556) internal successors, (14995), 4144 states have internal predecessors, (14995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:57,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 14995 transitions. [2021-07-13 20:39:57,999 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 14995 transitions. Word has length 28 [2021-07-13 20:39:57,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:57,999 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 14995 transitions. [2021-07-13 20:39:57,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) 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) [2021-07-13 20:39:57,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 14995 transitions. [2021-07-13 20:39:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:58,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:58,006 INFO L508 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] [2021-07-13 20:39:58,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4044 [2021-07-13 20:39:58,206 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:58,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:58,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1712298069, now seen corresponding path program 69 times [2021-07-13 20:39:58,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:58,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779169184] [2021-07-13 20:39:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:58,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:58,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779169184] [2021-07-13 20:39:58,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779169184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:58,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897307817] [2021-07-13 20:39:58,255 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 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 [2021-07-13 20:39:58,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:39:58,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:39:58,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:58,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897307817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:58,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:58,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:39:58,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436889627] [2021-07-13 20:39:58,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:39:58,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:58,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:39:58,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:39:58,352 INFO L87 Difference]: Start difference. First operand 4145 states and 14995 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) [2021-07-13 20:39:59,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:39:59,157 INFO L93 Difference]: Finished difference Result 7513 states and 25430 transitions. [2021-07-13 20:39:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:39:59,158 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 [2021-07-13 20:39:59,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:39:59,173 INFO L225 Difference]: With dead ends: 7513 [2021-07-13 20:39:59,173 INFO L226 Difference]: Without dead ends: 7509 [2021-07-13 20:39:59,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 489.1ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:39:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7509 states. [2021-07-13 20:39:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7509 to 4037. [2021-07-13 20:39:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4037 states, 4036 states have (on average 3.627601585728444) internal successors, (14641), 4036 states have internal predecessors, (14641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:39:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4037 states to 4037 states and 14641 transitions. [2021-07-13 20:39:59,270 INFO L78 Accepts]: Start accepts. Automaton has 4037 states and 14641 transitions. Word has length 28 [2021-07-13 20:39:59,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:39:59,271 INFO L482 AbstractCegarLoop]: Abstraction has 4037 states and 14641 transitions. [2021-07-13 20:39:59,271 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) [2021-07-13 20:39:59,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4037 states and 14641 transitions. [2021-07-13 20:39:59,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:39:59,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:39:59,277 INFO L508 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] [2021-07-13 20:39:59,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4045 [2021-07-13 20:39:59,478 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:39:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:39:59,478 INFO L82 PathProgramCache]: Analyzing trace with hash 307959399, now seen corresponding path program 81 times [2021-07-13 20:39:59,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:39:59,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073848017] [2021-07-13 20:39:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:39:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:39:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:59,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:39:59,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073848017] [2021-07-13 20:39:59,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073848017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:59,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392964851] [2021-07-13 20:39:59,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:39:59,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:39:59,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:39:59,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:39:59,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:39:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:39:59,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392964851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:39:59,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:39:59,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:39:59,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067459542] [2021-07-13 20:39:59,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:39:59,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:39:59,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:39:59,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:39:59,621 INFO L87 Difference]: Start difference. First operand 4037 states and 14641 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) [2021-07-13 20:40:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:00,505 INFO L93 Difference]: Finished difference Result 8340 states and 27997 transitions. [2021-07-13 20:40:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:40:00,506 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 [2021-07-13 20:40:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:00,521 INFO L225 Difference]: With dead ends: 8340 [2021-07-13 20:40:00,522 INFO L226 Difference]: Without dead ends: 8331 [2021-07-13 20:40:00,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 517.3ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:40:00,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8331 states. [2021-07-13 20:40:00,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8331 to 4477. [2021-07-13 20:40:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4476 states have (on average 3.7155942806076854) internal successors, (16631), 4476 states have internal predecessors, (16631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 16631 transitions. [2021-07-13 20:40:00,633 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 16631 transitions. Word has length 28 [2021-07-13 20:40:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:00,633 INFO L482 AbstractCegarLoop]: Abstraction has 4477 states and 16631 transitions. [2021-07-13 20:40:00,633 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) [2021-07-13 20:40:00,633 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 16631 transitions. [2021-07-13 20:40:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:00,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:00,640 INFO L508 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] [2021-07-13 20:40:00,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4046 [2021-07-13 20:40:00,841 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:00,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:00,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1945666497, now seen corresponding path program 82 times [2021-07-13 20:40:00,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:00,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989264978] [2021-07-13 20:40:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:00,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:00,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989264978] [2021-07-13 20:40:00,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989264978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:00,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082652346] [2021-07-13 20:40:00,871 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 [2021-07-13 20:40:00,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:00,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:00,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:40:00,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:00,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082652346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:00,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:00,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:40:00,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351730499] [2021-07-13 20:40:00,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:40:00,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:00,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:40:00,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:40:00,983 INFO L87 Difference]: Start difference. First operand 4477 states and 16631 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) [2021-07-13 20:40:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:01,831 INFO L93 Difference]: Finished difference Result 8630 states and 28901 transitions. [2021-07-13 20:40:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:40:01,831 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 [2021-07-13 20:40:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:01,850 INFO L225 Difference]: With dead ends: 8630 [2021-07-13 20:40:01,850 INFO L226 Difference]: Without dead ends: 8630 [2021-07-13 20:40:01,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 496.2ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:40:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8630 states. [2021-07-13 20:40:01,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8630 to 4491. [2021-07-13 20:40:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4491 states, 4490 states have (on average 3.7028953229398662) internal successors, (16626), 4490 states have internal predecessors, (16626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4491 states to 4491 states and 16626 transitions. [2021-07-13 20:40:02,001 INFO L78 Accepts]: Start accepts. Automaton has 4491 states and 16626 transitions. Word has length 28 [2021-07-13 20:40:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:02,001 INFO L482 AbstractCegarLoop]: Abstraction has 4491 states and 16626 transitions. [2021-07-13 20:40:02,001 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) [2021-07-13 20:40:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 4491 states and 16626 transitions. [2021-07-13 20:40:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:02,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:02,008 INFO L508 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] [2021-07-13 20:40:02,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:02,208 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:02,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1145894509, now seen corresponding path program 83 times [2021-07-13 20:40:02,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:02,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557154962] [2021-07-13 20:40:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:02,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:02,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557154962] [2021-07-13 20:40:02,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557154962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:02,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057851276] [2021-07-13 20:40:02,242 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 [2021-07-13 20:40:02,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:40:02,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:02,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:40:02,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:02,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057851276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:02,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:02,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:40:02,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300797594] [2021-07-13 20:40:02,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:40:02,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:02,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:40:02,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:40:02,329 INFO L87 Difference]: Start difference. First operand 4491 states and 16626 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) [2021-07-13 20:40:02,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:02,795 INFO L93 Difference]: Finished difference Result 8035 states and 28348 transitions. [2021-07-13 20:40:02,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:40:02,796 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 [2021-07-13 20:40:02,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:02,814 INFO L225 Difference]: With dead ends: 8035 [2021-07-13 20:40:02,814 INFO L226 Difference]: Without dead ends: 7938 [2021-07-13 20:40:02,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:40:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7938 states. [2021-07-13 20:40:02,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7938 to 5963. [2021-07-13 20:40:02,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5963 states, 5962 states have (on average 3.763837638376384) internal successors, (22440), 5962 states have internal predecessors, (22440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 22440 transitions. [2021-07-13 20:40:02,943 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 22440 transitions. Word has length 28 [2021-07-13 20:40:02,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:02,943 INFO L482 AbstractCegarLoop]: Abstraction has 5963 states and 22440 transitions. [2021-07-13 20:40:02,943 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) [2021-07-13 20:40:02,944 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 22440 transitions. [2021-07-13 20:40:02,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:02,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:02,954 INFO L508 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] [2021-07-13 20:40:03,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:03,154 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:03,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1941057807, now seen corresponding path program 84 times [2021-07-13 20:40:03,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:03,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098466119] [2021-07-13 20:40:03,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:03,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:03,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098466119] [2021-07-13 20:40:03,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098466119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:03,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957511431] [2021-07-13 20:40:03,182 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 [2021-07-13 20:40:03,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:40:03,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:03,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:40:03,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:03,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957511431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:03,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:03,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:40:03,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228401773] [2021-07-13 20:40:03,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:40:03,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:03,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:40:03,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:40:03,262 INFO L87 Difference]: Start difference. First operand 5963 states and 22440 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) [2021-07-13 20:40:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:03,454 INFO L93 Difference]: Finished difference Result 8287 states and 29195 transitions. [2021-07-13 20:40:03,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:40:03,454 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 [2021-07-13 20:40:03,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:03,474 INFO L225 Difference]: With dead ends: 8287 [2021-07-13 20:40:03,474 INFO L226 Difference]: Without dead ends: 8287 [2021-07-13 20:40:03,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:40:03,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8287 states. [2021-07-13 20:40:03,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8287 to 6088. [2021-07-13 20:40:03,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6088 states, 6087 states have (on average 3.741416132741909) internal successors, (22774), 6087 states have internal predecessors, (22774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6088 states to 6088 states and 22774 transitions. [2021-07-13 20:40:03,632 INFO L78 Accepts]: Start accepts. Automaton has 6088 states and 22774 transitions. Word has length 28 [2021-07-13 20:40:03,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:03,632 INFO L482 AbstractCegarLoop]: Abstraction has 6088 states and 22774 transitions. [2021-07-13 20:40:03,632 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) [2021-07-13 20:40:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 6088 states and 22774 transitions. [2021-07-13 20:40:03,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:03,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:03,642 INFO L508 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] [2021-07-13 20:40:03,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:03,843 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:03,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1010858063, now seen corresponding path program 85 times [2021-07-13 20:40:03,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:03,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910996694] [2021-07-13 20:40:03,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:03,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:03,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910996694] [2021-07-13 20:40:03,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910996694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:03,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21814164] [2021-07-13 20:40:03,884 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 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 [2021-07-13 20:40:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:03,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:03,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:03,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21814164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:03,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:03,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:40:03,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36397229] [2021-07-13 20:40:03,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:40:03,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:03,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:40:03,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:40:03,975 INFO L87 Difference]: Start difference. First operand 6088 states and 22774 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) [2021-07-13 20:40:04,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:04,744 INFO L93 Difference]: Finished difference Result 12628 states and 43945 transitions. [2021-07-13 20:40:04,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:40:04,745 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 [2021-07-13 20:40:04,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:04,776 INFO L225 Difference]: With dead ends: 12628 [2021-07-13 20:40:04,776 INFO L226 Difference]: Without dead ends: 12628 [2021-07-13 20:40:04,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:40:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12628 states. [2021-07-13 20:40:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12628 to 6761. [2021-07-13 20:40:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6761 states, 6760 states have (on average 3.7547337278106507) internal successors, (25382), 6760 states have internal predecessors, (25382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6761 states to 6761 states and 25382 transitions. [2021-07-13 20:40:04,969 INFO L78 Accepts]: Start accepts. Automaton has 6761 states and 25382 transitions. Word has length 28 [2021-07-13 20:40:04,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:04,969 INFO L482 AbstractCegarLoop]: Abstraction has 6761 states and 25382 transitions. [2021-07-13 20:40:04,970 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) [2021-07-13 20:40:04,970 INFO L276 IsEmpty]: Start isEmpty. Operand 6761 states and 25382 transitions. [2021-07-13 20:40:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:04,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:04,981 INFO L508 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] [2021-07-13 20:40:05,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4050 [2021-07-13 20:40:05,182 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:05,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:05,182 INFO L82 PathProgramCache]: Analyzing trace with hash 891821389, now seen corresponding path program 86 times [2021-07-13 20:40:05,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:05,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176819721] [2021-07-13 20:40:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:05,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:05,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176819721] [2021-07-13 20:40:05,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176819721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:05,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858473595] [2021-07-13 20:40:05,217 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 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 [2021-07-13 20:40:05,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:05,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:05,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:05,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858473595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:05,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:05,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:40:05,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696055603] [2021-07-13 20:40:05,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:40:05,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:05,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:40:05,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:40:05,364 INFO L87 Difference]: Start difference. First operand 6761 states and 25382 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) [2021-07-13 20:40:06,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:06,071 INFO L93 Difference]: Finished difference Result 12791 states and 44537 transitions. [2021-07-13 20:40:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:40:06,072 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 [2021-07-13 20:40:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:06,104 INFO L225 Difference]: With dead ends: 12791 [2021-07-13 20:40:06,104 INFO L226 Difference]: Without dead ends: 12791 [2021-07-13 20:40:06,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:40:06,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12791 states. [2021-07-13 20:40:06,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12791 to 6999. [2021-07-13 20:40:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6999 states, 6998 states have (on average 3.734352672192055) internal successors, (26133), 6998 states have internal predecessors, (26133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6999 states to 6999 states and 26133 transitions. [2021-07-13 20:40:06,287 INFO L78 Accepts]: Start accepts. Automaton has 6999 states and 26133 transitions. Word has length 28 [2021-07-13 20:40:06,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:06,287 INFO L482 AbstractCegarLoop]: Abstraction has 6999 states and 26133 transitions. [2021-07-13 20:40:06,287 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) [2021-07-13 20:40:06,287 INFO L276 IsEmpty]: Start isEmpty. Operand 6999 states and 26133 transitions. [2021-07-13 20:40:06,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:06,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:06,299 INFO L508 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] [2021-07-13 20:40:06,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4051,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:06,500 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:06,500 INFO L82 PathProgramCache]: Analyzing trace with hash -191201267, now seen corresponding path program 87 times [2021-07-13 20:40:06,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:06,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229333976] [2021-07-13 20:40:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:06,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:06,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229333976] [2021-07-13 20:40:06,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229333976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:06,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912114680] [2021-07-13 20:40:06,529 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 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 [2021-07-13 20:40:06,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:40:06,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:06,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:40:06,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:06,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912114680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:06,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:06,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:40:06,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113892921] [2021-07-13 20:40:06,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:40:06,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:06,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:40:06,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:40:06,658 INFO L87 Difference]: Start difference. First operand 6999 states and 26133 transitions. Second operand has 15 states, 15 states have (on average 3.2) 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) [2021-07-13 20:40:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:07,450 INFO L93 Difference]: Finished difference Result 9904 states and 35142 transitions. [2021-07-13 20:40:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:40:07,450 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) 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 [2021-07-13 20:40:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:07,475 INFO L225 Difference]: With dead ends: 9904 [2021-07-13 20:40:07,475 INFO L226 Difference]: Without dead ends: 9816 [2021-07-13 20:40:07,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 510.0ms TimeCoverageRelationStatistics Valid=534, Invalid=1916, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:40:07,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9816 states. [2021-07-13 20:40:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9816 to 7496. [2021-07-13 20:40:07,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7496 states, 7495 states have (on average 3.741160773849233) internal successors, (28040), 7495 states have internal predecessors, (28040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7496 states to 7496 states and 28040 transitions. [2021-07-13 20:40:07,651 INFO L78 Accepts]: Start accepts. Automaton has 7496 states and 28040 transitions. Word has length 28 [2021-07-13 20:40:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:07,651 INFO L482 AbstractCegarLoop]: Abstraction has 7496 states and 28040 transitions. [2021-07-13 20:40:07,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) 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) [2021-07-13 20:40:07,651 INFO L276 IsEmpty]: Start isEmpty. Operand 7496 states and 28040 transitions. [2021-07-13 20:40:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:07,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:07,664 INFO L508 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] [2021-07-13 20:40:07,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4052 [2021-07-13 20:40:07,865 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:07,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:07,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1279876851, now seen corresponding path program 88 times [2021-07-13 20:40:07,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:07,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938606974] [2021-07-13 20:40:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:07,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:07,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938606974] [2021-07-13 20:40:07,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938606974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:07,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709657434] [2021-07-13 20:40:07,894 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 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 [2021-07-13 20:40:07,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:07,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:07,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:40:07,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:07,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709657434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:07,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:07,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:40:07,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979020605] [2021-07-13 20:40:07,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:40:07,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:07,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:40:07,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:40:07,982 INFO L87 Difference]: Start difference. First operand 7496 states and 28040 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) [2021-07-13 20:40:08,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:08,349 INFO L93 Difference]: Finished difference Result 11192 states and 39947 transitions. [2021-07-13 20:40:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:40:08,350 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 [2021-07-13 20:40:08,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:08,380 INFO L225 Difference]: With dead ends: 11192 [2021-07-13 20:40:08,380 INFO L226 Difference]: Without dead ends: 11192 [2021-07-13 20:40:08,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:40:08,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11192 states. [2021-07-13 20:40:08,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11192 to 8528. [2021-07-13 20:40:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8528 states, 8527 states have (on average 3.7686173331769672) internal successors, (32135), 8527 states have internal predecessors, (32135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8528 states to 8528 states and 32135 transitions. [2021-07-13 20:40:08,644 INFO L78 Accepts]: Start accepts. Automaton has 8528 states and 32135 transitions. Word has length 28 [2021-07-13 20:40:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:08,644 INFO L482 AbstractCegarLoop]: Abstraction has 8528 states and 32135 transitions. [2021-07-13 20:40:08,644 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) [2021-07-13 20:40:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 8528 states and 32135 transitions. [2021-07-13 20:40:08,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:08,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:08,659 INFO L508 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] [2021-07-13 20:40:08,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-07-13 20:40:08,859 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:08,860 INFO L82 PathProgramCache]: Analyzing trace with hash 847000247, now seen corresponding path program 89 times [2021-07-13 20:40:08,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:08,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166137785] [2021-07-13 20:40:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:08,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:08,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166137785] [2021-07-13 20:40:08,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166137785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:08,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010631813] [2021-07-13 20:40:08,898 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 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 [2021-07-13 20:40:08,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:40:08,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:08,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:08,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:08,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010631813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:08,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:08,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:40:08,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494110903] [2021-07-13 20:40:08,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:40:08,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:08,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:40:08,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:40:08,992 INFO L87 Difference]: Start difference. First operand 8528 states and 32135 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) [2021-07-13 20:40:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:09,645 INFO L93 Difference]: Finished difference Result 14252 states and 50831 transitions. [2021-07-13 20:40:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:40:09,645 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 [2021-07-13 20:40:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:09,684 INFO L225 Difference]: With dead ends: 14252 [2021-07-13 20:40:09,684 INFO L226 Difference]: Without dead ends: 14248 [2021-07-13 20:40:09,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 345.5ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:40:09,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14248 states. [2021-07-13 20:40:09,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14248 to 8428. [2021-07-13 20:40:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8428 states, 8427 states have (on average 3.77251690993236) internal successors, (31791), 8427 states have internal predecessors, (31791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8428 states to 8428 states and 31791 transitions. [2021-07-13 20:40:09,918 INFO L78 Accepts]: Start accepts. Automaton has 8428 states and 31791 transitions. Word has length 28 [2021-07-13 20:40:09,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:09,918 INFO L482 AbstractCegarLoop]: Abstraction has 8428 states and 31791 transitions. [2021-07-13 20:40:09,918 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) [2021-07-13 20:40:09,918 INFO L276 IsEmpty]: Start isEmpty. Operand 8428 states and 31791 transitions. [2021-07-13 20:40:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:09,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:09,932 INFO L508 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] [2021-07-13 20:40:10,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4054 [2021-07-13 20:40:10,133 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:10,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:10,133 INFO L82 PathProgramCache]: Analyzing trace with hash 795274241, now seen corresponding path program 90 times [2021-07-13 20:40:10,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:10,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40340210] [2021-07-13 20:40:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:10,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:10,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40340210] [2021-07-13 20:40:10,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40340210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:10,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895187523] [2021-07-13 20:40:10,168 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 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 [2021-07-13 20:40:10,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:40:10,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:10,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:40:10,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:10,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895187523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:10,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:10,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:40:10,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495687320] [2021-07-13 20:40:10,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:40:10,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:10,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:40:10,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:40:10,259 INFO L87 Difference]: Start difference. First operand 8428 states and 31791 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) [2021-07-13 20:40:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:10,750 INFO L93 Difference]: Finished difference Result 11465 states and 40959 transitions. [2021-07-13 20:40:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:40:10,750 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 [2021-07-13 20:40:10,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:10,778 INFO L225 Difference]: With dead ends: 11465 [2021-07-13 20:40:10,778 INFO L226 Difference]: Without dead ends: 11465 [2021-07-13 20:40:10,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:40:10,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11465 states. [2021-07-13 20:40:10,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11465 to 8331. [2021-07-13 20:40:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 3.768667466986795) internal successors, (31393), 8330 states have internal predecessors, (31393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31393 transitions. [2021-07-13 20:40:10,964 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31393 transitions. Word has length 28 [2021-07-13 20:40:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:10,964 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31393 transitions. [2021-07-13 20:40:10,964 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) [2021-07-13 20:40:10,964 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31393 transitions. [2021-07-13 20:40:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:10,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:10,979 INFO L508 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] [2021-07-13 20:40:11,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4055 [2021-07-13 20:40:11,180 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:11,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:11,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1444336905, now seen corresponding path program 91 times [2021-07-13 20:40:11,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:11,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317433334] [2021-07-13 20:40:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:11,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:11,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317433334] [2021-07-13 20:40:11,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317433334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:11,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434118806] [2021-07-13 20:40:11,220 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 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 [2021-07-13 20:40:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:11,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:11,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:11,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434118806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:11,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:11,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:40:11,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883474320] [2021-07-13 20:40:11,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:40:11,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:11,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:40:11,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:40:11,303 INFO L87 Difference]: Start difference. First operand 8331 states and 31393 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) [2021-07-13 20:40:12,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:12,017 INFO L93 Difference]: Finished difference Result 14086 states and 50169 transitions. [2021-07-13 20:40:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:40:12,017 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 [2021-07-13 20:40:12,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:12,051 INFO L225 Difference]: With dead ends: 14086 [2021-07-13 20:40:12,051 INFO L226 Difference]: Without dead ends: 14074 [2021-07-13 20:40:12,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 379.1ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:40:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14074 states. [2021-07-13 20:40:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14074 to 8331. [2021-07-13 20:40:12,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 3.768187274909964) internal successors, (31389), 8330 states have internal predecessors, (31389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:12,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31389 transitions. [2021-07-13 20:40:12,311 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31389 transitions. Word has length 28 [2021-07-13 20:40:12,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:12,312 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31389 transitions. [2021-07-13 20:40:12,312 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) [2021-07-13 20:40:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31389 transitions. [2021-07-13 20:40:12,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:12,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:12,327 INFO L508 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] [2021-07-13 20:40:12,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-07-13 20:40:12,528 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:12,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:12,528 INFO L82 PathProgramCache]: Analyzing trace with hash -323944011, now seen corresponding path program 92 times [2021-07-13 20:40:12,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:12,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958455671] [2021-07-13 20:40:12,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:12,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:12,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958455671] [2021-07-13 20:40:12,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958455671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:12,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64991199] [2021-07-13 20:40:12,569 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 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 [2021-07-13 20:40:12,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:12,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:12,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:12,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:12,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64991199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:12,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:12,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:40:12,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512897601] [2021-07-13 20:40:12,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:40:12,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:12,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:40:12,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:40:12,669 INFO L87 Difference]: Start difference. First operand 8331 states and 31389 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) [2021-07-13 20:40:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:13,889 INFO L93 Difference]: Finished difference Result 21250 states and 74521 transitions. [2021-07-13 20:40:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:40:13,889 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 [2021-07-13 20:40:13,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:13,946 INFO L225 Difference]: With dead ends: 21250 [2021-07-13 20:40:13,946 INFO L226 Difference]: Without dead ends: 21250 [2021-07-13 20:40:13,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 724.6ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:40:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21250 states. [2021-07-13 20:40:14,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21250 to 11363. [2021-07-13 20:40:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11363 states, 11362 states have (on average 3.808924485125858) internal successors, (43277), 11362 states have internal predecessors, (43277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11363 states to 11363 states and 43277 transitions. [2021-07-13 20:40:14,392 INFO L78 Accepts]: Start accepts. Automaton has 11363 states and 43277 transitions. Word has length 28 [2021-07-13 20:40:14,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:14,392 INFO L482 AbstractCegarLoop]: Abstraction has 11363 states and 43277 transitions. [2021-07-13 20:40:14,392 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) [2021-07-13 20:40:14,393 INFO L276 IsEmpty]: Start isEmpty. Operand 11363 states and 43277 transitions. [2021-07-13 20:40:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:14,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:14,415 INFO L508 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] [2021-07-13 20:40:14,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-07-13 20:40:14,615 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:14,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:14,616 INFO L82 PathProgramCache]: Analyzing trace with hash -242567923, now seen corresponding path program 93 times [2021-07-13 20:40:14,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:14,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697390938] [2021-07-13 20:40:14,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:14,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:14,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697390938] [2021-07-13 20:40:14,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697390938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:14,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176614392] [2021-07-13 20:40:14,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:40:14,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:40:14,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:14,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:14,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:14,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176614392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:14,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:14,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:40:14,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273680251] [2021-07-13 20:40:14,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:40:14,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:14,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:40:14,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:40:14,758 INFO L87 Difference]: Start difference. First operand 11363 states and 43277 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) [2021-07-13 20:40:15,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:15,962 INFO L93 Difference]: Finished difference Result 20481 states and 72514 transitions. [2021-07-13 20:40:15,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:40:15,962 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 [2021-07-13 20:40:15,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:16,020 INFO L225 Difference]: With dead ends: 20481 [2021-07-13 20:40:16,020 INFO L226 Difference]: Without dead ends: 20469 [2021-07-13 20:40:16,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 641.2ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:40:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20469 states. [2021-07-13 20:40:16,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20469 to 11177. [2021-07-13 20:40:16,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11177 states, 11176 states have (on average 3.815139584824624) internal successors, (42638), 11176 states have internal predecessors, (42638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11177 states to 11177 states and 42638 transitions. [2021-07-13 20:40:16,392 INFO L78 Accepts]: Start accepts. Automaton has 11177 states and 42638 transitions. Word has length 28 [2021-07-13 20:40:16,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:16,392 INFO L482 AbstractCegarLoop]: Abstraction has 11177 states and 42638 transitions. [2021-07-13 20:40:16,392 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) [2021-07-13 20:40:16,392 INFO L276 IsEmpty]: Start isEmpty. Operand 11177 states and 42638 transitions. [2021-07-13 20:40:16,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:16,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:16,413 INFO L508 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] [2021-07-13 20:40:16,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4058,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:16,614 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:16,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1757659895, now seen corresponding path program 94 times [2021-07-13 20:40:16,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:16,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622848230] [2021-07-13 20:40:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:16,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:16,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622848230] [2021-07-13 20:40:16,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622848230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:16,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831120940] [2021-07-13 20:40:16,656 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 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 [2021-07-13 20:40:16,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:16,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:16,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:16,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:16,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831120940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:16,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:16,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:40:16,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933740540] [2021-07-13 20:40:16,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:40:16,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:16,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:40:16,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:40:16,750 INFO L87 Difference]: Start difference. First operand 11177 states and 42638 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) [2021-07-13 20:40:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:17,920 INFO L93 Difference]: Finished difference Result 20316 states and 71936 transitions. [2021-07-13 20:40:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:40:17,921 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 [2021-07-13 20:40:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:17,991 INFO L225 Difference]: With dead ends: 20316 [2021-07-13 20:40:17,991 INFO L226 Difference]: Without dead ends: 20280 [2021-07-13 20:40:17,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 649.4ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:40:18,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20280 states. [2021-07-13 20:40:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20280 to 11229. [2021-07-13 20:40:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11229 states, 11228 states have (on average 3.813323833273958) internal successors, (42816), 11228 states have internal predecessors, (42816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11229 states to 11229 states and 42816 transitions. [2021-07-13 20:40:18,397 INFO L78 Accepts]: Start accepts. Automaton has 11229 states and 42816 transitions. Word has length 28 [2021-07-13 20:40:18,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:18,398 INFO L482 AbstractCegarLoop]: Abstraction has 11229 states and 42816 transitions. [2021-07-13 20:40:18,398 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) [2021-07-13 20:40:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 11229 states and 42816 transitions. [2021-07-13 20:40:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:18,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:18,421 INFO L508 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] [2021-07-13 20:40:18,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4059 [2021-07-13 20:40:18,621 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:18,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:18,621 INFO L82 PathProgramCache]: Analyzing trace with hash -160533179, now seen corresponding path program 95 times [2021-07-13 20:40:18,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:18,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256199230] [2021-07-13 20:40:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:18,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:18,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256199230] [2021-07-13 20:40:18,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256199230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:18,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73362700] [2021-07-13 20:40:18,663 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 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 [2021-07-13 20:40:18,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:40:18,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:18,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:18,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:18,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73362700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:18,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:18,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:40:18,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026622592] [2021-07-13 20:40:18,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:40:18,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:18,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:40:18,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:40:18,787 INFO L87 Difference]: Start difference. First operand 11229 states and 42816 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) [2021-07-13 20:40:20,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:20,336 INFO L93 Difference]: Finished difference Result 20201 states and 71663 transitions. [2021-07-13 20:40:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:40:20,336 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 [2021-07-13 20:40:20,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:20,388 INFO L225 Difference]: With dead ends: 20201 [2021-07-13 20:40:20,388 INFO L226 Difference]: Without dead ends: 20201 [2021-07-13 20:40:20,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 920.6ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:40:20,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20201 states. [2021-07-13 20:40:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20201 to 11425. [2021-07-13 20:40:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11425 states, 11424 states have (on average 3.804796918767507) internal successors, (43466), 11424 states have internal predecessors, (43466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:20,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11425 states to 11425 states and 43466 transitions. [2021-07-13 20:40:20,761 INFO L78 Accepts]: Start accepts. Automaton has 11425 states and 43466 transitions. Word has length 28 [2021-07-13 20:40:20,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:20,761 INFO L482 AbstractCegarLoop]: Abstraction has 11425 states and 43466 transitions. [2021-07-13 20:40:20,761 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) [2021-07-13 20:40:20,762 INFO L276 IsEmpty]: Start isEmpty. Operand 11425 states and 43466 transitions. [2021-07-13 20:40:20,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:20,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:20,783 INFO L508 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] [2021-07-13 20:40:20,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4060,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:20,983 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:20,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1482505975, now seen corresponding path program 96 times [2021-07-13 20:40:20,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:20,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928764321] [2021-07-13 20:40:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:21,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:21,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928764321] [2021-07-13 20:40:21,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928764321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:21,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229796156] [2021-07-13 20:40:21,025 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 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 [2021-07-13 20:40:21,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:40:21,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:21,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:21,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:21,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229796156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:21,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:21,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:40:21,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626913160] [2021-07-13 20:40:21,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:40:21,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:21,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:40:21,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:40:21,191 INFO L87 Difference]: Start difference. First operand 11425 states and 43466 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) [2021-07-13 20:40:22,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:22,518 INFO L93 Difference]: Finished difference Result 19821 states and 70618 transitions. [2021-07-13 20:40:22,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:40:22,518 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 [2021-07-13 20:40:22,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:22,569 INFO L225 Difference]: With dead ends: 19821 [2021-07-13 20:40:22,569 INFO L226 Difference]: Without dead ends: 19809 [2021-07-13 20:40:22,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 818.7ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:40:22,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19809 states. [2021-07-13 20:40:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19809 to 11307. [2021-07-13 20:40:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11307 states, 11306 states have (on average 3.8090394480806653) internal successors, (43065), 11306 states have internal predecessors, (43065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11307 states to 11307 states and 43065 transitions. [2021-07-13 20:40:22,894 INFO L78 Accepts]: Start accepts. Automaton has 11307 states and 43065 transitions. Word has length 28 [2021-07-13 20:40:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:22,894 INFO L482 AbstractCegarLoop]: Abstraction has 11307 states and 43065 transitions. [2021-07-13 20:40:22,894 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) [2021-07-13 20:40:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 11307 states and 43065 transitions. [2021-07-13 20:40:22,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:22,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:22,914 INFO L508 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] [2021-07-13 20:40:23,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4061,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:23,114 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:23,115 INFO L82 PathProgramCache]: Analyzing trace with hash 215048797, now seen corresponding path program 97 times [2021-07-13 20:40:23,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:23,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791950996] [2021-07-13 20:40:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:23,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:23,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791950996] [2021-07-13 20:40:23,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791950996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:23,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766735659] [2021-07-13 20:40:23,162 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 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 [2021-07-13 20:40:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:23,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:23,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:23,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766735659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:23,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:23,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:40:23,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932512330] [2021-07-13 20:40:23,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:40:23,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:23,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:40:23,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:40:23,265 INFO L87 Difference]: Start difference. First operand 11307 states and 43065 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) [2021-07-13 20:40:24,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:24,371 INFO L93 Difference]: Finished difference Result 19061 states and 68534 transitions. [2021-07-13 20:40:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:40:24,371 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 [2021-07-13 20:40:24,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:24,419 INFO L225 Difference]: With dead ends: 19061 [2021-07-13 20:40:24,419 INFO L226 Difference]: Without dead ends: 19025 [2021-07-13 20:40:24,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 627.9ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:40:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19025 states. [2021-07-13 20:40:24,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19025 to 11331. [2021-07-13 20:40:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11331 states, 11330 states have (on average 3.8080317740511913) internal successors, (43145), 11330 states have internal predecessors, (43145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:24,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11331 states to 11331 states and 43145 transitions. [2021-07-13 20:40:24,750 INFO L78 Accepts]: Start accepts. Automaton has 11331 states and 43145 transitions. Word has length 28 [2021-07-13 20:40:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:24,751 INFO L482 AbstractCegarLoop]: Abstraction has 11331 states and 43145 transitions. [2021-07-13 20:40:24,751 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) [2021-07-13 20:40:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 11331 states and 43145 transitions. [2021-07-13 20:40:24,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:24,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:24,771 INFO L508 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] [2021-07-13 20:40:24,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4062 [2021-07-13 20:40:24,972 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:24,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:24,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1691162673, now seen corresponding path program 98 times [2021-07-13 20:40:24,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:24,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423156699] [2021-07-13 20:40:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:25,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:25,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423156699] [2021-07-13 20:40:25,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423156699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:25,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179025907] [2021-07-13 20:40:25,008 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 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 [2021-07-13 20:40:25,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:25,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:25,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:25,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179025907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:25,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:25,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:40:25,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405288186] [2021-07-13 20:40:25,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:40:25,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:25,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:40:25,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:40:25,175 INFO L87 Difference]: Start difference. First operand 11331 states and 43145 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) [2021-07-13 20:40:26,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:26,630 INFO L93 Difference]: Finished difference Result 27696 states and 98852 transitions. [2021-07-13 20:40:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:40:26,630 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 [2021-07-13 20:40:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:26,721 INFO L225 Difference]: With dead ends: 27696 [2021-07-13 20:40:26,721 INFO L226 Difference]: Without dead ends: 27696 [2021-07-13 20:40:26,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2316 ImplicationChecksByTransitivity, 833.6ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:40:26,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27696 states. [2021-07-13 20:40:27,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27696 to 11621. [2021-07-13 20:40:27,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11621 states, 11620 states have (on average 3.831239242685026) internal successors, (44519), 11620 states have internal predecessors, (44519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:27,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11621 states to 11621 states and 44519 transitions. [2021-07-13 20:40:27,180 INFO L78 Accepts]: Start accepts. Automaton has 11621 states and 44519 transitions. Word has length 28 [2021-07-13 20:40:27,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:27,180 INFO L482 AbstractCegarLoop]: Abstraction has 11621 states and 44519 transitions. [2021-07-13 20:40:27,180 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) [2021-07-13 20:40:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 11621 states and 44519 transitions. [2021-07-13 20:40:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:27,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:27,201 INFO L508 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] [2021-07-13 20:40:27,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4063,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:27,401 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:27,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:27,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2036852543, now seen corresponding path program 99 times [2021-07-13 20:40:27,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:27,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457909008] [2021-07-13 20:40:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:27,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:27,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457909008] [2021-07-13 20:40:27,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457909008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:27,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780712482] [2021-07-13 20:40:27,439 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 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 [2021-07-13 20:40:27,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:40:27,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:27,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:27,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:27,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780712482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:27,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:27,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:40:27,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168342154] [2021-07-13 20:40:27,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:40:27,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:27,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:40:27,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:40:27,569 INFO L87 Difference]: Start difference. First operand 11621 states and 44519 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) [2021-07-13 20:40:28,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:28,911 INFO L93 Difference]: Finished difference Result 27229 states and 97782 transitions. [2021-07-13 20:40:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:40:28,912 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 [2021-07-13 20:40:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:29,095 INFO L225 Difference]: With dead ends: 27229 [2021-07-13 20:40:29,095 INFO L226 Difference]: Without dead ends: 27229 [2021-07-13 20:40:29,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 785.3ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:40:29,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27229 states. [2021-07-13 20:40:29,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27229 to 11523. [2021-07-13 20:40:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11523 states, 11522 states have (on average 3.819562575941677) internal successors, (44009), 11522 states have internal predecessors, (44009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:29,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11523 states to 11523 states and 44009 transitions. [2021-07-13 20:40:29,498 INFO L78 Accepts]: Start accepts. Automaton has 11523 states and 44009 transitions. Word has length 28 [2021-07-13 20:40:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:29,498 INFO L482 AbstractCegarLoop]: Abstraction has 11523 states and 44009 transitions. [2021-07-13 20:40:29,498 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) [2021-07-13 20:40:29,498 INFO L276 IsEmpty]: Start isEmpty. Operand 11523 states and 44009 transitions. [2021-07-13 20:40:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:29,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:29,519 INFO L508 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] [2021-07-13 20:40:29,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4064 [2021-07-13 20:40:29,719 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:29,720 INFO L82 PathProgramCache]: Analyzing trace with hash 197254951, now seen corresponding path program 100 times [2021-07-13 20:40:29,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:29,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818506339] [2021-07-13 20:40:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:29,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:29,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818506339] [2021-07-13 20:40:29,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818506339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:29,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143524967] [2021-07-13 20:40:29,756 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 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 [2021-07-13 20:40:29,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:29,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:29,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:29,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:29,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143524967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:29,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:29,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:40:29,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327524448] [2021-07-13 20:40:29,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:40:29,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:29,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:40:29,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:40:29,889 INFO L87 Difference]: Start difference. First operand 11523 states and 44009 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) [2021-07-13 20:40:30,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:30,817 INFO L93 Difference]: Finished difference Result 21512 states and 77611 transitions. [2021-07-13 20:40:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:40:30,817 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 [2021-07-13 20:40:30,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:30,882 INFO L225 Difference]: With dead ends: 21512 [2021-07-13 20:40:30,882 INFO L226 Difference]: Without dead ends: 21512 [2021-07-13 20:40:30,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:40:30,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21512 states. [2021-07-13 20:40:31,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21512 to 11532. [2021-07-13 20:40:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11532 states, 11531 states have (on average 3.8185760124880757) internal successors, (44032), 11531 states have internal predecessors, (44032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11532 states to 11532 states and 44032 transitions. [2021-07-13 20:40:31,333 INFO L78 Accepts]: Start accepts. Automaton has 11532 states and 44032 transitions. Word has length 28 [2021-07-13 20:40:31,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:31,333 INFO L482 AbstractCegarLoop]: Abstraction has 11532 states and 44032 transitions. [2021-07-13 20:40:31,333 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) [2021-07-13 20:40:31,333 INFO L276 IsEmpty]: Start isEmpty. Operand 11532 states and 44032 transitions. [2021-07-13 20:40:31,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:31,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:31,356 INFO L508 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] [2021-07-13 20:40:31,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-07-13 20:40:31,556 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:31,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:31,557 INFO L82 PathProgramCache]: Analyzing trace with hash -477466927, now seen corresponding path program 101 times [2021-07-13 20:40:31,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:31,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084812561] [2021-07-13 20:40:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:31,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:31,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084812561] [2021-07-13 20:40:31,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084812561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:31,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205135399] [2021-07-13 20:40:31,593 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 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 [2021-07-13 20:40:31,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:40:31,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:31,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:31,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:31,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205135399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:31,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:31,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:40:31,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65298782] [2021-07-13 20:40:31,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:40:31,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:31,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:40:31,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:40:31,717 INFO L87 Difference]: Start difference. First operand 11532 states and 44032 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) [2021-07-13 20:40:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:32,587 INFO L93 Difference]: Finished difference Result 19923 states and 72552 transitions. [2021-07-13 20:40:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:40:32,587 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 [2021-07-13 20:40:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:32,651 INFO L225 Difference]: With dead ends: 19923 [2021-07-13 20:40:32,651 INFO L226 Difference]: Without dead ends: 19923 [2021-07-13 20:40:32,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 448.4ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:40:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19923 states. [2021-07-13 20:40:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19923 to 11544. [2021-07-13 20:40:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11544 states, 11543 states have (on average 3.817898293337954) internal successors, (44070), 11543 states have internal predecessors, (44070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:33,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11544 states to 11544 states and 44070 transitions. [2021-07-13 20:40:33,019 INFO L78 Accepts]: Start accepts. Automaton has 11544 states and 44070 transitions. Word has length 28 [2021-07-13 20:40:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:33,019 INFO L482 AbstractCegarLoop]: Abstraction has 11544 states and 44070 transitions. [2021-07-13 20:40:33,019 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) [2021-07-13 20:40:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 11544 states and 44070 transitions. [2021-07-13 20:40:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:33,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:33,039 INFO L508 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] [2021-07-13 20:40:33,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-07-13 20:40:33,240 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:33,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893249, now seen corresponding path program 102 times [2021-07-13 20:40:33,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:33,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194291675] [2021-07-13 20:40:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:33,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:33,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194291675] [2021-07-13 20:40:33,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194291675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:33,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299345661] [2021-07-13 20:40:33,283 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 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 [2021-07-13 20:40:33,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:40:33,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:33,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:33,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:33,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299345661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:33,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:33,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:40:33,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555709885] [2021-07-13 20:40:33,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:40:33,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:33,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:40:33,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:40:33,415 INFO L87 Difference]: Start difference. First operand 11544 states and 44070 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) [2021-07-13 20:40:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:34,629 INFO L93 Difference]: Finished difference Result 20543 states and 74326 transitions. [2021-07-13 20:40:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:40:34,629 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 [2021-07-13 20:40:34,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:34,698 INFO L225 Difference]: With dead ends: 20543 [2021-07-13 20:40:34,699 INFO L226 Difference]: Without dead ends: 20543 [2021-07-13 20:40:34,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 759.8ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:40:34,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20543 states. [2021-07-13 20:40:35,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20543 to 11652. [2021-07-13 20:40:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11652 states, 11651 states have (on average 3.8111750064372156) internal successors, (44404), 11651 states have internal predecessors, (44404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11652 states to 11652 states and 44404 transitions. [2021-07-13 20:40:35,120 INFO L78 Accepts]: Start accepts. Automaton has 11652 states and 44404 transitions. Word has length 28 [2021-07-13 20:40:35,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:35,120 INFO L482 AbstractCegarLoop]: Abstraction has 11652 states and 44404 transitions. [2021-07-13 20:40:35,120 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) [2021-07-13 20:40:35,120 INFO L276 IsEmpty]: Start isEmpty. Operand 11652 states and 44404 transitions. [2021-07-13 20:40:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:35,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:35,140 INFO L508 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] [2021-07-13 20:40:35,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4067,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:35,340 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:35,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1476034893, now seen corresponding path program 103 times [2021-07-13 20:40:35,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:35,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111318731] [2021-07-13 20:40:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:35,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:35,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111318731] [2021-07-13 20:40:35,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111318731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:35,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053498065] [2021-07-13 20:40:35,377 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 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 [2021-07-13 20:40:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:35,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:35,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:35,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053498065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:35,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:35,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:40:35,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367153075] [2021-07-13 20:40:35,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:40:35,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:35,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:40:35,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:40:35,500 INFO L87 Difference]: Start difference. First operand 11652 states and 44404 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) [2021-07-13 20:40:36,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:36,473 INFO L93 Difference]: Finished difference Result 20102 states and 73128 transitions. [2021-07-13 20:40:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:40:36,473 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 [2021-07-13 20:40:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:36,607 INFO L225 Difference]: With dead ends: 20102 [2021-07-13 20:40:36,607 INFO L226 Difference]: Without dead ends: 20098 [2021-07-13 20:40:36,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 600.2ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:40:36,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20098 states. [2021-07-13 20:40:36,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20098 to 11578. [2021-07-13 20:40:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11578 states, 11577 states have (on average 3.814891595404682) internal successors, (44165), 11577 states have internal predecessors, (44165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11578 states to 11578 states and 44165 transitions. [2021-07-13 20:40:36,907 INFO L78 Accepts]: Start accepts. Automaton has 11578 states and 44165 transitions. Word has length 28 [2021-07-13 20:40:36,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:36,907 INFO L482 AbstractCegarLoop]: Abstraction has 11578 states and 44165 transitions. [2021-07-13 20:40:36,907 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) [2021-07-13 20:40:36,907 INFO L276 IsEmpty]: Start isEmpty. Operand 11578 states and 44165 transitions. [2021-07-13 20:40:36,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:36,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:36,927 INFO L508 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] [2021-07-13 20:40:37,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-07-13 20:40:37,127 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:37,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:37,128 INFO L82 PathProgramCache]: Analyzing trace with hash 729404223, now seen corresponding path program 104 times [2021-07-13 20:40:37,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:37,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852167078] [2021-07-13 20:40:37,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:37,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:37,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852167078] [2021-07-13 20:40:37,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852167078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:37,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696510348] [2021-07-13 20:40:37,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:40:37,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:37,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:37,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:37,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:37,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696510348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:37,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:37,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:40:37,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983484763] [2021-07-13 20:40:37,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:40:37,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:37,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:40:37,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:40:37,295 INFO L87 Difference]: Start difference. First operand 11578 states and 44165 transitions. Second operand has 16 states, 16 states have (on average 2.625) 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) [2021-07-13 20:40:38,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:38,467 INFO L93 Difference]: Finished difference Result 19515 states and 70543 transitions. [2021-07-13 20:40:38,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:40:38,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) 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 28 [2021-07-13 20:40:38,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:38,523 INFO L225 Difference]: With dead ends: 19515 [2021-07-13 20:40:38,524 INFO L226 Difference]: Without dead ends: 19515 [2021-07-13 20:40:38,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 691.5ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:40:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19515 states. [2021-07-13 20:40:38,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19515 to 11805. [2021-07-13 20:40:38,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11805 states, 11804 states have (on average 3.8176042019654353) internal successors, (45063), 11804 states have internal predecessors, (45063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:38,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11805 states to 11805 states and 45063 transitions. [2021-07-13 20:40:38,994 INFO L78 Accepts]: Start accepts. Automaton has 11805 states and 45063 transitions. Word has length 28 [2021-07-13 20:40:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:38,994 INFO L482 AbstractCegarLoop]: Abstraction has 11805 states and 45063 transitions. [2021-07-13 20:40:38,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) 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) [2021-07-13 20:40:38,994 INFO L276 IsEmpty]: Start isEmpty. Operand 11805 states and 45063 transitions. [2021-07-13 20:40:39,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:39,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:39,018 INFO L508 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] [2021-07-13 20:40:39,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:39,218 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:39,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:39,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1909723903, now seen corresponding path program 105 times [2021-07-13 20:40:39,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:39,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137783118] [2021-07-13 20:40:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:39,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:39,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137783118] [2021-07-13 20:40:39,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137783118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:39,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224113094] [2021-07-13 20:40:39,264 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 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 [2021-07-13 20:40:39,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:40:39,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:39,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:39,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:39,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224113094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:39,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:39,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:40:39,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324014421] [2021-07-13 20:40:39,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:40:39,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:39,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:40:39,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:40:39,393 INFO L87 Difference]: Start difference. First operand 11805 states and 45063 transitions. Second operand has 16 states, 16 states have (on average 2.625) 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) [2021-07-13 20:40:40,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:40,435 INFO L93 Difference]: Finished difference Result 19219 states and 69718 transitions. [2021-07-13 20:40:40,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:40:40,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) 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 28 [2021-07-13 20:40:40,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:40,493 INFO L225 Difference]: With dead ends: 19219 [2021-07-13 20:40:40,493 INFO L226 Difference]: Without dead ends: 19207 [2021-07-13 20:40:40,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 616.8ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:40:40,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19207 states. [2021-07-13 20:40:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19207 to 11907. [2021-07-13 20:40:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11907 states, 11906 states have (on average 3.81202754913489) internal successors, (45386), 11906 states have internal predecessors, (45386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11907 states to 11907 states and 45386 transitions. [2021-07-13 20:40:40,875 INFO L78 Accepts]: Start accepts. Automaton has 11907 states and 45386 transitions. Word has length 28 [2021-07-13 20:40:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:40,875 INFO L482 AbstractCegarLoop]: Abstraction has 11907 states and 45386 transitions. [2021-07-13 20:40:40,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) 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) [2021-07-13 20:40:40,875 INFO L276 IsEmpty]: Start isEmpty. Operand 11907 states and 45386 transitions. [2021-07-13 20:40:40,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:40,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:40,899 INFO L508 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] [2021-07-13 20:40:41,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-07-13 20:40:41,099 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:41,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1714650925, now seen corresponding path program 70 times [2021-07-13 20:40:41,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:41,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946000557] [2021-07-13 20:40:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:41,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:41,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946000557] [2021-07-13 20:40:41,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946000557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:41,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376093669] [2021-07-13 20:40:41,143 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 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 [2021-07-13 20:40:41,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:41,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:41,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:41,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:41,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376093669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:41,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:41,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:40:41,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899177772] [2021-07-13 20:40:41,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:40:41,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:41,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:40:41,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:40:41,234 INFO L87 Difference]: Start difference. First operand 11907 states and 45386 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) [2021-07-13 20:40:41,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:41,743 INFO L93 Difference]: Finished difference Result 16719 states and 62078 transitions. [2021-07-13 20:40:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:40:41,743 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 [2021-07-13 20:40:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:41,788 INFO L225 Difference]: With dead ends: 16719 [2021-07-13 20:40:41,788 INFO L226 Difference]: Without dead ends: 16719 [2021-07-13 20:40:41,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 265.6ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:40:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16719 states. [2021-07-13 20:40:42,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16719 to 11979. [2021-07-13 20:40:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11979 states, 11978 states have (on average 3.8078143262648187) internal successors, (45610), 11978 states have internal predecessors, (45610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:42,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11979 states to 11979 states and 45610 transitions. [2021-07-13 20:40:42,138 INFO L78 Accepts]: Start accepts. Automaton has 11979 states and 45610 transitions. Word has length 28 [2021-07-13 20:40:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:42,138 INFO L482 AbstractCegarLoop]: Abstraction has 11979 states and 45610 transitions. [2021-07-13 20:40:42,138 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) [2021-07-13 20:40:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 11979 states and 45610 transitions. [2021-07-13 20:40:42,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:42,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:42,158 INFO L508 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] [2021-07-13 20:40:42,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4071 [2021-07-13 20:40:42,359 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:42,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:42,359 INFO L82 PathProgramCache]: Analyzing trace with hash -55855667, now seen corresponding path program 71 times [2021-07-13 20:40:42,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:42,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142658961] [2021-07-13 20:40:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:42,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:42,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142658961] [2021-07-13 20:40:42,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142658961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:42,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393031471] [2021-07-13 20:40:42,396 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 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 [2021-07-13 20:40:42,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:40:42,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:42,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:42,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:42,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393031471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:42,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:42,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:40:42,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924701675] [2021-07-13 20:40:42,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:40:42,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:42,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:40:42,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:40:42,487 INFO L87 Difference]: Start difference. First operand 11979 states and 45610 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) [2021-07-13 20:40:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:43,044 INFO L93 Difference]: Finished difference Result 17700 states and 64924 transitions. [2021-07-13 20:40:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:40:43,044 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 [2021-07-13 20:40:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:43,093 INFO L225 Difference]: With dead ends: 17700 [2021-07-13 20:40:43,094 INFO L226 Difference]: Without dead ends: 17700 [2021-07-13 20:40:43,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 303.7ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:40:43,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17700 states. [2021-07-13 20:40:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17700 to 12313. [2021-07-13 20:40:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12313 states, 12312 states have (on average 3.790529564652372) internal successors, (46669), 12312 states have internal predecessors, (46669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12313 states to 12313 states and 46669 transitions. [2021-07-13 20:40:43,427 INFO L78 Accepts]: Start accepts. Automaton has 12313 states and 46669 transitions. Word has length 28 [2021-07-13 20:40:43,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:43,427 INFO L482 AbstractCegarLoop]: Abstraction has 12313 states and 46669 transitions. [2021-07-13 20:40:43,428 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) [2021-07-13 20:40:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 12313 states and 46669 transitions. [2021-07-13 20:40:43,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:43,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:43,449 INFO L508 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] [2021-07-13 20:40:43,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4072,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:43,649 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash -100676809, now seen corresponding path program 72 times [2021-07-13 20:40:43,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:43,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609322415] [2021-07-13 20:40:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:43,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:43,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609322415] [2021-07-13 20:40:43,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609322415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:43,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033546991] [2021-07-13 20:40:43,687 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 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 [2021-07-13 20:40:43,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:40:43,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:43,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:43,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:43,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033546991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:43,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:43,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:40:43,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715081573] [2021-07-13 20:40:43,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:40:43,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:43,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:40:43,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:40:43,776 INFO L87 Difference]: Start difference. First operand 12313 states and 46669 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) [2021-07-13 20:40:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:44,248 INFO L93 Difference]: Finished difference Result 17190 states and 63587 transitions. [2021-07-13 20:40:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:40:44,248 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 [2021-07-13 20:40:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:44,298 INFO L225 Difference]: With dead ends: 17190 [2021-07-13 20:40:44,298 INFO L226 Difference]: Without dead ends: 17182 [2021-07-13 20:40:44,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:40:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17182 states. [2021-07-13 20:40:44,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17182 to 12253. [2021-07-13 20:40:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12253 states, 12252 states have (on average 3.7924420502775056) internal successors, (46465), 12252 states have internal predecessors, (46465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12253 states to 12253 states and 46465 transitions. [2021-07-13 20:40:44,689 INFO L78 Accepts]: Start accepts. Automaton has 12253 states and 46465 transitions. Word has length 28 [2021-07-13 20:40:44,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:44,689 INFO L482 AbstractCegarLoop]: Abstraction has 12253 states and 46465 transitions. [2021-07-13 20:40:44,689 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) [2021-07-13 20:40:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand 12253 states and 46465 transitions. [2021-07-13 20:40:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:44,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:44,711 INFO L508 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] [2021-07-13 20:40:44,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4073 [2021-07-13 20:40:44,911 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:44,912 INFO L82 PathProgramCache]: Analyzing trace with hash 496659849, now seen corresponding path program 73 times [2021-07-13 20:40:44,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:44,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874260070] [2021-07-13 20:40:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:44,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:44,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874260070] [2021-07-13 20:40:44,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874260070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:44,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192486012] [2021-07-13 20:40:44,953 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 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 [2021-07-13 20:40:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:44,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:44,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:45,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192486012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:45,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:45,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:40:45,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231247527] [2021-07-13 20:40:45,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:40:45,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:45,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:40:45,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:40:45,040 INFO L87 Difference]: Start difference. First operand 12253 states and 46465 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) [2021-07-13 20:40:45,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:45,555 INFO L93 Difference]: Finished difference Result 17090 states and 63299 transitions. [2021-07-13 20:40:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:40:45,555 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 [2021-07-13 20:40:45,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:45,605 INFO L225 Difference]: With dead ends: 17090 [2021-07-13 20:40:45,606 INFO L226 Difference]: Without dead ends: 17078 [2021-07-13 20:40:45,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:40:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17078 states. [2021-07-13 20:40:45,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17078 to 12219. [2021-07-13 20:40:45,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12219 states, 12218 states have (on average 3.7944017024062857) internal successors, (46360), 12218 states have internal predecessors, (46360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12219 states to 12219 states and 46360 transitions. [2021-07-13 20:40:45,946 INFO L78 Accepts]: Start accepts. Automaton has 12219 states and 46360 transitions. Word has length 28 [2021-07-13 20:40:45,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:45,947 INFO L482 AbstractCegarLoop]: Abstraction has 12219 states and 46360 transitions. [2021-07-13 20:40:45,947 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) [2021-07-13 20:40:45,947 INFO L276 IsEmpty]: Start isEmpty. Operand 12219 states and 46360 transitions. [2021-07-13 20:40:45,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:45,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:45,970 INFO L508 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] [2021-07-13 20:40:46,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4074,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:46,171 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:46,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:46,171 INFO L82 PathProgramCache]: Analyzing trace with hash -158749623, now seen corresponding path program 74 times [2021-07-13 20:40:46,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:46,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495620404] [2021-07-13 20:40:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:46,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:46,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495620404] [2021-07-13 20:40:46,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495620404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:46,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600231442] [2021-07-13 20:40:46,214 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 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 [2021-07-13 20:40:46,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:46,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:46,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:46,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:46,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600231442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:46,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:46,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:40:46,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538706631] [2021-07-13 20:40:46,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:40:46,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:46,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:40:46,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:40:46,364 INFO L87 Difference]: Start difference. First operand 12219 states and 46360 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) [2021-07-13 20:40:47,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:47,674 INFO L93 Difference]: Finished difference Result 23045 states and 82416 transitions. [2021-07-13 20:40:47,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:40:47,675 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 [2021-07-13 20:40:47,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:47,759 INFO L225 Difference]: With dead ends: 23045 [2021-07-13 20:40:47,759 INFO L226 Difference]: Without dead ends: 23045 [2021-07-13 20:40:47,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 691.1ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:40:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23045 states. [2021-07-13 20:40:48,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23045 to 12201. [2021-07-13 20:40:48,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12201 states, 12200 states have (on average 3.7931967213114755) internal successors, (46277), 12200 states have internal predecessors, (46277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:48,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12201 states to 12201 states and 46277 transitions. [2021-07-13 20:40:48,385 INFO L78 Accepts]: Start accepts. Automaton has 12201 states and 46277 transitions. Word has length 28 [2021-07-13 20:40:48,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:48,385 INFO L482 AbstractCegarLoop]: Abstraction has 12201 states and 46277 transitions. [2021-07-13 20:40:48,385 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) [2021-07-13 20:40:48,385 INFO L276 IsEmpty]: Start isEmpty. Operand 12201 states and 46277 transitions. [2021-07-13 20:40:48,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:48,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:48,408 INFO L508 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] [2021-07-13 20:40:48,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4075,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:48,609 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:48,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:48,610 INFO L82 PathProgramCache]: Analyzing trace with hash 368022285, now seen corresponding path program 106 times [2021-07-13 20:40:48,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:48,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393009415] [2021-07-13 20:40:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:48,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:48,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393009415] [2021-07-13 20:40:48,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393009415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:48,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960717063] [2021-07-13 20:40:48,642 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 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 [2021-07-13 20:40:48,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:40:48,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:48,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:40:48,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:48,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960717063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:48,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:48,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:40:48,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309046076] [2021-07-13 20:40:48,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:40:48,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:48,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:40:48,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:40:48,776 INFO L87 Difference]: Start difference. First operand 12201 states and 46277 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) [2021-07-13 20:40:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:49,785 INFO L93 Difference]: Finished difference Result 18822 states and 68098 transitions. [2021-07-13 20:40:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:40:49,785 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 [2021-07-13 20:40:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:49,853 INFO L225 Difference]: With dead ends: 18822 [2021-07-13 20:40:49,854 INFO L226 Difference]: Without dead ends: 18806 [2021-07-13 20:40:49,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 504.6ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:40:49,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18806 states. [2021-07-13 20:40:50,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18806 to 13509. [2021-07-13 20:40:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13509 states, 13508 states have (on average 3.85475273911756) internal successors, (52070), 13508 states have internal predecessors, (52070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13509 states to 13509 states and 52070 transitions. [2021-07-13 20:40:50,318 INFO L78 Accepts]: Start accepts. Automaton has 13509 states and 52070 transitions. Word has length 28 [2021-07-13 20:40:50,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:50,318 INFO L482 AbstractCegarLoop]: Abstraction has 13509 states and 52070 transitions. [2021-07-13 20:40:50,318 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) [2021-07-13 20:40:50,318 INFO L276 IsEmpty]: Start isEmpty. Operand 13509 states and 52070 transitions. [2021-07-13 20:40:50,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:50,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:50,348 INFO L508 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] [2021-07-13 20:40:50,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-07-13 20:40:50,569 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:50,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:50,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1040435067, now seen corresponding path program 107 times [2021-07-13 20:40:50,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:50,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257218894] [2021-07-13 20:40:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:40:50,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:50,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257218894] [2021-07-13 20:40:50,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257218894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:50,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841519093] [2021-07-13 20:40:50,604 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 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 [2021-07-13 20:40:50,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:40:50,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:50,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:40:50,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:50,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841519093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:50,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:50,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:40:50,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250697511] [2021-07-13 20:40:50,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:40:50,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:50,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:40:50,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:40:50,741 INFO L87 Difference]: Start difference. First operand 13509 states and 52070 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) [2021-07-13 20:40:51,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:51,938 INFO L93 Difference]: Finished difference Result 18923 states and 68358 transitions. [2021-07-13 20:40:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:40:51,939 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 [2021-07-13 20:40:51,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:52,000 INFO L225 Difference]: With dead ends: 18923 [2021-07-13 20:40:52,000 INFO L226 Difference]: Without dead ends: 18917 [2021-07-13 20:40:52,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:40:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18917 states. [2021-07-13 20:40:52,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18917 to 13479. [2021-07-13 20:40:52,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13478 states have (on average 3.8540584656477224) internal successors, (51945), 13478 states have internal predecessors, (51945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 51945 transitions. [2021-07-13 20:40:52,479 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 51945 transitions. Word has length 28 [2021-07-13 20:40:52,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:52,479 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 51945 transitions. [2021-07-13 20:40:52,479 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) [2021-07-13 20:40:52,479 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 51945 transitions. [2021-07-13 20:40:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:52,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:52,512 INFO L508 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] [2021-07-13 20:40:52,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4077,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:40:52,733 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:52,734 INFO L82 PathProgramCache]: Analyzing trace with hash -774903755, now seen corresponding path program 108 times [2021-07-13 20:40:52,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:52,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532693804] [2021-07-13 20:40:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:52,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:52,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532693804] [2021-07-13 20:40:52,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532693804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:52,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5759165] [2021-07-13 20:40:52,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:40:52,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:40:52,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:52,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:40:52,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:52,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5759165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:52,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:52,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:40:52,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675351589] [2021-07-13 20:40:52,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:40:52,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:52,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:40:52,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:40:52,892 INFO L87 Difference]: Start difference. First operand 13479 states and 51945 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) [2021-07-13 20:40:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:53,789 INFO L93 Difference]: Finished difference Result 21275 states and 76975 transitions. [2021-07-13 20:40:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:40:53,789 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 [2021-07-13 20:40:53,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:53,857 INFO L225 Difference]: With dead ends: 21275 [2021-07-13 20:40:53,857 INFO L226 Difference]: Without dead ends: 21259 [2021-07-13 20:40:53,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 444.5ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:40:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21259 states. [2021-07-13 20:40:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21259 to 13567. [2021-07-13 20:40:54,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13567 states, 13566 states have (on average 3.861270824119121) internal successors, (52382), 13566 states have internal predecessors, (52382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13567 states to 13567 states and 52382 transitions. [2021-07-13 20:40:54,368 INFO L78 Accepts]: Start accepts. Automaton has 13567 states and 52382 transitions. Word has length 28 [2021-07-13 20:40:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:54,369 INFO L482 AbstractCegarLoop]: Abstraction has 13567 states and 52382 transitions. [2021-07-13 20:40:54,369 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) [2021-07-13 20:40:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 13567 states and 52382 transitions. [2021-07-13 20:40:54,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:54,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:54,558 INFO L508 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] [2021-07-13 20:40:54,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-07-13 20:40:54,759 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:54,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1457648085, now seen corresponding path program 109 times [2021-07-13 20:40:54,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:54,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941618768] [2021-07-13 20:40:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:54,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:54,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941618768] [2021-07-13 20:40:54,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941618768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:54,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343332420] [2021-07-13 20:40:54,795 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 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 [2021-07-13 20:40:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:54,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:40:54,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:54,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343332420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:54,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:54,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:40:54,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42928988] [2021-07-13 20:40:54,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:40:54,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:54,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:40:54,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:40:54,931 INFO L87 Difference]: Start difference. First operand 13567 states and 52382 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) [2021-07-13 20:40:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:55,940 INFO L93 Difference]: Finished difference Result 22620 states and 81208 transitions. [2021-07-13 20:40:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:40:55,941 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 [2021-07-13 20:40:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:56,028 INFO L225 Difference]: With dead ends: 22620 [2021-07-13 20:40:56,028 INFO L226 Difference]: Without dead ends: 22620 [2021-07-13 20:40:56,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 535.7ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:40:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22620 states. [2021-07-13 20:40:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22620 to 13595. [2021-07-13 20:40:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13595 states, 13594 states have (on average 3.8592761512431957) internal successors, (52463), 13594 states have internal predecessors, (52463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13595 states to 13595 states and 52463 transitions. [2021-07-13 20:40:56,558 INFO L78 Accepts]: Start accepts. Automaton has 13595 states and 52463 transitions. Word has length 28 [2021-07-13 20:40:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:56,558 INFO L482 AbstractCegarLoop]: Abstraction has 13595 states and 52463 transitions. [2021-07-13 20:40:56,558 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) [2021-07-13 20:40:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 13595 states and 52463 transitions. [2021-07-13 20:40:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:56,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:56,589 INFO L508 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] [2021-07-13 20:40:56,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-07-13 20:40:56,809 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:56,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1381492369, now seen corresponding path program 75 times [2021-07-13 20:40:56,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:56,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90494411] [2021-07-13 20:40:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:56,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:56,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90494411] [2021-07-13 20:40:56,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90494411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:56,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277324240] [2021-07-13 20:40:56,851 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 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 [2021-07-13 20:40:56,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:40:56,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:56,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:40:56,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:57,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277324240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:57,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:57,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:40:57,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012039654] [2021-07-13 20:40:57,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:40:57,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:57,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:40:57,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:40:57,194 INFO L87 Difference]: Start difference. First operand 13595 states and 52463 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) [2021-07-13 20:40:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:40:58,515 INFO L93 Difference]: Finished difference Result 23180 states and 85433 transitions. [2021-07-13 20:40:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:40:58,516 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 [2021-07-13 20:40:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:40:58,577 INFO L225 Difference]: With dead ends: 23180 [2021-07-13 20:40:58,577 INFO L226 Difference]: Without dead ends: 23176 [2021-07-13 20:40:58,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 998.5ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:40:58,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23176 states. [2021-07-13 20:40:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23176 to 13849. [2021-07-13 20:40:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13849 states, 13848 states have (on average 3.849364529173888) internal successors, (53306), 13848 states have internal predecessors, (53306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:40:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13849 states to 13849 states and 53306 transitions. [2021-07-13 20:40:59,044 INFO L78 Accepts]: Start accepts. Automaton has 13849 states and 53306 transitions. Word has length 28 [2021-07-13 20:40:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:40:59,044 INFO L482 AbstractCegarLoop]: Abstraction has 13849 states and 53306 transitions. [2021-07-13 20:40:59,044 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) [2021-07-13 20:40:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 13849 states and 53306 transitions. [2021-07-13 20:40:59,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:40:59,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:40:59,070 INFO L508 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] [2021-07-13 20:40:59,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4080 [2021-07-13 20:40:59,271 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:40:59,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:40:59,271 INFO L82 PathProgramCache]: Analyzing trace with hash -516108431, now seen corresponding path program 110 times [2021-07-13 20:40:59,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:40:59,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156020853] [2021-07-13 20:40:59,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:40:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:40:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:59,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:40:59,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156020853] [2021-07-13 20:40:59,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156020853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:59,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050527819] [2021-07-13 20:40:59,366 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 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 [2021-07-13 20:40:59,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:40:59,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:40:59,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:40:59,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:40:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:40:59,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050527819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:40:59,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:40:59,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:40:59,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121895609] [2021-07-13 20:40:59,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:40:59,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:40:59,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:40:59,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:40:59,460 INFO L87 Difference]: Start difference. First operand 13849 states and 53306 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) [2021-07-13 20:41:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:00,167 INFO L93 Difference]: Finished difference Result 20157 states and 74048 transitions. [2021-07-13 20:41:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:41:00,168 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 [2021-07-13 20:41:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:00,224 INFO L225 Difference]: With dead ends: 20157 [2021-07-13 20:41:00,224 INFO L226 Difference]: Without dead ends: 20131 [2021-07-13 20:41:00,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:41:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20131 states. [2021-07-13 20:41:00,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20131 to 13251. [2021-07-13 20:41:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13251 states, 13250 states have (on average 3.8595471698113206) internal successors, (51139), 13250 states have internal predecessors, (51139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13251 states to 13251 states and 51139 transitions. [2021-07-13 20:41:00,598 INFO L78 Accepts]: Start accepts. Automaton has 13251 states and 51139 transitions. Word has length 28 [2021-07-13 20:41:00,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:00,598 INFO L482 AbstractCegarLoop]: Abstraction has 13251 states and 51139 transitions. [2021-07-13 20:41:00,599 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) [2021-07-13 20:41:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 13251 states and 51139 transitions. [2021-07-13 20:41:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:00,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:00,682 INFO L508 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] [2021-07-13 20:41:00,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:00,882 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:00,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:00,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1198852761, now seen corresponding path program 111 times [2021-07-13 20:41:00,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:00,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021777354] [2021-07-13 20:41:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:00,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:00,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021777354] [2021-07-13 20:41:00,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021777354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:00,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527009274] [2021-07-13 20:41:00,920 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 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 [2021-07-13 20:41:00,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:00,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:00,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:00,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:01,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527009274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:01,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:01,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:01,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591755811] [2021-07-13 20:41:01,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:01,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:01,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:01,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:01,019 INFO L87 Difference]: Start difference. First operand 13251 states and 51139 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) [2021-07-13 20:41:01,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:01,838 INFO L93 Difference]: Finished difference Result 19214 states and 69517 transitions. [2021-07-13 20:41:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:41:01,839 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 [2021-07-13 20:41:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:01,892 INFO L225 Difference]: With dead ends: 19214 [2021-07-13 20:41:01,892 INFO L226 Difference]: Without dead ends: 19214 [2021-07-13 20:41:01,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 476.0ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:41:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19214 states. [2021-07-13 20:41:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19214 to 13464. [2021-07-13 20:41:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13464 states, 13463 states have (on average 3.854935749832875) internal successors, (51899), 13463 states have internal predecessors, (51899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:02,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13464 states to 13464 states and 51899 transitions. [2021-07-13 20:41:02,361 INFO L78 Accepts]: Start accepts. Automaton has 13464 states and 51899 transitions. Word has length 28 [2021-07-13 20:41:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:02,361 INFO L482 AbstractCegarLoop]: Abstraction has 13464 states and 51899 transitions. [2021-07-13 20:41:02,361 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) [2021-07-13 20:41:02,362 INFO L276 IsEmpty]: Start isEmpty. Operand 13464 states and 51899 transitions. [2021-07-13 20:41:02,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:02,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:02,386 INFO L508 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] [2021-07-13 20:41:02,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4082,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:02,587 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:02,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:02,587 INFO L82 PathProgramCache]: Analyzing trace with hash -674876415, now seen corresponding path program 112 times [2021-07-13 20:41:02,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:02,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688852516] [2021-07-13 20:41:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:02,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:02,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688852516] [2021-07-13 20:41:02,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688852516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:02,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519595772] [2021-07-13 20:41:02,620 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 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 [2021-07-13 20:41:02,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:02,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:02,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:02,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:02,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519595772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:02,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:02,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:41:02,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191369341] [2021-07-13 20:41:02,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:02,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:02,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:02,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:02,720 INFO L87 Difference]: Start difference. First operand 13464 states and 51899 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) [2021-07-13 20:41:03,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:03,527 INFO L93 Difference]: Finished difference Result 20483 states and 74562 transitions. [2021-07-13 20:41:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:41:03,528 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 [2021-07-13 20:41:03,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:03,593 INFO L225 Difference]: With dead ends: 20483 [2021-07-13 20:41:03,593 INFO L226 Difference]: Without dead ends: 20483 [2021-07-13 20:41:03,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:41:03,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20483 states. [2021-07-13 20:41:04,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20483 to 14177. [2021-07-13 20:41:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.8409988713318284) internal successors, (54450), 14176 states have internal predecessors, (54450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 54450 transitions. [2021-07-13 20:41:04,095 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 54450 transitions. Word has length 28 [2021-07-13 20:41:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:04,096 INFO L482 AbstractCegarLoop]: Abstraction has 14177 states and 54450 transitions. [2021-07-13 20:41:04,096 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) [2021-07-13 20:41:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 54450 transitions. [2021-07-13 20:41:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:04,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:04,125 INFO L508 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] [2021-07-13 20:41:04,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4083 [2021-07-13 20:41:04,325 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:04,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:04,325 INFO L82 PathProgramCache]: Analyzing trace with hash 78789957, now seen corresponding path program 113 times [2021-07-13 20:41:04,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:04,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542765346] [2021-07-13 20:41:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:04,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:04,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542765346] [2021-07-13 20:41:04,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542765346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:04,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102477100] [2021-07-13 20:41:04,358 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 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 [2021-07-13 20:41:04,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:41:04,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:04,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:04,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:04,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102477100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:04,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:04,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:41:04,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138625449] [2021-07-13 20:41:04,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:41:04,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:04,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:41:04,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:04,459 INFO L87 Difference]: Start difference. First operand 14177 states and 54450 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) [2021-07-13 20:41:05,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:05,436 INFO L93 Difference]: Finished difference Result 22983 states and 82487 transitions. [2021-07-13 20:41:05,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:41:05,437 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 [2021-07-13 20:41:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:05,496 INFO L225 Difference]: With dead ends: 22983 [2021-07-13 20:41:05,496 INFO L226 Difference]: Without dead ends: 22983 [2021-07-13 20:41:05,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 484.9ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:41:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22983 states. [2021-07-13 20:41:05,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22983 to 14420. [2021-07-13 20:41:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14420 states, 14419 states have (on average 3.8541507732852485) internal successors, (55573), 14419 states have internal predecessors, (55573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14420 states to 14420 states and 55573 transitions. [2021-07-13 20:41:05,964 INFO L78 Accepts]: Start accepts. Automaton has 14420 states and 55573 transitions. Word has length 28 [2021-07-13 20:41:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:05,964 INFO L482 AbstractCegarLoop]: Abstraction has 14420 states and 55573 transitions. [2021-07-13 20:41:05,964 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) [2021-07-13 20:41:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 14420 states and 55573 transitions. [2021-07-13 20:41:05,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:05,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:05,989 INFO L508 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] [2021-07-13 20:41:06,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4084,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:06,191 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:06,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:06,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1952101299, now seen corresponding path program 76 times [2021-07-13 20:41:06,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:06,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256371801] [2021-07-13 20:41:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:06,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:06,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256371801] [2021-07-13 20:41:06,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256371801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:06,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923640803] [2021-07-13 20:41:06,228 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 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 [2021-07-13 20:41:06,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:06,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:06,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:06,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:06,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923640803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:06,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:06,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:41:06,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019698776] [2021-07-13 20:41:06,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:06,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:06,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:06,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:06,357 INFO L87 Difference]: Start difference. First operand 14420 states and 55573 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) [2021-07-13 20:41:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:08,233 INFO L93 Difference]: Finished difference Result 39692 states and 142842 transitions. [2021-07-13 20:41:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:41:08,233 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 [2021-07-13 20:41:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:08,356 INFO L225 Difference]: With dead ends: 39692 [2021-07-13 20:41:08,356 INFO L226 Difference]: Without dead ends: 39692 [2021-07-13 20:41:08,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 1073.2ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:41:08,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39692 states. [2021-07-13 20:41:09,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39692 to 15659. [2021-07-13 20:41:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15659 states, 15658 states have (on average 3.899093115340401) internal successors, (61052), 15658 states have internal predecessors, (61052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:09,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15659 states to 15659 states and 61052 transitions. [2021-07-13 20:41:09,185 INFO L78 Accepts]: Start accepts. Automaton has 15659 states and 61052 transitions. Word has length 28 [2021-07-13 20:41:09,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:09,185 INFO L482 AbstractCegarLoop]: Abstraction has 15659 states and 61052 transitions. [2021-07-13 20:41:09,185 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) [2021-07-13 20:41:09,185 INFO L276 IsEmpty]: Start isEmpty. Operand 15659 states and 61052 transitions. [2021-07-13 20:41:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:09,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:09,215 INFO L508 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] [2021-07-13 20:41:09,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4085 [2021-07-13 20:41:09,417 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:09,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:09,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1385149219, now seen corresponding path program 77 times [2021-07-13 20:41:09,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:09,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434135606] [2021-07-13 20:41:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:09,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:09,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434135606] [2021-07-13 20:41:09,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434135606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:09,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044989174] [2021-07-13 20:41:09,459 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 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 [2021-07-13 20:41:09,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:41:09,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:09,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:09,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:09,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044989174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:09,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:09,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:41:09,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310718607] [2021-07-13 20:41:09,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:09,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:09,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:09,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:09,589 INFO L87 Difference]: Start difference. First operand 15659 states and 61052 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) [2021-07-13 20:41:11,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:11,352 INFO L93 Difference]: Finished difference Result 38708 states and 140253 transitions. [2021-07-13 20:41:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:41:11,352 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 [2021-07-13 20:41:11,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:11,475 INFO L225 Difference]: With dead ends: 38708 [2021-07-13 20:41:11,475 INFO L226 Difference]: Without dead ends: 38708 [2021-07-13 20:41:11,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 1040.0ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:41:11,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38708 states. [2021-07-13 20:41:12,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38708 to 15633. [2021-07-13 20:41:12,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15633 states, 15632 states have (on average 3.895598771750256) internal successors, (60896), 15632 states have internal predecessors, (60896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15633 states to 15633 states and 60896 transitions. [2021-07-13 20:41:12,226 INFO L78 Accepts]: Start accepts. Automaton has 15633 states and 60896 transitions. Word has length 28 [2021-07-13 20:41:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:12,226 INFO L482 AbstractCegarLoop]: Abstraction has 15633 states and 60896 transitions. [2021-07-13 20:41:12,227 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) [2021-07-13 20:41:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 15633 states and 60896 transitions. [2021-07-13 20:41:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:12,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:12,378 INFO L508 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] [2021-07-13 20:41:12,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4086 [2021-07-13 20:41:12,593 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:12,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:12,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1667375567, now seen corresponding path program 114 times [2021-07-13 20:41:12,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:12,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824476] [2021-07-13 20:41:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:12,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:12,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824476] [2021-07-13 20:41:12,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:12,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629745499] [2021-07-13 20:41:12,629 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 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 [2021-07-13 20:41:12,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:41:12,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:12,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:12,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:12,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629745499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:12,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:12,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:41:12,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514248967] [2021-07-13 20:41:12,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:41:12,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:12,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:41:12,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:41:12,713 INFO L87 Difference]: Start difference. First operand 15633 states and 60896 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) [2021-07-13 20:41:13,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:13,019 INFO L93 Difference]: Finished difference Result 24061 states and 92296 transitions. [2021-07-13 20:41:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:41:13,019 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 [2021-07-13 20:41:13,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:13,087 INFO L225 Difference]: With dead ends: 24061 [2021-07-13 20:41:13,087 INFO L226 Difference]: Without dead ends: 24014 [2021-07-13 20:41:13,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:41:13,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24014 states. [2021-07-13 20:41:13,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24014 to 20722. [2021-07-13 20:41:13,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20722 states, 20721 states have (on average 3.9071473384489166) internal successors, (80960), 20721 states have internal predecessors, (80960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20722 states to 20722 states and 80960 transitions. [2021-07-13 20:41:13,787 INFO L78 Accepts]: Start accepts. Automaton has 20722 states and 80960 transitions. Word has length 28 [2021-07-13 20:41:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:13,787 INFO L482 AbstractCegarLoop]: Abstraction has 20722 states and 80960 transitions. [2021-07-13 20:41:13,787 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) [2021-07-13 20:41:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand 20722 states and 80960 transitions. [2021-07-13 20:41:13,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:13,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:13,824 INFO L508 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] [2021-07-13 20:41:14,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4087,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:14,024 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:14,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:14,025 INFO L82 PathProgramCache]: Analyzing trace with hash 242691175, now seen corresponding path program 115 times [2021-07-13 20:41:14,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:14,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154824643] [2021-07-13 20:41:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:14,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:14,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154824643] [2021-07-13 20:41:14,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154824643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:14,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155853542] [2021-07-13 20:41:14,054 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 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 [2021-07-13 20:41:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:14,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:14,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:14,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155853542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:14,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:14,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:41:14,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021245582] [2021-07-13 20:41:14,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:14,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:14,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:14,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:14,140 INFO L87 Difference]: Start difference. First operand 20722 states and 80960 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) [2021-07-13 20:41:14,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:14,532 INFO L93 Difference]: Finished difference Result 23493 states and 89383 transitions. [2021-07-13 20:41:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:41:14,532 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 [2021-07-13 20:41:14,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:14,604 INFO L225 Difference]: With dead ends: 23493 [2021-07-13 20:41:14,604 INFO L226 Difference]: Without dead ends: 23493 [2021-07-13 20:41:14,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23493 states. [2021-07-13 20:41:15,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23493 to 20225. [2021-07-13 20:41:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20225 states, 20224 states have (on average 3.895767405063291) internal successors, (78788), 20224 states have internal predecessors, (78788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20225 states to 20225 states and 78788 transitions. [2021-07-13 20:41:15,182 INFO L78 Accepts]: Start accepts. Automaton has 20225 states and 78788 transitions. Word has length 28 [2021-07-13 20:41:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:15,182 INFO L482 AbstractCegarLoop]: Abstraction has 20225 states and 78788 transitions. [2021-07-13 20:41:15,182 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) [2021-07-13 20:41:15,182 INFO L276 IsEmpty]: Start isEmpty. Operand 20225 states and 78788 transitions. [2021-07-13 20:41:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:15,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:15,217 INFO L508 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] [2021-07-13 20:41:15,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-07-13 20:41:15,417 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:15,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:15,418 INFO L82 PathProgramCache]: Analyzing trace with hash -708990263, now seen corresponding path program 116 times [2021-07-13 20:41:15,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:15,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564862342] [2021-07-13 20:41:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:15,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:15,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564862342] [2021-07-13 20:41:15,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564862342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:15,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567921533] [2021-07-13 20:41:15,457 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 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 [2021-07-13 20:41:15,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:15,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:15,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567921533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:15,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:15,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:41:15,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376342651] [2021-07-13 20:41:15,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:41:15,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:15,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:41:15,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:41:15,567 INFO L87 Difference]: Start difference. First operand 20225 states and 78788 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) [2021-07-13 20:41:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:16,660 INFO L93 Difference]: Finished difference Result 32091 states and 118994 transitions. [2021-07-13 20:41:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:41:16,661 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 [2021-07-13 20:41:16,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:16,753 INFO L225 Difference]: With dead ends: 32091 [2021-07-13 20:41:16,753 INFO L226 Difference]: Without dead ends: 32091 [2021-07-13 20:41:16,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:41:16,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32091 states. [2021-07-13 20:41:17,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32091 to 20291. [2021-07-13 20:41:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20291 states, 20290 states have (on average 3.8938393297190736) internal successors, (79006), 20290 states have internal predecessors, (79006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:17,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20291 states to 20291 states and 79006 transitions. [2021-07-13 20:41:17,474 INFO L78 Accepts]: Start accepts. Automaton has 20291 states and 79006 transitions. Word has length 28 [2021-07-13 20:41:17,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:17,474 INFO L482 AbstractCegarLoop]: Abstraction has 20291 states and 79006 transitions. [2021-07-13 20:41:17,474 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) [2021-07-13 20:41:17,475 INFO L276 IsEmpty]: Start isEmpty. Operand 20291 states and 79006 transitions. [2021-07-13 20:41:17,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:17,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:17,513 INFO L508 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] [2021-07-13 20:41:17,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-07-13 20:41:17,713 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:17,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:17,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1685309107, now seen corresponding path program 117 times [2021-07-13 20:41:17,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:17,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255627976] [2021-07-13 20:41:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:17,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:17,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255627976] [2021-07-13 20:41:17,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255627976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:17,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395834492] [2021-07-13 20:41:17,755 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 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 [2021-07-13 20:41:17,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:41:17,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:17,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:17,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:17,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395834492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:17,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:17,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:41:17,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321263096] [2021-07-13 20:41:17,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:17,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:17,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:17,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:17,886 INFO L87 Difference]: Start difference. First operand 20291 states and 79006 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) [2021-07-13 20:41:19,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:19,614 INFO L93 Difference]: Finished difference Result 40978 states and 150264 transitions. [2021-07-13 20:41:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:41:19,615 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 [2021-07-13 20:41:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:19,746 INFO L225 Difference]: With dead ends: 40978 [2021-07-13 20:41:19,746 INFO L226 Difference]: Without dead ends: 40978 [2021-07-13 20:41:19,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 1083.5ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:41:19,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40978 states. [2021-07-13 20:41:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40978 to 20294. [2021-07-13 20:41:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20294 states, 20293 states have (on average 3.895924703099591) internal successors, (79060), 20293 states have internal predecessors, (79060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20294 states to 20294 states and 79060 transitions. [2021-07-13 20:41:20,566 INFO L78 Accepts]: Start accepts. Automaton has 20294 states and 79060 transitions. Word has length 28 [2021-07-13 20:41:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:20,566 INFO L482 AbstractCegarLoop]: Abstraction has 20294 states and 79060 transitions. [2021-07-13 20:41:20,566 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) [2021-07-13 20:41:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 20294 states and 79060 transitions. [2021-07-13 20:41:20,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:20,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:20,605 INFO L508 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] [2021-07-13 20:41:20,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4090 [2021-07-13 20:41:20,806 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:20,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:20,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1118357027, now seen corresponding path program 118 times [2021-07-13 20:41:20,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:20,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906081106] [2021-07-13 20:41:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:20,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:20,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906081106] [2021-07-13 20:41:20,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906081106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:20,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824089335] [2021-07-13 20:41:20,844 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 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 [2021-07-13 20:41:20,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:20,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:20,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:20,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:20,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824089335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:20,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:20,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:41:20,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751393443] [2021-07-13 20:41:20,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:41:20,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:20,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:41:20,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:41:20,965 INFO L87 Difference]: Start difference. First operand 20294 states and 79060 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) [2021-07-13 20:41:22,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:22,859 INFO L93 Difference]: Finished difference Result 40582 states and 149545 transitions. [2021-07-13 20:41:22,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:41:22,859 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 [2021-07-13 20:41:22,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:22,993 INFO L225 Difference]: With dead ends: 40582 [2021-07-13 20:41:22,993 INFO L226 Difference]: Without dead ends: 40582 [2021-07-13 20:41:22,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 926.0ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:41:23,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40582 states. [2021-07-13 20:41:23,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40582 to 20081. [2021-07-13 20:41:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20081 states, 20080 states have (on average 3.888147410358566) internal successors, (78074), 20080 states have internal predecessors, (78074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20081 states to 20081 states and 78074 transitions. [2021-07-13 20:41:23,750 INFO L78 Accepts]: Start accepts. Automaton has 20081 states and 78074 transitions. Word has length 28 [2021-07-13 20:41:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:23,750 INFO L482 AbstractCegarLoop]: Abstraction has 20081 states and 78074 transitions. [2021-07-13 20:41:23,750 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) [2021-07-13 20:41:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 20081 states and 78074 transitions. [2021-07-13 20:41:23,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:23,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:23,786 INFO L508 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] [2021-07-13 20:41:23,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4091,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:23,987 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:23,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:23,987 INFO L82 PathProgramCache]: Analyzing trace with hash -182218355, now seen corresponding path program 119 times [2021-07-13 20:41:23,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:23,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952519628] [2021-07-13 20:41:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:24,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:24,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952519628] [2021-07-13 20:41:24,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952519628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:24,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941099294] [2021-07-13 20:41:24,153 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 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 [2021-07-13 20:41:24,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:41:24,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:24,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:41:24,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:41:24,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941099294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:24,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:24,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:41:24,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745412810] [2021-07-13 20:41:24,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:24,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:24,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:24,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:24,242 INFO L87 Difference]: Start difference. First operand 20081 states and 78074 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) [2021-07-13 20:41:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:24,551 INFO L93 Difference]: Finished difference Result 29766 states and 111237 transitions. [2021-07-13 20:41:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:41:24,551 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 [2021-07-13 20:41:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:24,645 INFO L225 Difference]: With dead ends: 29766 [2021-07-13 20:41:24,646 INFO L226 Difference]: Without dead ends: 29749 [2021-07-13 20:41:24,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:41:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29749 states. [2021-07-13 20:41:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29749 to 20349. [2021-07-13 20:41:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20349 states, 20348 states have (on average 3.8934047572242974) internal successors, (79223), 20348 states have internal predecessors, (79223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20349 states to 20349 states and 79223 transitions. [2021-07-13 20:41:25,468 INFO L78 Accepts]: Start accepts. Automaton has 20349 states and 79223 transitions. Word has length 28 [2021-07-13 20:41:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:25,468 INFO L482 AbstractCegarLoop]: Abstraction has 20349 states and 79223 transitions. [2021-07-13 20:41:25,468 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) [2021-07-13 20:41:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 20349 states and 79223 transitions. [2021-07-13 20:41:25,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:25,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:25,507 INFO L508 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] [2021-07-13 20:41:25,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4092 [2021-07-13 20:41:25,708 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:25,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:25,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1325144395, now seen corresponding path program 120 times [2021-07-13 20:41:25,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:25,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979004320] [2021-07-13 20:41:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:25,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:25,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979004320] [2021-07-13 20:41:25,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979004320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:25,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7980469] [2021-07-13 20:41:25,737 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 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 [2021-07-13 20:41:25,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:41:25,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:25,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:41:25,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:41:25,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7980469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:25,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:25,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:41:25,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217053121] [2021-07-13 20:41:25,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:25,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:25,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:25,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:25,837 INFO L87 Difference]: Start difference. First operand 20349 states and 79223 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) [2021-07-13 20:41:26,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:26,313 INFO L93 Difference]: Finished difference Result 31558 states and 116818 transitions. [2021-07-13 20:41:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:41:26,313 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 [2021-07-13 20:41:26,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:26,421 INFO L225 Difference]: With dead ends: 31558 [2021-07-13 20:41:26,421 INFO L226 Difference]: Without dead ends: 31558 [2021-07-13 20:41:26,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:41:26,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31558 states. [2021-07-13 20:41:26,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31558 to 20016. [2021-07-13 20:41:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20016 states, 20015 states have (on average 3.8783912065950537) internal successors, (77626), 20015 states have internal predecessors, (77626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:27,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20016 states to 20016 states and 77626 transitions. [2021-07-13 20:41:27,055 INFO L78 Accepts]: Start accepts. Automaton has 20016 states and 77626 transitions. Word has length 28 [2021-07-13 20:41:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:27,056 INFO L482 AbstractCegarLoop]: Abstraction has 20016 states and 77626 transitions. [2021-07-13 20:41:27,056 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) [2021-07-13 20:41:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 20016 states and 77626 transitions. [2021-07-13 20:41:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:27,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:27,093 INFO L508 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] [2021-07-13 20:41:27,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4093 [2021-07-13 20:41:27,293 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:27,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:27,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1623141335, now seen corresponding path program 121 times [2021-07-13 20:41:27,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:27,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309187861] [2021-07-13 20:41:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:27,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:27,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309187861] [2021-07-13 20:41:27,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309187861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:27,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735281516] [2021-07-13 20:41:27,333 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 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 [2021-07-13 20:41:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:27,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:27,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:27,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735281516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:27,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:27,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:41:27,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600825082] [2021-07-13 20:41:27,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:41:27,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:27,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:41:27,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:27,559 INFO L87 Difference]: Start difference. First operand 20016 states and 77626 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) [2021-07-13 20:41:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:28,441 INFO L93 Difference]: Finished difference Result 29601 states and 110146 transitions. [2021-07-13 20:41:28,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:41:28,441 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 [2021-07-13 20:41:28,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:28,651 INFO L225 Difference]: With dead ends: 29601 [2021-07-13 20:41:28,651 INFO L226 Difference]: Without dead ends: 29601 [2021-07-13 20:41:28,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:41:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29601 states. [2021-07-13 20:41:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29601 to 20064. [2021-07-13 20:41:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20064 states, 20063 states have (on average 3.8771868613866323) internal successors, (77788), 20063 states have internal predecessors, (77788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20064 states to 20064 states and 77788 transitions. [2021-07-13 20:41:29,214 INFO L78 Accepts]: Start accepts. Automaton has 20064 states and 77788 transitions. Word has length 28 [2021-07-13 20:41:29,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:29,214 INFO L482 AbstractCegarLoop]: Abstraction has 20064 states and 77788 transitions. [2021-07-13 20:41:29,214 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) [2021-07-13 20:41:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 20064 states and 77788 transitions. [2021-07-13 20:41:29,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:29,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:29,251 INFO L508 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] [2021-07-13 20:41:29,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4094,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:29,452 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:29,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:29,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1886911867, now seen corresponding path program 122 times [2021-07-13 20:41:29,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:29,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84323479] [2021-07-13 20:41:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:29,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:29,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84323479] [2021-07-13 20:41:29,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84323479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:29,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496161734] [2021-07-13 20:41:29,490 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 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 [2021-07-13 20:41:29,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:29,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:29,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:29,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:29,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496161734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:29,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:29,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:41:29,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100449646] [2021-07-13 20:41:29,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:41:29,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:29,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:41:29,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:29,591 INFO L87 Difference]: Start difference. First operand 20064 states and 77788 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) [2021-07-13 20:41:30,093 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 20:41:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:30,754 INFO L93 Difference]: Finished difference Result 31138 states and 114558 transitions. [2021-07-13 20:41:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:41:30,754 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 [2021-07-13 20:41:30,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:30,847 INFO L225 Difference]: With dead ends: 31138 [2021-07-13 20:41:30,847 INFO L226 Difference]: Without dead ends: 31138 [2021-07-13 20:41:30,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 690.1ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:41:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31138 states. [2021-07-13 20:41:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31138 to 20620. [2021-07-13 20:41:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20620 states, 20619 states have (on average 3.855958096900917) internal successors, (79506), 20619 states have internal predecessors, (79506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20620 states to 20620 states and 79506 transitions. [2021-07-13 20:41:31,638 INFO L78 Accepts]: Start accepts. Automaton has 20620 states and 79506 transitions. Word has length 28 [2021-07-13 20:41:31,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:31,639 INFO L482 AbstractCegarLoop]: Abstraction has 20620 states and 79506 transitions. [2021-07-13 20:41:31,639 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) [2021-07-13 20:41:31,639 INFO L276 IsEmpty]: Start isEmpty. Operand 20620 states and 79506 transitions. [2021-07-13 20:41:31,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:31,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:31,676 INFO L508 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] [2021-07-13 20:41:31,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4095 [2021-07-13 20:41:31,876 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:31,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1931733009, now seen corresponding path program 123 times [2021-07-13 20:41:31,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:31,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471155418] [2021-07-13 20:41:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:31,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:31,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471155418] [2021-07-13 20:41:31,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471155418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:31,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475245384] [2021-07-13 20:41:31,914 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 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 [2021-07-13 20:41:31,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:41:31,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:31,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:31,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:32,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475245384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:32,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:32,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:41:32,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886755004] [2021-07-13 20:41:32,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:41:32,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:32,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:41:32,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:41:32,030 INFO L87 Difference]: Start difference. First operand 20620 states and 79506 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) [2021-07-13 20:41:32,597 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-13 20:41:33,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:33,073 INFO L93 Difference]: Finished difference Result 30264 states and 112255 transitions. [2021-07-13 20:41:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:41:33,073 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 [2021-07-13 20:41:33,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:33,161 INFO L225 Difference]: With dead ends: 30264 [2021-07-13 20:41:33,161 INFO L226 Difference]: Without dead ends: 30260 [2021-07-13 20:41:33,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 585.8ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:41:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30260 states. [2021-07-13 20:41:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30260 to 20512. [2021-07-13 20:41:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20512 states, 20511 states have (on average 3.858612451855102) internal successors, (79144), 20511 states have internal predecessors, (79144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20512 states to 20512 states and 79144 transitions. [2021-07-13 20:41:33,962 INFO L78 Accepts]: Start accepts. Automaton has 20512 states and 79144 transitions. Word has length 28 [2021-07-13 20:41:33,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:33,962 INFO L482 AbstractCegarLoop]: Abstraction has 20512 states and 79144 transitions. [2021-07-13 20:41:33,962 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) [2021-07-13 20:41:33,962 INFO L276 IsEmpty]: Start isEmpty. Operand 20512 states and 79144 transitions. [2021-07-13 20:41:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:34,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:34,000 INFO L508 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] [2021-07-13 20:41:34,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4096,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:34,201 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:34,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1066349071, now seen corresponding path program 124 times [2021-07-13 20:41:34,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:34,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375677964] [2021-07-13 20:41:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:34,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:34,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375677964] [2021-07-13 20:41:34,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375677964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:34,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938445099] [2021-07-13 20:41:34,230 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 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 [2021-07-13 20:41:34,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:34,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:34,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:41:34,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:41:34,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938445099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:34,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:34,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:41:34,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153022127] [2021-07-13 20:41:34,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:34,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:34,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:34,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:34,308 INFO L87 Difference]: Start difference. First operand 20512 states and 79144 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) [2021-07-13 20:41:34,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:34,575 INFO L93 Difference]: Finished difference Result 25599 states and 95352 transitions. [2021-07-13 20:41:34,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:41:34,576 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 [2021-07-13 20:41:34,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:34,649 INFO L225 Difference]: With dead ends: 25599 [2021-07-13 20:41:34,649 INFO L226 Difference]: Without dead ends: 25599 [2021-07-13 20:41:34,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-07-13 20:41:35,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 20822. [2021-07-13 20:41:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20822 states, 20821 states have (on average 3.8498150905335957) internal successors, (80157), 20821 states have internal predecessors, (80157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20822 states to 20822 states and 80157 transitions. [2021-07-13 20:41:35,487 INFO L78 Accepts]: Start accepts. Automaton has 20822 states and 80157 transitions. Word has length 28 [2021-07-13 20:41:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:35,487 INFO L482 AbstractCegarLoop]: Abstraction has 20822 states and 80157 transitions. [2021-07-13 20:41:35,487 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) [2021-07-13 20:41:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 20822 states and 80157 transitions. [2021-07-13 20:41:35,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:35,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:35,529 INFO L508 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] [2021-07-13 20:41:35,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4097 [2021-07-13 20:41:35,730 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:35,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:35,730 INFO L82 PathProgramCache]: Analyzing trace with hash -136149327, now seen corresponding path program 125 times [2021-07-13 20:41:35,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:35,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345674751] [2021-07-13 20:41:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:35,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:35,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345674751] [2021-07-13 20:41:35,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345674751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:35,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981277161] [2021-07-13 20:41:35,769 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 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 [2021-07-13 20:41:35,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:41:35,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:35,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:35,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:41:35,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981277161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:35,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:35,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:41:35,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093876235] [2021-07-13 20:41:35,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:35,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:35,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:35,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:35,862 INFO L87 Difference]: Start difference. First operand 20822 states and 80157 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) [2021-07-13 20:41:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:36,812 INFO L93 Difference]: Finished difference Result 31377 states and 115045 transitions. [2021-07-13 20:41:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:41:36,812 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 [2021-07-13 20:41:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:36,903 INFO L225 Difference]: With dead ends: 31377 [2021-07-13 20:41:36,903 INFO L226 Difference]: Without dead ends: 31377 [2021-07-13 20:41:36,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 460.2ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:41:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31377 states. [2021-07-13 20:41:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31377 to 22482. [2021-07-13 20:41:37,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22482 states, 22481 states have (on average 3.8615719941283753) internal successors, (86812), 22481 states have internal predecessors, (86812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:37,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22482 states to 22482 states and 86812 transitions. [2021-07-13 20:41:37,576 INFO L78 Accepts]: Start accepts. Automaton has 22482 states and 86812 transitions. Word has length 28 [2021-07-13 20:41:37,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:37,576 INFO L482 AbstractCegarLoop]: Abstraction has 22482 states and 86812 transitions. [2021-07-13 20:41:37,576 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) [2021-07-13 20:41:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 22482 states and 86812 transitions. [2021-07-13 20:41:37,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:37,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:37,616 INFO L508 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] [2021-07-13 20:41:37,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4098,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:37,816 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:37,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:37,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1975921655, now seen corresponding path program 126 times [2021-07-13 20:41:37,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:37,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345292011] [2021-07-13 20:41:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:37,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:37,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345292011] [2021-07-13 20:41:37,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345292011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:37,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199153637] [2021-07-13 20:41:37,855 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 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 [2021-07-13 20:41:37,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:41:37,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:37,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:37,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:38,090 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-13 20:41:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:41:38,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199153637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:38,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:38,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:41:38,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745082242] [2021-07-13 20:41:38,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:38,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:38,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:38,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:38,095 INFO L87 Difference]: Start difference. First operand 22482 states and 86812 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) [2021-07-13 20:41:38,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:38,912 INFO L93 Difference]: Finished difference Result 29625 states and 110530 transitions. [2021-07-13 20:41:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:41:38,912 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 [2021-07-13 20:41:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:39,005 INFO L225 Difference]: With dead ends: 29625 [2021-07-13 20:41:39,006 INFO L226 Difference]: Without dead ends: 29613 [2021-07-13 20:41:39,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:41:39,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29613 states. [2021-07-13 20:41:39,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29613 to 22654. [2021-07-13 20:41:39,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22654 states, 22653 states have (on average 3.8557365470357126) internal successors, (87344), 22653 states have internal predecessors, (87344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22654 states to 22654 states and 87344 transitions. [2021-07-13 20:41:39,784 INFO L78 Accepts]: Start accepts. Automaton has 22654 states and 87344 transitions. Word has length 28 [2021-07-13 20:41:39,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:39,784 INFO L482 AbstractCegarLoop]: Abstraction has 22654 states and 87344 transitions. [2021-07-13 20:41:39,784 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) [2021-07-13 20:41:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 22654 states and 87344 transitions. [2021-07-13 20:41:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:39,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:39,824 INFO L508 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] [2021-07-13 20:41:40,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4099 [2021-07-13 20:41:40,024 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:40,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:40,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1688262325, now seen corresponding path program 127 times [2021-07-13 20:41:40,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:40,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905197177] [2021-07-13 20:41:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:40,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:40,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905197177] [2021-07-13 20:41:40,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905197177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:40,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182007566] [2021-07-13 20:41:40,063 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 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 [2021-07-13 20:41:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:40,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:41:40,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:40,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182007566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:40,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:40,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:41:40,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595582125] [2021-07-13 20:41:40,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:41:40,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:40,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:41:40,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:41:40,173 INFO L87 Difference]: Start difference. First operand 22654 states and 87344 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) [2021-07-13 20:41:40,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:40,438 INFO L93 Difference]: Finished difference Result 26104 states and 98956 transitions. [2021-07-13 20:41:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:41:40,438 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 [2021-07-13 20:41:40,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:40,514 INFO L225 Difference]: With dead ends: 26104 [2021-07-13 20:41:40,514 INFO L226 Difference]: Without dead ends: 26104 [2021-07-13 20:41:40,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:41:40,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26104 states. [2021-07-13 20:41:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26104 to 23491. [2021-07-13 20:41:41,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23491 states, 23490 states have (on average 3.8498084291187737) internal successors, (90432), 23490 states have internal predecessors, (90432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23491 states to 23491 states and 90432 transitions. [2021-07-13 20:41:41,323 INFO L78 Accepts]: Start accepts. Automaton has 23491 states and 90432 transitions. Word has length 28 [2021-07-13 20:41:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:41,323 INFO L482 AbstractCegarLoop]: Abstraction has 23491 states and 90432 transitions. [2021-07-13 20:41:41,323 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) [2021-07-13 20:41:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 23491 states and 90432 transitions. [2021-07-13 20:41:41,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:41,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:41,374 INFO L508 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] [2021-07-13 20:41:41,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4100,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:41,574 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:41,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2131923893, now seen corresponding path program 128 times [2021-07-13 20:41:41,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:41,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890386124] [2021-07-13 20:41:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:41,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:41,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890386124] [2021-07-13 20:41:41,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890386124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:41,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157342809] [2021-07-13 20:41:41,618 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 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 [2021-07-13 20:41:41,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:41,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:41,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:41,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:41,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157342809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:41,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:41,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:41:41,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255632210] [2021-07-13 20:41:41,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:41,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:41,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:41,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:41,717 INFO L87 Difference]: Start difference. First operand 23491 states and 90432 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) [2021-07-13 20:41:42,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:42,706 INFO L93 Difference]: Finished difference Result 31312 states and 115741 transitions. [2021-07-13 20:41:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:41:42,707 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 [2021-07-13 20:41:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:42,801 INFO L225 Difference]: With dead ends: 31312 [2021-07-13 20:41:42,802 INFO L226 Difference]: Without dead ends: 31312 [2021-07-13 20:41:42,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 461.2ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:41:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31312 states. [2021-07-13 20:41:43,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31312 to 24677. [2021-07-13 20:41:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24677 states, 24676 states have (on average 3.8184875992867564) internal successors, (94225), 24676 states have internal predecessors, (94225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:43,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24677 states to 24677 states and 94225 transitions. [2021-07-13 20:41:43,541 INFO L78 Accepts]: Start accepts. Automaton has 24677 states and 94225 transitions. Word has length 28 [2021-07-13 20:41:43,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:43,541 INFO L482 AbstractCegarLoop]: Abstraction has 24677 states and 94225 transitions. [2021-07-13 20:41:43,541 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) [2021-07-13 20:41:43,541 INFO L276 IsEmpty]: Start isEmpty. Operand 24677 states and 94225 transitions. [2021-07-13 20:41:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:43,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:43,585 INFO L508 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] [2021-07-13 20:41:43,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4101 [2021-07-13 20:41:43,786 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:43,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:43,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1422950451, now seen corresponding path program 129 times [2021-07-13 20:41:43,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:43,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883622481] [2021-07-13 20:41:43,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:43,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:43,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883622481] [2021-07-13 20:41:43,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883622481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:43,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597124758] [2021-07-13 20:41:43,820 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 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 [2021-07-13 20:41:43,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:41:43,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:43,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:43,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:43,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597124758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:43,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:43,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:41:43,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377062990] [2021-07-13 20:41:43,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:41:43,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:43,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:41:43,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:41:43,902 INFO L87 Difference]: Start difference. First operand 24677 states and 94225 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) [2021-07-13 20:41:44,211 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 20:41:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:44,661 INFO L93 Difference]: Finished difference Result 30413 states and 113358 transitions. [2021-07-13 20:41:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:41:44,662 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 [2021-07-13 20:41:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:44,757 INFO L225 Difference]: With dead ends: 30413 [2021-07-13 20:41:44,757 INFO L226 Difference]: Without dead ends: 30405 [2021-07-13 20:41:44,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 440.6ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:41:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30405 states. [2021-07-13 20:41:45,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30405 to 24499. [2021-07-13 20:41:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24499 states, 24498 states have (on average 3.824557106702588) internal successors, (93694), 24498 states have internal predecessors, (93694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24499 states to 24499 states and 93694 transitions. [2021-07-13 20:41:45,664 INFO L78 Accepts]: Start accepts. Automaton has 24499 states and 93694 transitions. Word has length 28 [2021-07-13 20:41:45,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:45,664 INFO L482 AbstractCegarLoop]: Abstraction has 24499 states and 93694 transitions. [2021-07-13 20:41:45,664 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) [2021-07-13 20:41:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 24499 states and 93694 transitions. [2021-07-13 20:41:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:45,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:45,708 INFO L508 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] [2021-07-13 20:41:45,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:45,909 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:45,909 INFO L82 PathProgramCache]: Analyzing trace with hash 27046477, now seen corresponding path program 130 times [2021-07-13 20:41:45,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:45,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555113540] [2021-07-13 20:41:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:45,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:45,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555113540] [2021-07-13 20:41:45,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555113540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:45,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966809608] [2021-07-13 20:41:45,948 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 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 [2021-07-13 20:41:45,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:45,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:45,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:45,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:46,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966809608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:46,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:46,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:41:46,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946427238] [2021-07-13 20:41:46,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:41:46,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:46,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:41:46,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:41:46,039 INFO L87 Difference]: Start difference. First operand 24499 states and 93694 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) [2021-07-13 20:41:46,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:46,941 INFO L93 Difference]: Finished difference Result 32257 states and 118986 transitions. [2021-07-13 20:41:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:41:46,941 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 [2021-07-13 20:41:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:47,036 INFO L225 Difference]: With dead ends: 32257 [2021-07-13 20:41:47,037 INFO L226 Difference]: Without dead ends: 32257 [2021-07-13 20:41:47,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 403.2ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:41:47,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32257 states. [2021-07-13 20:41:47,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32257 to 25533. [2021-07-13 20:41:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25533 states, 25532 states have (on average 3.8001331662227793) internal successors, (97025), 25532 states have internal predecessors, (97025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25533 states to 25533 states and 97025 transitions. [2021-07-13 20:41:47,791 INFO L78 Accepts]: Start accepts. Automaton has 25533 states and 97025 transitions. Word has length 28 [2021-07-13 20:41:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:47,791 INFO L482 AbstractCegarLoop]: Abstraction has 25533 states and 97025 transitions. [2021-07-13 20:41:47,792 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) [2021-07-13 20:41:47,792 INFO L276 IsEmpty]: Start isEmpty. Operand 25533 states and 97025 transitions. [2021-07-13 20:41:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:47,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:47,841 INFO L508 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] [2021-07-13 20:41:48,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4103,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:48,041 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:48,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:48,042 INFO L82 PathProgramCache]: Analyzing trace with hash 415101939, now seen corresponding path program 131 times [2021-07-13 20:41:48,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:48,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311819721] [2021-07-13 20:41:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:48,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:48,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311819721] [2021-07-13 20:41:48,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311819721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:48,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743873250] [2021-07-13 20:41:48,082 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 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 [2021-07-13 20:41:48,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:41:48,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:48,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:48,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:48,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743873250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:48,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:48,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:41:48,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468178076] [2021-07-13 20:41:48,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:48,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:48,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:48,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:48,161 INFO L87 Difference]: Start difference. First operand 25533 states and 97025 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) [2021-07-13 20:41:48,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:48,771 INFO L93 Difference]: Finished difference Result 32571 states and 122068 transitions. [2021-07-13 20:41:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:41:48,771 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 [2021-07-13 20:41:48,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:48,888 INFO L225 Difference]: With dead ends: 32571 [2021-07-13 20:41:48,888 INFO L226 Difference]: Without dead ends: 32571 [2021-07-13 20:41:48,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:41:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32571 states. [2021-07-13 20:41:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32571 to 29359. [2021-07-13 20:41:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29359 states, 29358 states have (on average 3.814599087131276) internal successors, (111989), 29358 states have internal predecessors, (111989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29359 states to 29359 states and 111989 transitions. [2021-07-13 20:41:49,973 INFO L78 Accepts]: Start accepts. Automaton has 29359 states and 111989 transitions. Word has length 28 [2021-07-13 20:41:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:49,973 INFO L482 AbstractCegarLoop]: Abstraction has 29359 states and 111989 transitions. [2021-07-13 20:41:49,973 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) [2021-07-13 20:41:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 29359 states and 111989 transitions. [2021-07-13 20:41:50,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:50,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:50,033 INFO L508 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] [2021-07-13 20:41:50,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4104,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:50,233 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:50,234 INFO L82 PathProgramCache]: Analyzing trace with hash -17774665, now seen corresponding path program 132 times [2021-07-13 20:41:50,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:50,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250825113] [2021-07-13 20:41:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:50,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:50,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250825113] [2021-07-13 20:41:50,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250825113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:50,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732219606] [2021-07-13 20:41:50,267 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 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 [2021-07-13 20:41:50,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:41:50,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:50,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:50,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:50,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732219606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:50,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:50,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:41:50,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730663699] [2021-07-13 20:41:50,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:41:50,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:50,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:41:50,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:41:50,355 INFO L87 Difference]: Start difference. First operand 29359 states and 111989 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) [2021-07-13 20:41:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:51,186 INFO L93 Difference]: Finished difference Result 35770 states and 133277 transitions. [2021-07-13 20:41:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:41:51,187 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 [2021-07-13 20:41:51,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:51,305 INFO L225 Difference]: With dead ends: 35770 [2021-07-13 20:41:51,305 INFO L226 Difference]: Without dead ends: 35762 [2021-07-13 20:41:51,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 280.2ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:41:51,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35762 states. [2021-07-13 20:41:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35762 to 29325. [2021-07-13 20:41:52,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29325 states, 29324 states have (on average 3.8150320556540716) internal successors, (111872), 29324 states have internal predecessors, (111872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29325 states to 29325 states and 111872 transitions. [2021-07-13 20:41:52,240 INFO L78 Accepts]: Start accepts. Automaton has 29325 states and 111872 transitions. Word has length 28 [2021-07-13 20:41:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:52,240 INFO L482 AbstractCegarLoop]: Abstraction has 29325 states and 111872 transitions. [2021-07-13 20:41:52,240 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) [2021-07-13 20:41:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 29325 states and 111872 transitions. [2021-07-13 20:41:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:52,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:52,296 INFO L508 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] [2021-07-13 20:41:52,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:52,496 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:52,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:52,496 INFO L82 PathProgramCache]: Analyzing trace with hash -913595481, now seen corresponding path program 133 times [2021-07-13 20:41:52,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:52,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155156107] [2021-07-13 20:41:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:52,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:52,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155156107] [2021-07-13 20:41:52,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155156107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:52,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916432640] [2021-07-13 20:41:52,533 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 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 [2021-07-13 20:41:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:52,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:52,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:52,791 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-13 20:41:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:52,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916432640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:52,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:52,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:41:52,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512390792] [2021-07-13 20:41:52,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:41:52,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:52,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:41:52,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:41:52,797 INFO L87 Difference]: Start difference. First operand 29325 states and 111872 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) [2021-07-13 20:41:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:53,281 INFO L93 Difference]: Finished difference Result 32332 states and 121875 transitions. [2021-07-13 20:41:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:41:53,281 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 [2021-07-13 20:41:53,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:53,385 INFO L225 Difference]: With dead ends: 32332 [2021-07-13 20:41:53,385 INFO L226 Difference]: Without dead ends: 32332 [2021-07-13 20:41:53,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:41:53,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32332 states. [2021-07-13 20:41:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32332 to 29928. [2021-07-13 20:41:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29928 states, 29927 states have (on average 3.812978247067865) internal successors, (114111), 29927 states have internal predecessors, (114111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:54,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29928 states to 29928 states and 114111 transitions. [2021-07-13 20:41:54,380 INFO L78 Accepts]: Start accepts. Automaton has 29928 states and 114111 transitions. Word has length 28 [2021-07-13 20:41:54,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:54,380 INFO L482 AbstractCegarLoop]: Abstraction has 29928 states and 114111 transitions. [2021-07-13 20:41:54,380 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) [2021-07-13 20:41:54,381 INFO L276 IsEmpty]: Start isEmpty. Operand 29928 states and 114111 transitions. [2021-07-13 20:41:54,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:54,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:54,442 INFO L508 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] [2021-07-13 20:41:54,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4106,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:54,642 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:54,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:54,643 INFO L82 PathProgramCache]: Analyzing trace with hash 579561993, now seen corresponding path program 134 times [2021-07-13 20:41:54,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:54,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879452128] [2021-07-13 20:41:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:54,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:54,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879452128] [2021-07-13 20:41:54,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879452128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:54,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982558009] [2021-07-13 20:41:54,679 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 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 [2021-07-13 20:41:54,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:41:54,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:54,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:54,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:41:54,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982558009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:54,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:54,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:41:54,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875875987] [2021-07-13 20:41:54,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:41:54,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:54,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:41:54,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:41:54,763 INFO L87 Difference]: Start difference. First operand 29928 states and 114111 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) [2021-07-13 20:41:55,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:55,637 INFO L93 Difference]: Finished difference Result 36766 states and 136935 transitions. [2021-07-13 20:41:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:41:55,637 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 [2021-07-13 20:41:55,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:55,765 INFO L225 Difference]: With dead ends: 36766 [2021-07-13 20:41:55,765 INFO L226 Difference]: Without dead ends: 36742 [2021-07-13 20:41:55,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 301.8ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:41:55,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36742 states. [2021-07-13 20:41:56,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36742 to 30100. [2021-07-13 20:41:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30100 states, 30099 states have (on average 3.8089305292534634) internal successors, (114645), 30099 states have internal predecessors, (114645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30100 states to 30100 states and 114645 transitions. [2021-07-13 20:41:56,902 INFO L78 Accepts]: Start accepts. Automaton has 30100 states and 114645 transitions. Word has length 28 [2021-07-13 20:41:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:56,902 INFO L482 AbstractCegarLoop]: Abstraction has 30100 states and 114645 transitions. [2021-07-13 20:41:56,902 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) [2021-07-13 20:41:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 30100 states and 114645 transitions. [2021-07-13 20:41:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:56,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:56,974 INFO L508 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] [2021-07-13 20:41:57,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4107,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:57,174 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:57,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:57,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1271447701, now seen corresponding path program 135 times [2021-07-13 20:41:57,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:57,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886287356] [2021-07-13 20:41:57,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:57,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:57,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886287356] [2021-07-13 20:41:57,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886287356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:57,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969999062] [2021-07-13 20:41:57,216 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 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 [2021-07-13 20:41:57,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:41:57,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:57,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:41:57,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:57,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969999062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:57,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:57,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-13 20:41:57,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202212057] [2021-07-13 20:41:57,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:41:57,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:57,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:41:57,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:41:57,317 INFO L87 Difference]: Start difference. First operand 30100 states and 114645 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) [2021-07-13 20:41:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:41:57,869 INFO L93 Difference]: Finished difference Result 32808 states and 123611 transitions. [2021-07-13 20:41:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:41:57,869 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 [2021-07-13 20:41:57,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:41:57,958 INFO L225 Difference]: With dead ends: 32808 [2021-07-13 20:41:57,958 INFO L226 Difference]: Without dead ends: 32808 [2021-07-13 20:41:57,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:41:57,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32808 states. [2021-07-13 20:41:58,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32808 to 30021. [2021-07-13 20:41:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30021 states, 30020 states have (on average 3.8105929380413057) internal successors, (114394), 30020 states have internal predecessors, (114394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:41:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30021 states to 30021 states and 114394 transitions. [2021-07-13 20:41:58,957 INFO L78 Accepts]: Start accepts. Automaton has 30021 states and 114394 transitions. Word has length 28 [2021-07-13 20:41:58,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:41:58,957 INFO L482 AbstractCegarLoop]: Abstraction has 30021 states and 114394 transitions. [2021-07-13 20:41:58,957 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) [2021-07-13 20:41:58,957 INFO L276 IsEmpty]: Start isEmpty. Operand 30021 states and 114394 transitions. [2021-07-13 20:41:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:41:59,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:41:59,023 INFO L508 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] [2021-07-13 20:41:59,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4108,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:41:59,223 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:41:59,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:41:59,223 INFO L82 PathProgramCache]: Analyzing trace with hash -412931571, now seen corresponding path program 136 times [2021-07-13 20:41:59,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:41:59,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787205146] [2021-07-13 20:41:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:41:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:41:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:59,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:41:59,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787205146] [2021-07-13 20:41:59,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787205146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:59,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354000110] [2021-07-13 20:41:59,263 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 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 [2021-07-13 20:41:59,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:41:59,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:41:59,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:41:59,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:41:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:41:59,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354000110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:41:59,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:41:59,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:41:59,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279071500] [2021-07-13 20:41:59,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:41:59,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:41:59,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:41:59,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:41:59,349 INFO L87 Difference]: Start difference. First operand 30021 states and 114394 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) [2021-07-13 20:42:00,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:42:00,244 INFO L93 Difference]: Finished difference Result 36684 states and 136681 transitions. [2021-07-13 20:42:00,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:42:00,244 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 [2021-07-13 20:42:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:42:00,366 INFO L225 Difference]: With dead ends: 36684 [2021-07-13 20:42:00,366 INFO L226 Difference]: Without dead ends: 36644 [2021-07-13 20:42:00,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:42:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36644 states. [2021-07-13 20:42:01,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36644 to 30177. [2021-07-13 20:42:01,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30177 states, 30176 states have (on average 3.806733828207847) internal successors, (114872), 30176 states have internal predecessors, (114872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)