/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:11:46,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:11:46,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:11:46,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:11:46,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 23:11:46,957 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:11:46,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:11:46,958 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:11:46,958 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:11:46,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:11:46,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:11:46,961 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:11:46,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:11:46,961 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:11:46,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:11:46,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:11:46,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:11:46,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:11:46,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:11:46,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:11:46,963 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:11:46,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:11:46,963 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:11:46,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:11:46,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:11:46,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:11:46,964 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:11:46,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:11:46,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:11:46,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:11:46,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:11:46,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:11:46,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:11:46,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:11:46,965 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:11:46,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:11:46,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:11:47,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:11:47,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:11:47,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:11:47,278 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:11:47,280 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:11:47,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive.wvr.bpl [2021-06-05 23:11:47,281 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive.wvr.bpl' [2021-06-05 23:11:47,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:11:47,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:11:47,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:11:47,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:11:47,333 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:11:47,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:11:47" (1/1) ... [2021-06-05 23:11:47,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:11:47" (1/1) ... [2021-06-05 23:11:47,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:11:47,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:11:47,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:11:47,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:11:47,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:11:47" (1/1) ... [2021-06-05 23:11:47,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:11:47" (1/1) ... [2021-06-05 23:11:47,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:11:47" (1/1) ... [2021-06-05 23:11:47,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:11:47" (1/1) ... [2021-06-05 23:11:47,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:11:47" (1/1) ... [2021-06-05 23:11:47,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:11:47" (1/1) ... [2021-06-05 23:11:47,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:11:47" (1/1) ... [2021-06-05 23:11:47,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:11:47,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:11:47,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:11:47,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:11:47,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:11:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:11:47,453 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:11:47,453 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:11:47,453 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:11:47,453 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:11:47,453 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:11:47,453 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:11:47,454 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:11:47,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:11:47,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:11:47,454 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:11:47,455 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:11:47,455 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:11:47,456 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 23:11:47,668 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:11:47,669 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:11:47,670 INFO L202 PluginConnector]: Adding new model send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:11:47 BoogieIcfgContainer [2021-06-05 23:11:47,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:11:47,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:11:47,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:11:47,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:11:47,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:11:47" (1/2) ... [2021-06-05 23:11:47,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340c80c0 and model type send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:11:47, skipping insertion in model container [2021-06-05 23:11:47,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:11:47" (2/2) ... [2021-06-05 23:11:47,678 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive.wvr.bpl [2021-06-05 23:11:47,683 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:11:47,684 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:11:47,684 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:11:47,685 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:11:47,715 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 23:11:47,734 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 23:11:47,759 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:11:47,759 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:11:47,759 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:11:47,759 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:11:47,759 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:11:47,759 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:11:47,759 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:11:47,759 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:11:47,768 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 30 transitions, 84 flow [2021-06-05 23:11:47,811 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 149 states, 147 states have (on average 2.7551020408163267) internal successors, (405), 148 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:47,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 147 states have (on average 2.7551020408163267) internal successors, (405), 148 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:47,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 23:11:47,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:47,822 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:47,822 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:47,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:47,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051581, now seen corresponding path program 1 times [2021-06-05 23:11:47,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:47,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193948430] [2021-06-05 23:11:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:47,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:47,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193948430] [2021-06-05 23:11:47,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193948430] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:11:47,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:11:47,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:11:47,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203628307] [2021-06-05 23:11:47,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:11:47,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:47,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:11:47,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:11:47,988 INFO L87 Difference]: Start difference. First operand has 149 states, 147 states have (on average 2.7551020408163267) internal successors, (405), 148 states have internal predecessors, (405), 0 states have call successors, (0), 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 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:48,039 INFO L93 Difference]: Finished difference Result 159 states and 404 transitions. [2021-06-05 23:11:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:11:48,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 23:11:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:48,060 INFO L225 Difference]: With dead ends: 159 [2021-06-05 23:11:48,060 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 23:11:48,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:11:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 23:11:48,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-06-05 23:11:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.39) internal successors, (239), 100 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 239 transitions. [2021-06-05 23:11:48,120 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 239 transitions. Word has length 17 [2021-06-05 23:11:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:48,121 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 239 transitions. [2021-06-05 23:11:48,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 239 transitions. [2021-06-05 23:11:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 23:11:48,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:48,123 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:48,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:11:48,124 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:48,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1722493283, now seen corresponding path program 2 times [2021-06-05 23:11:48,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:48,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491450007] [2021-06-05 23:11:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:48,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:48,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491450007] [2021-06-05 23:11:48,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491450007] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:11:48,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:11:48,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:11:48,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309507110] [2021-06-05 23:11:48,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:11:48,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:48,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:11:48,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:11:48,199 INFO L87 Difference]: Start difference. First operand 101 states and 239 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:48,249 INFO L93 Difference]: Finished difference Result 153 states and 362 transitions. [2021-06-05 23:11:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:11:48,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 23:11:48,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:48,253 INFO L225 Difference]: With dead ends: 153 [2021-06-05 23:11:48,254 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 23:11:48,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:11:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 23:11:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-06-05 23:11:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.4344262295081966) internal successors, (297), 122 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 297 transitions. [2021-06-05 23:11:48,275 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 297 transitions. Word has length 17 [2021-06-05 23:11:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:48,275 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 297 transitions. [2021-06-05 23:11:48,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 297 transitions. [2021-06-05 23:11:48,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 23:11:48,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:48,280 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:48,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:11:48,281 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:48,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1424318111, now seen corresponding path program 1 times [2021-06-05 23:11:48,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:48,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291256295] [2021-06-05 23:11:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:48,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:48,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291256295] [2021-06-05 23:11:48,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291256295] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:11:48,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:11:48,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:11:48,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966038911] [2021-06-05 23:11:48,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:11:48,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:48,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:11:48,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:11:48,327 INFO L87 Difference]: Start difference. First operand 123 states and 297 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:48,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:48,338 INFO L93 Difference]: Finished difference Result 137 states and 328 transitions. [2021-06-05 23:11:48,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:11:48,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 23:11:48,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:48,342 INFO L225 Difference]: With dead ends: 137 [2021-06-05 23:11:48,345 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 23:11:48,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:11:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 23:11:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-06-05 23:11:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.411764705882353) internal successors, (328), 136 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2021-06-05 23:11:48,361 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 19 [2021-06-05 23:11:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:48,361 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2021-06-05 23:11:48,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2021-06-05 23:11:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:11:48,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:48,362 INFO L554 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] [2021-06-05 23:11:48,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:11:48,363 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:48,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:48,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1463492541, now seen corresponding path program 1 times [2021-06-05 23:11:48,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:48,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805600604] [2021-06-05 23:11:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:48,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:48,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805600604] [2021-06-05 23:11:48,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805600604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:48,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908941032] [2021-06-05 23:11:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:48,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:11:48,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:48,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 23:11:48,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:48,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:48,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:48,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2021-06-05 23:11:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:48,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908941032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:48,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:48,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 23:11:48,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579330536] [2021-06-05 23:11:48,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:11:48,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:48,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:11:48,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:11:48,804 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:48,893 INFO L93 Difference]: Finished difference Result 207 states and 501 transitions. [2021-06-05 23:11:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:11:48,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:11:48,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:48,894 INFO L225 Difference]: With dead ends: 207 [2021-06-05 23:11:48,894 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 23:11:48,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:11:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 23:11:48,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2021-06-05 23:11:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.448717948717949) internal successors, (382), 156 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 382 transitions. [2021-06-05 23:11:48,909 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 382 transitions. Word has length 23 [2021-06-05 23:11:48,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:48,909 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 382 transitions. [2021-06-05 23:11:48,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:48,909 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 382 transitions. [2021-06-05 23:11:48,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:11:48,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:48,912 INFO L554 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] [2021-06-05 23:11:49,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:49,132 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:49,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:49,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2032513123, now seen corresponding path program 1 times [2021-06-05 23:11:49,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:49,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193214864] [2021-06-05 23:11:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:49,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:49,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193214864] [2021-06-05 23:11:49,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193214864] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:11:49,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:11:49,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:11:49,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631831124] [2021-06-05 23:11:49,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:11:49,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:49,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:11:49,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:11:49,152 INFO L87 Difference]: Start difference. First operand 157 states and 382 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:49,157 INFO L93 Difference]: Finished difference Result 175 states and 425 transitions. [2021-06-05 23:11:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:11:49,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:11:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:49,159 INFO L225 Difference]: With dead ends: 175 [2021-06-05 23:11:49,159 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 23:11:49,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:11:49,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 23:11:49,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 153. [2021-06-05 23:11:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.4342105263157894) internal successors, (370), 152 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 370 transitions. [2021-06-05 23:11:49,164 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 370 transitions. Word has length 23 [2021-06-05 23:11:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:49,164 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 370 transitions. [2021-06-05 23:11:49,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 370 transitions. [2021-06-05 23:11:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:11:49,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:49,165 INFO L554 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] [2021-06-05 23:11:49,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 23:11:49,165 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:49,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:49,166 INFO L82 PathProgramCache]: Analyzing trace with hash 113936453, now seen corresponding path program 2 times [2021-06-05 23:11:49,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:49,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276258880] [2021-06-05 23:11:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:49,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:49,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276258880] [2021-06-05 23:11:49,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276258880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:49,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384944756] [2021-06-05 23:11:49,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:49,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:11:49,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:11:49,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:11:49,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384944756] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:11:49,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 23:11:49,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-06-05 23:11:49,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583724588] [2021-06-05 23:11:49,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:11:49,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:49,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:11:49,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:11:49,283 INFO L87 Difference]: Start difference. First operand 153 states and 370 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:49,295 INFO L93 Difference]: Finished difference Result 401 states and 958 transitions. [2021-06-05 23:11:49,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:11:49,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:11:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:49,298 INFO L225 Difference]: With dead ends: 401 [2021-06-05 23:11:49,298 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 23:11:49,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:11:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 23:11:49,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 259. [2021-06-05 23:11:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.5155038759689923) internal successors, (649), 258 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 649 transitions. [2021-06-05 23:11:49,306 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 649 transitions. Word has length 25 [2021-06-05 23:11:49,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:49,306 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 649 transitions. [2021-06-05 23:11:49,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:49,306 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 649 transitions. [2021-06-05 23:11:49,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:11:49,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:49,307 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:49,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:49,531 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:49,531 INFO L82 PathProgramCache]: Analyzing trace with hash -432740959, now seen corresponding path program 3 times [2021-06-05 23:11:49,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:49,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132036909] [2021-06-05 23:11:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:49,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:49,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132036909] [2021-06-05 23:11:49,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132036909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:49,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426984182] [2021-06-05 23:11:49,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:49,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:11:49,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:49,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 23:11:49,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:49,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426984182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:49,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:49,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 23:11:49,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871754490] [2021-06-05 23:11:49,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:11:49,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:49,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:11:49,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:11:49,660 INFO L87 Difference]: Start difference. First operand 259 states and 649 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:49,672 INFO L93 Difference]: Finished difference Result 363 states and 850 transitions. [2021-06-05 23:11:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:11:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:11:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:49,674 INFO L225 Difference]: With dead ends: 363 [2021-06-05 23:11:49,675 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 23:11:49,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:11:49,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 23:11:49,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 319. [2021-06-05 23:11:49,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.39937106918239) internal successors, (763), 318 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 763 transitions. [2021-06-05 23:11:49,689 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 763 transitions. Word has length 29 [2021-06-05 23:11:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:49,689 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 763 transitions. [2021-06-05 23:11:49,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:49,689 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 763 transitions. [2021-06-05 23:11:49,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:11:49,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:49,692 INFO L554 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, 1] [2021-06-05 23:11:49,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:49,915 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:49,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:49,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1231702591, now seen corresponding path program 1 times [2021-06-05 23:11:49,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:49,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794565773] [2021-06-05 23:11:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:50,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:50,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794565773] [2021-06-05 23:11:50,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794565773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:50,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032881892] [2021-06-05 23:11:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:50,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:11:50,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:50,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:50,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:50,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 23:11:50,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:50,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:50,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:50,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2021-06-05 23:11:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:50,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032881892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:50,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:50,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 23:11:50,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406229487] [2021-06-05 23:11:50,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:11:50,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:50,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:11:50,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:11:50,367 INFO L87 Difference]: Start difference. First operand 319 states and 763 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:50,531 INFO L93 Difference]: Finished difference Result 455 states and 1091 transitions. [2021-06-05 23:11:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:11:50,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 29 [2021-06-05 23:11:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:50,533 INFO L225 Difference]: With dead ends: 455 [2021-06-05 23:11:50,533 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 23:11:50,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:11:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 23:11:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 351. [2021-06-05 23:11:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.3857142857142857) internal successors, (835), 350 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:50,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 835 transitions. [2021-06-05 23:11:50,542 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 835 transitions. Word has length 29 [2021-06-05 23:11:50,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:50,542 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 835 transitions. [2021-06-05 23:11:50,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 835 transitions. [2021-06-05 23:11:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:11:50,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:50,543 INFO L554 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, 1] [2021-06-05 23:11:50,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:50,757 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:50,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:50,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1556600769, now seen corresponding path program 2 times [2021-06-05 23:11:50,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:50,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327590160] [2021-06-05 23:11:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:50,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:50,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327590160] [2021-06-05 23:11:50,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327590160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:50,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907235401] [2021-06-05 23:11:50,866 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:50,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:11:50,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:50,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:11:50,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:51,014 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:11:51,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 23:11:51,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:51,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:51,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:51,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:7 [2021-06-05 23:11:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:51,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907235401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:51,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:51,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 23:11:51,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378239640] [2021-06-05 23:11:51,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:11:51,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:51,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:11:51,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:11:51,043 INFO L87 Difference]: Start difference. First operand 351 states and 835 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:51,204 INFO L93 Difference]: Finished difference Result 483 states and 1151 transitions. [2021-06-05 23:11:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:11:51,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 29 [2021-06-05 23:11:51,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:51,207 INFO L225 Difference]: With dead ends: 483 [2021-06-05 23:11:51,207 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 23:11:51,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:11:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 23:11:51,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 383. [2021-06-05 23:11:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.3952879581151834) internal successors, (915), 382 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 915 transitions. [2021-06-05 23:11:51,216 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 915 transitions. Word has length 29 [2021-06-05 23:11:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:51,216 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 915 transitions. [2021-06-05 23:11:51,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 915 transitions. [2021-06-05 23:11:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:11:51,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:51,218 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:51,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:51,441 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash -974284733, now seen corresponding path program 3 times [2021-06-05 23:11:51,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:51,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795868942] [2021-06-05 23:11:51,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:51,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:51,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795868942] [2021-06-05 23:11:51,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795868942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:51,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352949161] [2021-06-05 23:11:51,477 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:51,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:11:51,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:51,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:11:51,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:11:51,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352949161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:51,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:51,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 23:11:51,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834616131] [2021-06-05 23:11:51,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:11:51,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:51,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:11:51,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:11:51,577 INFO L87 Difference]: Start difference. First operand 383 states and 915 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:51,603 INFO L93 Difference]: Finished difference Result 827 states and 1940 transitions. [2021-06-05 23:11:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:11:51,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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 31 [2021-06-05 23:11:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:51,607 INFO L225 Difference]: With dead ends: 827 [2021-06-05 23:11:51,607 INFO L226 Difference]: Without dead ends: 819 [2021-06-05 23:11:51,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:11:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-06-05 23:11:51,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 463. [2021-06-05 23:11:51,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.448051948051948) internal successors, (1131), 462 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:51,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1131 transitions. [2021-06-05 23:11:51,619 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1131 transitions. Word has length 31 [2021-06-05 23:11:51,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:51,619 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1131 transitions. [2021-06-05 23:11:51,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:51,620 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1131 transitions. [2021-06-05 23:11:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:11:51,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:51,621 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:51,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:51,843 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:51,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:51,844 INFO L82 PathProgramCache]: Analyzing trace with hash -257743713, now seen corresponding path program 4 times [2021-06-05 23:11:51,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:51,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101215213] [2021-06-05 23:11:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:52,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:52,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101215213] [2021-06-05 23:11:52,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101215213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:52,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130060490] [2021-06-05 23:11:52,057 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:52,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:11:52,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:52,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:11:52,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:52,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:52,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:52,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:52,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:52,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:52,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:52,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-06-05 23:11:52,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:52,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:52,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:52,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:11:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:52,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130060490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:52,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:52,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 23:11:52,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503476506] [2021-06-05 23:11:52,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:11:52,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:11:52,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:11:52,360 INFO L87 Difference]: Start difference. First operand 463 states and 1131 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:52,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:52,689 INFO L93 Difference]: Finished difference Result 851 states and 2063 transitions. [2021-06-05 23:11:52,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:11:52,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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 35 [2021-06-05 23:11:52,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:52,696 INFO L225 Difference]: With dead ends: 851 [2021-06-05 23:11:52,696 INFO L226 Difference]: Without dead ends: 735 [2021-06-05 23:11:52,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:11:52,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-06-05 23:11:52,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 591. [2021-06-05 23:11:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 2.4322033898305087) internal successors, (1435), 590 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1435 transitions. [2021-06-05 23:11:52,719 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1435 transitions. Word has length 35 [2021-06-05 23:11:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:52,719 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1435 transitions. [2021-06-05 23:11:52,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1435 transitions. [2021-06-05 23:11:52,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:11:52,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:52,721 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:52,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:52,941 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:52,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:52,941 INFO L82 PathProgramCache]: Analyzing trace with hash 734580383, now seen corresponding path program 5 times [2021-06-05 23:11:52,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:52,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646058479] [2021-06-05 23:11:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:53,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:53,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646058479] [2021-06-05 23:11:53,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646058479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:53,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910503572] [2021-06-05 23:11:53,131 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:53,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:11:53,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:53,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:11:53,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:53,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:53,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:53,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:53,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:53,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:53,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:53,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-06-05 23:11:53,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:53,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:53,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:53,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:11:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:53,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910503572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:53,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:53,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 23:11:53,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226360942] [2021-06-05 23:11:53,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:11:53,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:53,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:11:53,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:11:53,400 INFO L87 Difference]: Start difference. First operand 591 states and 1435 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:53,642 INFO L93 Difference]: Finished difference Result 1023 states and 2527 transitions. [2021-06-05 23:11:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:11:53,643 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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 35 [2021-06-05 23:11:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:53,647 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 23:11:53,647 INFO L226 Difference]: Without dead ends: 959 [2021-06-05 23:11:53,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:11:53,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-06-05 23:11:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 607. [2021-06-05 23:11:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.433993399339934) internal successors, (1475), 606 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1475 transitions. [2021-06-05 23:11:53,663 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1475 transitions. Word has length 35 [2021-06-05 23:11:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:53,663 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1475 transitions. [2021-06-05 23:11:53,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1475 transitions. [2021-06-05 23:11:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:11:53,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:53,664 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:53,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 23:11:53,878 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:53,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:53,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1026803359, now seen corresponding path program 6 times [2021-06-05 23:11:53,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:53,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726571246] [2021-06-05 23:11:53,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:54,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:54,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726571246] [2021-06-05 23:11:54,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726571246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:54,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928605117] [2021-06-05 23:11:54,064 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:54,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:11:54,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:54,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:11:54,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:54,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:54,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:54,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:54,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:54,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:54,257 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-06-05 23:11:54,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:54,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:54,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:54,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:11:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:54,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928605117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:54,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:54,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 23:11:54,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672256013] [2021-06-05 23:11:54,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:11:54,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:54,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:11:54,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:11:54,280 INFO L87 Difference]: Start difference. First operand 607 states and 1475 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:54,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:54,733 INFO L93 Difference]: Finished difference Result 1319 states and 3177 transitions. [2021-06-05 23:11:54,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:11:54,734 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 35 [2021-06-05 23:11:54,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:54,738 INFO L225 Difference]: With dead ends: 1319 [2021-06-05 23:11:54,738 INFO L226 Difference]: Without dead ends: 1103 [2021-06-05 23:11:54,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:11:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-06-05 23:11:54,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 671. [2021-06-05 23:11:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.428358208955224) internal successors, (1627), 670 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1627 transitions. [2021-06-05 23:11:54,756 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1627 transitions. Word has length 35 [2021-06-05 23:11:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:54,756 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 1627 transitions. [2021-06-05 23:11:54,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1627 transitions. [2021-06-05 23:11:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:11:54,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:54,758 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:54,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:54,972 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:54,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:54,972 INFO L82 PathProgramCache]: Analyzing trace with hash 2019127455, now seen corresponding path program 7 times [2021-06-05 23:11:54,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:54,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133881040] [2021-06-05 23:11:54,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:55,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:55,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133881040] [2021-06-05 23:11:55,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133881040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:55,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39960701] [2021-06-05 23:11:55,102 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:55,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:11:55,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:55,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:55,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:55,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:55,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:55,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-06-05 23:11:55,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:55,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:55,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:55,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:11:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:55,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39960701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:55,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:55,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 23:11:55,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083096229] [2021-06-05 23:11:55,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:11:55,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:55,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:11:55,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:11:55,347 INFO L87 Difference]: Start difference. First operand 671 states and 1627 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:55,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:55,723 INFO L93 Difference]: Finished difference Result 1239 states and 3075 transitions. [2021-06-05 23:11:55,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:11:55,724 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 35 [2021-06-05 23:11:55,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:55,729 INFO L225 Difference]: With dead ends: 1239 [2021-06-05 23:11:55,729 INFO L226 Difference]: Without dead ends: 1151 [2021-06-05 23:11:55,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 328.6ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:11:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-06-05 23:11:55,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 543. [2021-06-05 23:11:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.440959409594096) internal successors, (1323), 542 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:55,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1323 transitions. [2021-06-05 23:11:55,745 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1323 transitions. Word has length 35 [2021-06-05 23:11:55,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:55,745 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1323 transitions. [2021-06-05 23:11:55,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:55,745 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1323 transitions. [2021-06-05 23:11:55,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:11:55,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:55,746 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:55,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:55,973 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:55,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:55,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2135123297, now seen corresponding path program 8 times [2021-06-05 23:11:55,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:55,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912654712] [2021-06-05 23:11:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:56,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:56,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912654712] [2021-06-05 23:11:56,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912654712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:56,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853126817] [2021-06-05 23:11:56,127 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:56,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:11:56,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:56,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:11:56,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:56,288 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:11:56,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 24 [2021-06-05 23:11:56,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:56,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:56,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:56,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:7 [2021-06-05 23:11:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:56,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853126817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:56,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:56,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 23:11:56,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587013350] [2021-06-05 23:11:56,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:11:56,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:56,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:11:56,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:11:56,311 INFO L87 Difference]: Start difference. First operand 543 states and 1323 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:56,552 INFO L93 Difference]: Finished difference Result 787 states and 1911 transitions. [2021-06-05 23:11:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:11:56,553 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 35 [2021-06-05 23:11:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:56,556 INFO L225 Difference]: With dead ends: 787 [2021-06-05 23:11:56,556 INFO L226 Difference]: Without dead ends: 751 [2021-06-05 23:11:56,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:11:56,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-06-05 23:11:56,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 575. [2021-06-05 23:11:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.4442508710801394) internal successors, (1403), 574 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1403 transitions. [2021-06-05 23:11:56,568 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1403 transitions. Word has length 35 [2021-06-05 23:11:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:56,569 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1403 transitions. [2021-06-05 23:11:56,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:56,569 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1403 transitions. [2021-06-05 23:11:56,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:11:56,570 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:56,570 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:56,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 23:11:56,792 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:56,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:56,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1078125663, now seen corresponding path program 9 times [2021-06-05 23:11:56,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:56,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909656853] [2021-06-05 23:11:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:56,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:56,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909656853] [2021-06-05 23:11:56,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909656853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:56,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371048052] [2021-06-05 23:11:56,844 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:56,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:11:56,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:11:56,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:11:56,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371048052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:56,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:56,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 23:11:56,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436091109] [2021-06-05 23:11:56,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:11:56,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:56,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:11:56,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:11:56,935 INFO L87 Difference]: Start difference. First operand 575 states and 1403 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:56,960 INFO L93 Difference]: Finished difference Result 1199 states and 2863 transitions. [2021-06-05 23:11:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:11:56,961 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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 37 [2021-06-05 23:11:56,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:56,965 INFO L225 Difference]: With dead ends: 1199 [2021-06-05 23:11:56,965 INFO L226 Difference]: Without dead ends: 1191 [2021-06-05 23:11:56,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:11:56,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-05 23:11:56,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 671. [2021-06-05 23:11:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.476119402985075) internal successors, (1659), 670 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1659 transitions. [2021-06-05 23:11:56,981 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1659 transitions. Word has length 37 [2021-06-05 23:11:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:56,981 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 1659 transitions. [2021-06-05 23:11:56,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1659 transitions. [2021-06-05 23:11:56,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:11:56,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:56,983 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:57,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 23:11:57,197 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:57,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1188270307, now seen corresponding path program 10 times [2021-06-05 23:11:57,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:57,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525622697] [2021-06-05 23:11:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:11:57,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:57,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525622697] [2021-06-05 23:11:57,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525622697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:57,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950616803] [2021-06-05 23:11:57,405 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:57,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:11:57,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:57,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:11:57,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:57,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:57,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:57,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:57,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:57,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:57,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:57,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:57,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:57,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:57,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:57,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:57,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:57,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:57,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:57,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 23:11:57,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:57,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:57,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:57,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 23:11:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:57,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950616803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:57,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:57,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 23:11:57,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027881030] [2021-06-05 23:11:57,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:11:57,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:57,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:11:57,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:11:57,734 INFO L87 Difference]: Start difference. First operand 671 states and 1659 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:58,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:58,138 INFO L93 Difference]: Finished difference Result 1511 states and 3681 transitions. [2021-06-05 23:11:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:11:58,139 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:11:58,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:58,144 INFO L225 Difference]: With dead ends: 1511 [2021-06-05 23:11:58,144 INFO L226 Difference]: Without dead ends: 1295 [2021-06-05 23:11:58,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:11:58,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-06-05 23:11:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 895. [2021-06-05 23:11:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.446308724832215) internal successors, (2187), 894 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2187 transitions. [2021-06-05 23:11:58,163 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2187 transitions. Word has length 41 [2021-06-05 23:11:58,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:58,163 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 2187 transitions. [2021-06-05 23:11:58,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:58,163 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2187 transitions. [2021-06-05 23:11:58,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:11:58,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:58,165 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:58,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 23:11:58,381 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:58,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:58,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1600033053, now seen corresponding path program 11 times [2021-06-05 23:11:58,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:58,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363142483] [2021-06-05 23:11:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:58,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:58,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363142483] [2021-06-05 23:11:58,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363142483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:58,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709640901] [2021-06-05 23:11:58,561 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:58,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:11:58,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:58,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:11:58,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:58,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:58,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:58,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:58,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:58,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:58,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:58,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:58,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:58,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:58,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:58,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:58,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:58,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:58,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:58,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 23:11:58,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:58,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:58,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:11:58,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 23:11:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:58,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709640901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:58,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:58,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 23:11:58,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626347805] [2021-06-05 23:11:58,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:11:58,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:58,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:11:58,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:11:58,926 INFO L87 Difference]: Start difference. First operand 895 states and 2187 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:59,324 INFO L93 Difference]: Finished difference Result 1927 states and 4811 transitions. [2021-06-05 23:11:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:11:59,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:11:59,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:59,331 INFO L225 Difference]: With dead ends: 1927 [2021-06-05 23:11:59,331 INFO L226 Difference]: Without dead ends: 1839 [2021-06-05 23:11:59,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 413.6ms TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:11:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-06-05 23:11:59,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 991. [2021-06-05 23:11:59,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 2.4434343434343435) internal successors, (2419), 990 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2419 transitions. [2021-06-05 23:11:59,353 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2419 transitions. Word has length 41 [2021-06-05 23:11:59,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:59,354 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 2419 transitions. [2021-06-05 23:11:59,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:11:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2419 transitions. [2021-06-05 23:11:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:11:59,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:59,355 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:59,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:59,569 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:59,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:59,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1099969309, now seen corresponding path program 12 times [2021-06-05 23:11:59,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:59,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588557872] [2021-06-05 23:11:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:11:59,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:59,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588557872] [2021-06-05 23:11:59,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588557872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:59,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650292391] [2021-06-05 23:11:59,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:59,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:11:59,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:59,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:11:59,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:00,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:00,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:00,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:00,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:00,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:00,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:00,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:00,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:00,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:00,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:00,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:00,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:00,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:00,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:00,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:00,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 31 [2021-06-05 23:12:00,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:00,189 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:12:00,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:00,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:89, output treesize:7 [2021-06-05 23:12:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:00,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650292391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:00,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:00,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 23:12:00,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028113640] [2021-06-05 23:12:00,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:12:00,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:00,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:12:00,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:12:00,207 INFO L87 Difference]: Start difference. First operand 991 states and 2419 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:00,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:00,953 INFO L93 Difference]: Finished difference Result 2259 states and 5553 transitions. [2021-06-05 23:12:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:12:00,953 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:12:00,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:00,958 INFO L225 Difference]: With dead ends: 2259 [2021-06-05 23:12:00,958 INFO L226 Difference]: Without dead ends: 2015 [2021-06-05 23:12:00,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 527.4ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:12:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-06-05 23:12:00,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1023. [2021-06-05 23:12:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 2.4452054794520546) internal successors, (2499), 1022 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 2499 transitions. [2021-06-05 23:12:00,981 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 2499 transitions. Word has length 41 [2021-06-05 23:12:00,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:00,981 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 2499 transitions. [2021-06-05 23:12:00,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 2499 transitions. [2021-06-05 23:12:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:12:00,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:00,983 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:01,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:01,203 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:01,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:01,204 INFO L82 PathProgramCache]: Analyzing trace with hash 188453149, now seen corresponding path program 13 times [2021-06-05 23:12:01,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:01,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034875115] [2021-06-05 23:12:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:01,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:01,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034875115] [2021-06-05 23:12:01,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034875115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:01,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796895295] [2021-06-05 23:12:01,379 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:01,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:12:01,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:01,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:01,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:01,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:01,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:01,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:01,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:01,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:01,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:01,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:01,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 23:12:01,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:01,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:01,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:01,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 23:12:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:01,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796895295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:01,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:01,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 23:12:01,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239364308] [2021-06-05 23:12:01,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:12:01,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:01,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:12:01,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:12:01,669 INFO L87 Difference]: Start difference. First operand 1023 states and 2499 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:02,341 INFO L93 Difference]: Finished difference Result 2651 states and 6394 transitions. [2021-06-05 23:12:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:12:02,342 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:12:02,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:02,349 INFO L225 Difference]: With dead ends: 2651 [2021-06-05 23:12:02,349 INFO L226 Difference]: Without dead ends: 2391 [2021-06-05 23:12:02,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 575.9ms TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:12:02,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-05 23:12:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1391. [2021-06-05 23:12:02,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 2.4294964028776977) internal successors, (3377), 1390 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:02,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 3377 transitions. [2021-06-05 23:12:02,377 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 3377 transitions. Word has length 41 [2021-06-05 23:12:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:02,377 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 3377 transitions. [2021-06-05 23:12:02,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:02,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 3377 transitions. [2021-06-05 23:12:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:12:02,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:02,379 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:02,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:02,593 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:02,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1818274531, now seen corresponding path program 14 times [2021-06-05 23:12:02,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:02,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61128397] [2021-06-05 23:12:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:02,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:02,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61128397] [2021-06-05 23:12:02,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61128397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:02,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553518002] [2021-06-05 23:12:02,766 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:02,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:12:02,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:02,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:12:02,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:03,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:03,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:03,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:03,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:03,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:03,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:03,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:03,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:03,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:03,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:03,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:03,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:03,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 23:12:03,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:03,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:03,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:03,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 23:12:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:03,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553518002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:03,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:03,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 23:12:03,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163669751] [2021-06-05 23:12:03,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:12:03,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:03,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:12:03,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:12:03,073 INFO L87 Difference]: Start difference. First operand 1391 states and 3377 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:03,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:03,593 INFO L93 Difference]: Finished difference Result 2655 states and 6510 transitions. [2021-06-05 23:12:03,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:12:03,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:12:03,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:03,602 INFO L225 Difference]: With dead ends: 2655 [2021-06-05 23:12:03,602 INFO L226 Difference]: Without dead ends: 2567 [2021-06-05 23:12:03,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 434.4ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:12:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-06-05 23:12:03,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 1567. [2021-06-05 23:12:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1566 states have (on average 2.4272030651340994) internal successors, (3801), 1566 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:03,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 3801 transitions. [2021-06-05 23:12:03,635 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 3801 transitions. Word has length 41 [2021-06-05 23:12:03,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:03,635 INFO L482 AbstractCegarLoop]: Abstraction has 1567 states and 3801 transitions. [2021-06-05 23:12:03,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 3801 transitions. [2021-06-05 23:12:03,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:12:03,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:03,638 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:03,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 23:12:03,853 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:03,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1021887715, now seen corresponding path program 15 times [2021-06-05 23:12:03,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:03,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224944646] [2021-06-05 23:12:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:04,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:04,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224944646] [2021-06-05 23:12:04,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224944646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:04,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813991082] [2021-06-05 23:12:04,012 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:04,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:12:04,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:04,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 23:12:04,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:04,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:04,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:04,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:04,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:04,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:04,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:04,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:04,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 23:12:04,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:04,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:04,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:04,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 23:12:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:04,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813991082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:04,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:04,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 15 [2021-06-05 23:12:04,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630674681] [2021-06-05 23:12:04,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:12:04,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:04,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:12:04,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:12:04,280 INFO L87 Difference]: Start difference. First operand 1567 states and 3801 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:04,689 INFO L93 Difference]: Finished difference Result 2887 states and 6964 transitions. [2021-06-05 23:12:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:12:04,690 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:12:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:04,695 INFO L225 Difference]: With dead ends: 2887 [2021-06-05 23:12:04,695 INFO L226 Difference]: Without dead ends: 2695 [2021-06-05 23:12:04,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 392.6ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:12:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-06-05 23:12:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 1727. [2021-06-05 23:12:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 2.4281575898030128) internal successors, (4191), 1726 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 4191 transitions. [2021-06-05 23:12:04,729 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 4191 transitions. Word has length 41 [2021-06-05 23:12:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:04,729 INFO L482 AbstractCegarLoop]: Abstraction has 1727 states and 4191 transitions. [2021-06-05 23:12:04,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:04,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 4191 transitions. [2021-06-05 23:12:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:12:04,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:04,733 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:04,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 23:12:04,949 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:04,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:04,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1266351901, now seen corresponding path program 16 times [2021-06-05 23:12:04,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:04,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956563937] [2021-06-05 23:12:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:05,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:05,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956563937] [2021-06-05 23:12:05,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956563937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:05,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497480671] [2021-06-05 23:12:05,124 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:05,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:12:05,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:05,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:12:05,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:05,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:05,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:05,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:05,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:05,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:05,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:05,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:05,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:05,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 23:12:05,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:05,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:05,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:05,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 23:12:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:05,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497480671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:05,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:05,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 23:12:05,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184935046] [2021-06-05 23:12:05,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:12:05,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:05,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:12:05,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:12:05,432 INFO L87 Difference]: Start difference. First operand 1727 states and 4191 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:05,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:05,874 INFO L93 Difference]: Finished difference Result 3015 states and 7407 transitions. [2021-06-05 23:12:05,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:12:05,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:12:05,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:05,878 INFO L225 Difference]: With dead ends: 3015 [2021-06-05 23:12:05,878 INFO L226 Difference]: Without dead ends: 2927 [2021-06-05 23:12:05,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 429.0ms TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:12:05,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-06-05 23:12:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 1727. [2021-06-05 23:12:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 2.4281575898030128) internal successors, (4191), 1726 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 4191 transitions. [2021-06-05 23:12:05,912 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 4191 transitions. Word has length 41 [2021-06-05 23:12:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:05,912 INFO L482 AbstractCegarLoop]: Abstraction has 1727 states and 4191 transitions. [2021-06-05 23:12:05,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:05,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 4191 transitions. [2021-06-05 23:12:05,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:12:05,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:05,915 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:06,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 23:12:06,129 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:06,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1741431069, now seen corresponding path program 17 times [2021-06-05 23:12:06,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:06,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112633478] [2021-06-05 23:12:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:06,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112633478] [2021-06-05 23:12:06,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112633478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98205628] [2021-06-05 23:12:06,294 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:06,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:12:06,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:06,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 23:12:06,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:06,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:06,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:06,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:06,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:06,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:06,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:06,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:06,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:06,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 23:12:06,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:06,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:06,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:06,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 23:12:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:06,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98205628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:06,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:06,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 23:12:06,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704960185] [2021-06-05 23:12:06,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:12:06,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:06,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:12:06,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:12:06,620 INFO L87 Difference]: Start difference. First operand 1727 states and 4191 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:07,221 INFO L93 Difference]: Finished difference Result 2859 states and 6894 transitions. [2021-06-05 23:12:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:12:07,221 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 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 41 [2021-06-05 23:12:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:07,224 INFO L225 Difference]: With dead ends: 2859 [2021-06-05 23:12:07,224 INFO L226 Difference]: Without dead ends: 2583 [2021-06-05 23:12:07,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 456.6ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:12:07,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-06-05 23:12:07,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 1903. [2021-06-05 23:12:07,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1902 states have (on average 2.429547844374343) internal successors, (4621), 1902 states have internal predecessors, (4621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 4621 transitions. [2021-06-05 23:12:07,256 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 4621 transitions. Word has length 41 [2021-06-05 23:12:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:07,256 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 4621 transitions. [2021-06-05 23:12:07,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:07,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 4621 transitions. [2021-06-05 23:12:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:12:07,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:07,260 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:07,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 23:12:07,473 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:07,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:07,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1886074107, now seen corresponding path program 18 times [2021-06-05 23:12:07,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:07,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508216550] [2021-06-05 23:12:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:12:07,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:07,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508216550] [2021-06-05 23:12:07,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508216550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:07,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277924590] [2021-06-05 23:12:07,647 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:07,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:12:07,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:07,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:12:07,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:08,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:08,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:08,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:08,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:08,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:08,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 23:12:08,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:08,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:08,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:08,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:12:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:08,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277924590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:08,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:08,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 23:12:08,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701419209] [2021-06-05 23:12:08,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:12:08,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:08,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:12:08,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:12:08,127 INFO L87 Difference]: Start difference. First operand 1903 states and 4621 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:08,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:08,734 INFO L93 Difference]: Finished difference Result 3311 states and 8145 transitions. [2021-06-05 23:12:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:12:08,734 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:12:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:08,740 INFO L225 Difference]: With dead ends: 3311 [2021-06-05 23:12:08,740 INFO L226 Difference]: Without dead ends: 3247 [2021-06-05 23:12:08,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 576.3ms TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:12:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-06-05 23:12:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 1951. [2021-06-05 23:12:08,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 2.427179487179487) internal successors, (4733), 1950 states have internal predecessors, (4733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 4733 transitions. [2021-06-05 23:12:08,788 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 4733 transitions. Word has length 47 [2021-06-05 23:12:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:08,788 INFO L482 AbstractCegarLoop]: Abstraction has 1951 states and 4733 transitions. [2021-06-05 23:12:08,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:08,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 4733 transitions. [2021-06-05 23:12:08,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:12:08,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:08,792 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:09,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 23:12:09,013 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:09,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:09,013 INFO L82 PathProgramCache]: Analyzing trace with hash -623310085, now seen corresponding path program 19 times [2021-06-05 23:12:09,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:09,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681191855] [2021-06-05 23:12:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:09,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:09,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681191855] [2021-06-05 23:12:09,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681191855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:09,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046459309] [2021-06-05 23:12:09,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:09,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:12:09,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:09,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:09,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:09,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:09,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:09,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:09,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 23:12:09,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:09,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:09,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:09,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:12:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:09,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046459309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:09,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:09,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-06-05 23:12:09,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961369037] [2021-06-05 23:12:09,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:12:09,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:09,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:12:09,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:12:09,609 INFO L87 Difference]: Start difference. First operand 1951 states and 4733 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:10,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:10,219 INFO L93 Difference]: Finished difference Result 2795 states and 6809 transitions. [2021-06-05 23:12:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:12:10,219 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:12:10,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:10,224 INFO L225 Difference]: With dead ends: 2795 [2021-06-05 23:12:10,224 INFO L226 Difference]: Without dead ends: 2735 [2021-06-05 23:12:10,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 684.7ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:12:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2021-06-05 23:12:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 1775. [2021-06-05 23:12:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1774 states have (on average 2.4255918827508456) internal successors, (4303), 1774 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 4303 transitions. [2021-06-05 23:12:10,257 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 4303 transitions. Word has length 47 [2021-06-05 23:12:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:10,257 INFO L482 AbstractCegarLoop]: Abstraction has 1775 states and 4303 transitions. [2021-06-05 23:12:10,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 4303 transitions. [2021-06-05 23:12:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:12:10,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:10,260 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:10,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:10,484 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:10,485 INFO L82 PathProgramCache]: Analyzing trace with hash 509730555, now seen corresponding path program 20 times [2021-06-05 23:12:10,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:10,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651301763] [2021-06-05 23:12:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:10,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:10,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651301763] [2021-06-05 23:12:10,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651301763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:10,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807547273] [2021-06-05 23:12:10,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:10,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:12:10,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:10,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:12:10,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:11,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:11,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:11,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:11,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:11,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:11,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 23:12:11,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:11,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:11,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:11,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:12:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:11,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807547273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:11,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:11,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 23:12:11,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147974305] [2021-06-05 23:12:11,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:12:11,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:11,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:12:11,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:12:11,046 INFO L87 Difference]: Start difference. First operand 1775 states and 4303 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:11,724 INFO L93 Difference]: Finished difference Result 3447 states and 8527 transitions. [2021-06-05 23:12:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:12:11,725 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:12:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:11,730 INFO L225 Difference]: With dead ends: 3447 [2021-06-05 23:12:11,730 INFO L226 Difference]: Without dead ends: 3359 [2021-06-05 23:12:11,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 568.5ms TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:12:11,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2021-06-05 23:12:11,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 1535. [2021-06-05 23:12:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 2.4400260756192957) internal successors, (3743), 1534 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 3743 transitions. [2021-06-05 23:12:11,763 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 3743 transitions. Word has length 47 [2021-06-05 23:12:11,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:11,763 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 3743 transitions. [2021-06-05 23:12:11,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:11,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 3743 transitions. [2021-06-05 23:12:11,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:12:11,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:11,765 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:11,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 23:12:11,981 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2131831045, now seen corresponding path program 21 times [2021-06-05 23:12:11,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:11,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450134046] [2021-06-05 23:12:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:12:12,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:12,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450134046] [2021-06-05 23:12:12,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450134046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:12,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620610835] [2021-06-05 23:12:12,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:12,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:12:12,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:12,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:12:12,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:12,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:12,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:12,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:12,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:12,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:12,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 36 [2021-06-05 23:12:12,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:12,765 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:12:12,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:12,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:104, output treesize:7 [2021-06-05 23:12:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:12,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620610835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:12,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:12,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 23:12:12,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937994249] [2021-06-05 23:12:12,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:12:12,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:12,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:12:12,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:12:12,778 INFO L87 Difference]: Start difference. First operand 1535 states and 3743 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:13,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:13,953 INFO L93 Difference]: Finished difference Result 2779 states and 6803 transitions. [2021-06-05 23:12:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:12:13,954 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:12:13,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:13,958 INFO L225 Difference]: With dead ends: 2779 [2021-06-05 23:12:13,958 INFO L226 Difference]: Without dead ends: 2591 [2021-06-05 23:12:13,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 867.1ms TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:12:13,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2021-06-05 23:12:13,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1679. [2021-06-05 23:12:13,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 2.435637663885578) internal successors, (4087), 1678 states have internal predecessors, (4087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:13,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 4087 transitions. [2021-06-05 23:12:13,988 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 4087 transitions. Word has length 47 [2021-06-05 23:12:13,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:13,988 INFO L482 AbstractCegarLoop]: Abstraction has 1679 states and 4087 transitions. [2021-06-05 23:12:13,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:13,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 4087 transitions. [2021-06-05 23:12:13,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:12:13,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:13,991 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:14,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:14,214 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:14,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:14,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1991114501, now seen corresponding path program 22 times [2021-06-05 23:12:14,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:14,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090974172] [2021-06-05 23:12:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:14,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:14,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090974172] [2021-06-05 23:12:14,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090974172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:14,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822793459] [2021-06-05 23:12:14,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:14,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:12:14,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:14,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:12:14,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:14,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:14,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:14,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:14,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:14,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:14,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 23:12:14,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:14,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:14,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:14,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:12:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:14,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822793459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:14,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:14,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 23:12:14,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928180724] [2021-06-05 23:12:14,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:12:14,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:14,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:12:14,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:12:14,826 INFO L87 Difference]: Start difference. First operand 1679 states and 4087 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:15,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:15,360 INFO L93 Difference]: Finished difference Result 3239 states and 8031 transitions. [2021-06-05 23:12:15,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:12:15,360 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:12:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:15,363 INFO L225 Difference]: With dead ends: 3239 [2021-06-05 23:12:15,364 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 23:12:15,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 626.1ms TimeCoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:12:15,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 23:12:15,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 1487. [2021-06-05 23:12:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.4488559892328396) internal successors, (3639), 1486 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 3639 transitions. [2021-06-05 23:12:15,395 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 3639 transitions. Word has length 47 [2021-06-05 23:12:15,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:15,395 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 3639 transitions. [2021-06-05 23:12:15,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:15,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 3639 transitions. [2021-06-05 23:12:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:12:15,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:15,398 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:15,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 23:12:15,621 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:15,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:15,621 INFO L82 PathProgramCache]: Analyzing trace with hash 93498107, now seen corresponding path program 23 times [2021-06-05 23:12:15,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:15,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755941439] [2021-06-05 23:12:15,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:15,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:15,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755941439] [2021-06-05 23:12:15,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755941439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:15,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565243661] [2021-06-05 23:12:15,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:15,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:12:15,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:15,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:12:15,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:16,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:16,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:16,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:16,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:16,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 23:12:16,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:16,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:16,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:16,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:12:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:16,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565243661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:16,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:16,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 23:12:16,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187644254] [2021-06-05 23:12:16,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:12:16,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:16,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:12:16,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:12:16,321 INFO L87 Difference]: Start difference. First operand 1487 states and 3639 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:16,959 INFO L93 Difference]: Finished difference Result 2771 states and 6747 transitions. [2021-06-05 23:12:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:12:16,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:12:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:16,962 INFO L225 Difference]: With dead ends: 2771 [2021-06-05 23:12:16,962 INFO L226 Difference]: Without dead ends: 2479 [2021-06-05 23:12:16,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 659.4ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:12:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2021-06-05 23:12:16,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 1727. [2021-06-05 23:12:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 2.437427578215527) internal successors, (4207), 1726 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 4207 transitions. [2021-06-05 23:12:16,988 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 4207 transitions. Word has length 47 [2021-06-05 23:12:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:16,988 INFO L482 AbstractCegarLoop]: Abstraction has 1727 states and 4207 transitions. [2021-06-05 23:12:16,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 4207 transitions. [2021-06-05 23:12:16,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:12:16,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:16,991 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:17,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:17,211 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash -465548037, now seen corresponding path program 24 times [2021-06-05 23:12:17,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:17,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937596277] [2021-06-05 23:12:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:17,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:17,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937596277] [2021-06-05 23:12:17,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937596277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:17,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180530435] [2021-06-05 23:12:17,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:17,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:12:17,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:17,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:12:17,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:18,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:18,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:18,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:18,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:18,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:18,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:18,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:18,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:18,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:18,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:18,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:18,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:18,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:18,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:18,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:18,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:18,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 36 [2021-06-05 23:12:18,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:18,263 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 23:12:18,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:18,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:105, output treesize:7 [2021-06-05 23:12:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:18,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180530435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:18,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:18,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 23:12:18,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673655946] [2021-06-05 23:12:18,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:12:18,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:18,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:12:18,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:12:18,278 INFO L87 Difference]: Start difference. First operand 1727 states and 4207 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:21,471 INFO L93 Difference]: Finished difference Result 3635 states and 8859 transitions. [2021-06-05 23:12:21,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:12:21,472 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:12:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:21,475 INFO L225 Difference]: With dead ends: 3635 [2021-06-05 23:12:21,475 INFO L226 Difference]: Without dead ends: 3279 [2021-06-05 23:12:21,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1659.1ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:12:21,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-06-05 23:12:21,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 1775. [2021-06-05 23:12:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1774 states have (on average 2.4436302142051862) internal successors, (4335), 1774 states have internal predecessors, (4335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 4335 transitions. [2021-06-05 23:12:21,505 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 4335 transitions. Word has length 47 [2021-06-05 23:12:21,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:21,505 INFO L482 AbstractCegarLoop]: Abstraction has 1775 states and 4335 transitions. [2021-06-05 23:12:21,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:21,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 4335 transitions. [2021-06-05 23:12:21,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:12:21,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:21,508 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:21,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 23:12:21,729 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2011837691, now seen corresponding path program 25 times [2021-06-05 23:12:21,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:21,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791301390] [2021-06-05 23:12:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:21,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:21,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791301390] [2021-06-05 23:12:21,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791301390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:21,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345725521] [2021-06-05 23:12:21,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:21,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:12:21,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:22,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:22,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:22,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:22,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:22,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:22,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:22,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:22,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:22,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:22,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:22,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:22,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:22,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:22,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:22,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:22,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:22,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 23:12:22,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:22,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:22,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:22,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:12:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:22,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345725521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:22,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:22,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-06-05 23:12:22,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21511642] [2021-06-05 23:12:22,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:12:22,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:22,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:12:22,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:12:22,344 INFO L87 Difference]: Start difference. First operand 1775 states and 4335 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:23,204 INFO L93 Difference]: Finished difference Result 3459 states and 8391 transitions. [2021-06-05 23:12:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:12:23,204 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:12:23,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:23,207 INFO L225 Difference]: With dead ends: 3459 [2021-06-05 23:12:23,207 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 23:12:23,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 818.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:12:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 23:12:23,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2079. [2021-06-05 23:12:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 2.433589990375361) internal successors, (5057), 2078 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 5057 transitions. [2021-06-05 23:12:23,238 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 5057 transitions. Word has length 47 [2021-06-05 23:12:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:23,238 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 5057 transitions. [2021-06-05 23:12:23,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:23,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 5057 transitions. [2021-06-05 23:12:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:12:23,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:23,241 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:23,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:23,457 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:23,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:23,457 INFO L82 PathProgramCache]: Analyzing trace with hash 795539707, now seen corresponding path program 26 times [2021-06-05 23:12:23,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:23,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726219168] [2021-06-05 23:12:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:23,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:23,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726219168] [2021-06-05 23:12:23,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726219168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:23,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212650639] [2021-06-05 23:12:23,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:23,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:12:23,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:23,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:12:23,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:23,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:23,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:23,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:23,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 23:12:23,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:23,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:23,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:23,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:12:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:23,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212650639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:23,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:23,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-06-05 23:12:23,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966429208] [2021-06-05 23:12:23,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:12:23,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:23,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:12:23,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:12:23,993 INFO L87 Difference]: Start difference. First operand 2079 states and 5057 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:24,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:24,869 INFO L93 Difference]: Finished difference Result 3203 states and 7713 transitions. [2021-06-05 23:12:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:12:24,871 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:12:24,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:24,874 INFO L225 Difference]: With dead ends: 3203 [2021-06-05 23:12:24,874 INFO L226 Difference]: Without dead ends: 2875 [2021-06-05 23:12:24,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 738.9ms TimeCoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:12:24,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-06-05 23:12:24,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 1595. [2021-06-05 23:12:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 2.4084065244667503) internal successors, (3839), 1594 states have internal predecessors, (3839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 3839 transitions. [2021-06-05 23:12:24,895 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 3839 transitions. Word has length 47 [2021-06-05 23:12:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:24,895 INFO L482 AbstractCegarLoop]: Abstraction has 1595 states and 3839 transitions. [2021-06-05 23:12:24,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 3839 transitions. [2021-06-05 23:12:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:12:24,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:24,897 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:25,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 23:12:25,110 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:25,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:25,111 INFO L82 PathProgramCache]: Analyzing trace with hash -281774341, now seen corresponding path program 27 times [2021-06-05 23:12:25,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:25,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790562710] [2021-06-05 23:12:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:25,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:25,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790562710] [2021-06-05 23:12:25,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790562710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:25,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821968282] [2021-06-05 23:12:25,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:25,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:12:25,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:25,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:12:25,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:25,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:25,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:25,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:25,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:25,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:25,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:25,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:25,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:25,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:25,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:25,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:25,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:25,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:25,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 23:12:25,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:25,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:25,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:25,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:12:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:25,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821968282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:25,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:25,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 23:12:25,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702465389] [2021-06-05 23:12:25,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:12:25,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:25,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:12:25,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:12:25,701 INFO L87 Difference]: Start difference. First operand 1595 states and 3839 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:26,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:26,327 INFO L93 Difference]: Finished difference Result 2927 states and 7131 transitions. [2021-06-05 23:12:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:12:26,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:12:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:26,330 INFO L225 Difference]: With dead ends: 2927 [2021-06-05 23:12:26,330 INFO L226 Difference]: Without dead ends: 2795 [2021-06-05 23:12:26,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 582.0ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:12:26,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-06-05 23:12:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 1659. [2021-06-05 23:12:26,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 2.4119420989143547) internal successors, (3999), 1658 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 3999 transitions. [2021-06-05 23:12:26,351 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 3999 transitions. Word has length 47 [2021-06-05 23:12:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:26,351 INFO L482 AbstractCegarLoop]: Abstraction has 1659 states and 3999 transitions. [2021-06-05 23:12:26,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 3999 transitions. [2021-06-05 23:12:26,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:12:26,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:26,354 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:26,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:26,569 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:26,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:26,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1629840645, now seen corresponding path program 28 times [2021-06-05 23:12:26,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:26,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413344587] [2021-06-05 23:12:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:26,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:26,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413344587] [2021-06-05 23:12:26,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413344587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:26,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828425899] [2021-06-05 23:12:26,797 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:26,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:12:26,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:26,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:12:26,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:27,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:27,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:27,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:27,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:27,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:27,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:27,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:27,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:27,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:27,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:27,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:27,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 23:12:27,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:27,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:27,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:27,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:12:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:27,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828425899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:27,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:27,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-06-05 23:12:27,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347953387] [2021-06-05 23:12:27,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:12:27,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:27,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:12:27,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:12:27,136 INFO L87 Difference]: Start difference. First operand 1659 states and 3999 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:28,015 INFO L93 Difference]: Finished difference Result 3391 states and 8167 transitions. [2021-06-05 23:12:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:12:28,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:12:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:28,019 INFO L225 Difference]: With dead ends: 3391 [2021-06-05 23:12:28,019 INFO L226 Difference]: Without dead ends: 3063 [2021-06-05 23:12:28,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 769.1ms TimeCoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:12:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3063 states. [2021-06-05 23:12:28,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3063 to 2039. [2021-06-05 23:12:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 2.4077526987242392) internal successors, (4907), 2038 states have internal predecessors, (4907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 4907 transitions. [2021-06-05 23:12:28,050 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 4907 transitions. Word has length 47 [2021-06-05 23:12:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:28,050 INFO L482 AbstractCegarLoop]: Abstraction has 2039 states and 4907 transitions. [2021-06-05 23:12:28,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 4907 transitions. [2021-06-05 23:12:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:12:28,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:28,053 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:28,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 23:12:28,269 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:28,269 INFO L82 PathProgramCache]: Analyzing trace with hash -637516549, now seen corresponding path program 29 times [2021-06-05 23:12:28,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:28,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493963303] [2021-06-05 23:12:28,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:28,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:28,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493963303] [2021-06-05 23:12:28,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493963303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:28,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318605260] [2021-06-05 23:12:28,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:28,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:12:28,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:28,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:12:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:28,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:28,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:28,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:28,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:28,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:28,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:28,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:28,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:28,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:28,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:28,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:28,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:28,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:28,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:28,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 23:12:28,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:28,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:28,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:28,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:12:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:28,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318605260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:28,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:28,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-06-05 23:12:28,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138635591] [2021-06-05 23:12:28,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:12:28,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:28,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:12:28,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:12:28,847 INFO L87 Difference]: Start difference. First operand 2039 states and 4907 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:29,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:29,406 INFO L93 Difference]: Finished difference Result 4059 states and 9831 transitions. [2021-06-05 23:12:29,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:12:29,406 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:12:29,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:29,410 INFO L225 Difference]: With dead ends: 4059 [2021-06-05 23:12:29,410 INFO L226 Difference]: Without dead ends: 3783 [2021-06-05 23:12:29,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 636.3ms TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:12:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3783 states. [2021-06-05 23:12:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3783 to 2055. [2021-06-05 23:12:29,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.408471275559883) internal successors, (4947), 2054 states have internal predecessors, (4947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 4947 transitions. [2021-06-05 23:12:29,445 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 4947 transitions. Word has length 47 [2021-06-05 23:12:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:29,445 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 4947 transitions. [2021-06-05 23:12:29,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:29,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 4947 transitions. [2021-06-05 23:12:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:12:29,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:29,448 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:29,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 23:12:29,670 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:29,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1587812603, now seen corresponding path program 30 times [2021-06-05 23:12:29,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:29,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979151259] [2021-06-05 23:12:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:29,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:29,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979151259] [2021-06-05 23:12:29,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979151259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:29,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295630461] [2021-06-05 23:12:29,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:29,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:12:29,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:29,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:12:29,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:30,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:30,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:30,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:30,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:30,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:30,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:30,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:30,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:30,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:30,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:30,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:30,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 23:12:30,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:30,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:30,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:30,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:12:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:30,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295630461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:30,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:30,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 23:12:30,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967700128] [2021-06-05 23:12:30,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:12:30,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:30,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:12:30,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:12:30,274 INFO L87 Difference]: Start difference. First operand 2055 states and 4947 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:30,848 INFO L93 Difference]: Finished difference Result 3563 states and 8687 transitions. [2021-06-05 23:12:30,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:12:30,848 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:12:30,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:30,851 INFO L225 Difference]: With dead ends: 3563 [2021-06-05 23:12:30,851 INFO L226 Difference]: Without dead ends: 3479 [2021-06-05 23:12:30,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 642.6ms TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:12:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2021-06-05 23:12:30,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 2167. [2021-06-05 23:12:30,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.4132040627885503) internal successors, (5227), 2166 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:30,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 5227 transitions. [2021-06-05 23:12:30,876 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 5227 transitions. Word has length 47 [2021-06-05 23:12:30,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:30,876 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 5227 transitions. [2021-06-05 23:12:30,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:30,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 5227 transitions. [2021-06-05 23:12:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:12:30,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:30,878 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:31,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 23:12:31,079 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:31,079 INFO L82 PathProgramCache]: Analyzing trace with hash -849198341, now seen corresponding path program 31 times [2021-06-05 23:12:31,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:31,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150805732] [2021-06-05 23:12:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:31,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:31,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150805732] [2021-06-05 23:12:31,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150805732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:31,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593183528] [2021-06-05 23:12:31,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:31,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:12:31,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:31,582 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 23:12:31,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 23:12:31,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:31,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:31,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:31,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-06-05 23:12:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:31,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593183528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:31,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:31,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 23:12:31,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687077029] [2021-06-05 23:12:31,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:12:31,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:31,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:12:31,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:12:31,598 INFO L87 Difference]: Start difference. First operand 2167 states and 5227 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:32,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:32,155 INFO L93 Difference]: Finished difference Result 3035 states and 7367 transitions. [2021-06-05 23:12:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:12:32,156 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 23:12:32,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:32,158 INFO L225 Difference]: With dead ends: 3035 [2021-06-05 23:12:32,158 INFO L226 Difference]: Without dead ends: 2999 [2021-06-05 23:12:32,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 553.3ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:12:32,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2021-06-05 23:12:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 2199. [2021-06-05 23:12:32,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 2.414467697907188) internal successors, (5307), 2198 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 5307 transitions. [2021-06-05 23:12:32,177 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 5307 transitions. Word has length 47 [2021-06-05 23:12:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:32,177 INFO L482 AbstractCegarLoop]: Abstraction has 2199 states and 5307 transitions. [2021-06-05 23:12:32,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 5307 transitions. [2021-06-05 23:12:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:12:32,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:32,180 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:32,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 23:12:32,380 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:32,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1873760509, now seen corresponding path program 32 times [2021-06-05 23:12:32,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:32,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922636231] [2021-06-05 23:12:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 32 proven. 38 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:12:32,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:32,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922636231] [2021-06-05 23:12:32,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922636231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:32,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501881682] [2021-06-05 23:12:32,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:32,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:12:32,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:32,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:12:32,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:12:32,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501881682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:32,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:32,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 23:12:32,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18783117] [2021-06-05 23:12:32,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:12:32,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:32,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:12:32,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:12:32,530 INFO L87 Difference]: Start difference. First operand 2199 states and 5307 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:32,562 INFO L93 Difference]: Finished difference Result 3179 states and 7642 transitions. [2021-06-05 23:12:32,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:12:32,562 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:12:32,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:32,565 INFO L225 Difference]: With dead ends: 3179 [2021-06-05 23:12:32,566 INFO L226 Difference]: Without dead ends: 3171 [2021-06-05 23:12:32,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:12:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2021-06-05 23:12:32,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 2767. [2021-06-05 23:12:32,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2766 states have (on average 2.447939262472885) internal successors, (6771), 2766 states have internal predecessors, (6771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:32,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 6771 transitions. [2021-06-05 23:12:32,588 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 6771 transitions. Word has length 49 [2021-06-05 23:12:32,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:32,588 INFO L482 AbstractCegarLoop]: Abstraction has 2767 states and 6771 transitions. [2021-06-05 23:12:32,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 6771 transitions. [2021-06-05 23:12:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:12:32,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:32,590 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:32,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 23:12:32,791 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:32,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2040143101, now seen corresponding path program 33 times [2021-06-05 23:12:32,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:32,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972330808] [2021-06-05 23:12:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:32,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:32,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972330808] [2021-06-05 23:12:32,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972330808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:32,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371698572] [2021-06-05 23:12:32,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:32,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:12:32,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:32,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:12:32,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:12:32,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371698572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:32,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:32,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 23:12:32,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927551157] [2021-06-05 23:12:32,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:12:32,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:32,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:12:32,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:12:32,948 INFO L87 Difference]: Start difference. First operand 2767 states and 6771 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:32,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:32,988 INFO L93 Difference]: Finished difference Result 4039 states and 9821 transitions. [2021-06-05 23:12:32,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:12:32,988 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:12:32,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:32,993 INFO L225 Difference]: With dead ends: 4039 [2021-06-05 23:12:32,993 INFO L226 Difference]: Without dead ends: 4031 [2021-06-05 23:12:32,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:12:32,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2021-06-05 23:12:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 2975. [2021-06-05 23:12:33,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 2.456960322797579) internal successors, (7307), 2974 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 7307 transitions. [2021-06-05 23:12:33,034 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 7307 transitions. Word has length 49 [2021-06-05 23:12:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:33,035 INFO L482 AbstractCegarLoop]: Abstraction has 2975 states and 7307 transitions. [2021-06-05 23:12:33,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:33,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 7307 transitions. [2021-06-05 23:12:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:33,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:33,040 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:33,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 23:12:33,253 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1607749511, now seen corresponding path program 34 times [2021-06-05 23:12:33,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:33,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139571078] [2021-06-05 23:12:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:33,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:33,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139571078] [2021-06-05 23:12:33,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139571078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:33,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251096769] [2021-06-05 23:12:33,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:33,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:12:33,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:33,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:12:33,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:34,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:34,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:34,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:34,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:34,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:34,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:34,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:12:34,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:34,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:34,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:34,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:12:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:34,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251096769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:34,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:34,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 25 [2021-06-05 23:12:34,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763191247] [2021-06-05 23:12:34,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:12:34,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:34,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:12:34,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:12:34,106 INFO L87 Difference]: Start difference. First operand 2975 states and 7307 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:35,332 INFO L93 Difference]: Finished difference Result 6999 states and 17467 transitions. [2021-06-05 23:12:35,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:12:35,332 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:12:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:35,337 INFO L225 Difference]: With dead ends: 6999 [2021-06-05 23:12:35,337 INFO L226 Difference]: Without dead ends: 6863 [2021-06-05 23:12:35,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 970.8ms TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:12:35,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6863 states. [2021-06-05 23:12:35,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6863 to 3231. [2021-06-05 23:12:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 3230 states have (on average 2.4554179566563468) internal successors, (7931), 3230 states have internal predecessors, (7931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 7931 transitions. [2021-06-05 23:12:35,387 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 7931 transitions. Word has length 53 [2021-06-05 23:12:35,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:35,387 INFO L482 AbstractCegarLoop]: Abstraction has 3231 states and 7931 transitions. [2021-06-05 23:12:35,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:35,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 7931 transitions. [2021-06-05 23:12:35,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:35,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:35,390 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:35,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 23:12:35,592 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:35,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1426435463, now seen corresponding path program 35 times [2021-06-05 23:12:35,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:35,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438952024] [2021-06-05 23:12:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:35,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:35,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438952024] [2021-06-05 23:12:35,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438952024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:35,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345602388] [2021-06-05 23:12:35,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:35,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:12:35,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:35,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:12:35,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:36,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:36,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:36,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:36,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:36,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:36,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:36,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:36,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2021-06-05 23:12:36,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:36,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:36,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:36,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:3 [2021-06-05 23:12:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:36,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345602388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:36,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:36,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 23:12:36,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482807051] [2021-06-05 23:12:36,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:12:36,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:36,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:12:36,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:12:36,477 INFO L87 Difference]: Start difference. First operand 3231 states and 7931 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:37,389 INFO L93 Difference]: Finished difference Result 6839 states and 17099 transitions. [2021-06-05 23:12:37,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:12:37,390 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:12:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:37,396 INFO L225 Difference]: With dead ends: 6839 [2021-06-05 23:12:37,396 INFO L226 Difference]: Without dead ends: 6703 [2021-06-05 23:12:37,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 951.2ms TimeCoverageRelationStatistics Valid=247, Invalid=2105, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:12:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6703 states. [2021-06-05 23:12:37,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6703 to 2751. [2021-06-05 23:12:37,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2750 states have (on average 2.4592727272727273) internal successors, (6763), 2750 states have internal predecessors, (6763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 6763 transitions. [2021-06-05 23:12:37,431 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 6763 transitions. Word has length 53 [2021-06-05 23:12:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:37,431 INFO L482 AbstractCegarLoop]: Abstraction has 2751 states and 6763 transitions. [2021-06-05 23:12:37,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 6763 transitions. [2021-06-05 23:12:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:37,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:37,434 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:37,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:37,635 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:37,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:37,635 INFO L82 PathProgramCache]: Analyzing trace with hash -602883975, now seen corresponding path program 36 times [2021-06-05 23:12:37,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:37,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344754253] [2021-06-05 23:12:37,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:37,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:37,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344754253] [2021-06-05 23:12:37,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344754253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:37,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751503049] [2021-06-05 23:12:37,829 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:37,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:12:37,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:37,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:12:37,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:38,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:38,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:38,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:38,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:38,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:38,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:38,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:12:38,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:38,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:38,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:38,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:12:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:38,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751503049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:38,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:38,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 24 [2021-06-05 23:12:38,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279437373] [2021-06-05 23:12:38,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:12:38,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:38,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:12:38,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:12:38,309 INFO L87 Difference]: Start difference. First operand 2751 states and 6763 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:39,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:39,048 INFO L93 Difference]: Finished difference Result 5519 states and 13767 transitions. [2021-06-05 23:12:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:12:39,048 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:12:39,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:39,053 INFO L225 Difference]: With dead ends: 5519 [2021-06-05 23:12:39,053 INFO L226 Difference]: Without dead ends: 5231 [2021-06-05 23:12:39,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 748.9ms TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:12:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5231 states. [2021-06-05 23:12:39,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5231 to 2911. [2021-06-05 23:12:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 2.4560137457044675) internal successors, (7147), 2910 states have internal predecessors, (7147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 7147 transitions. [2021-06-05 23:12:39,114 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 7147 transitions. Word has length 53 [2021-06-05 23:12:39,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:39,114 INFO L482 AbstractCegarLoop]: Abstraction has 2911 states and 7147 transitions. [2021-06-05 23:12:39,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:39,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 7147 transitions. [2021-06-05 23:12:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:39,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:39,117 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:39,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:39,318 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:39,318 INFO L82 PathProgramCache]: Analyzing trace with hash -627868551, now seen corresponding path program 37 times [2021-06-05 23:12:39,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:39,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937761729] [2021-06-05 23:12:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:39,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:39,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937761729] [2021-06-05 23:12:39,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937761729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:39,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381300128] [2021-06-05 23:12:39,555 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:39,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:12:39,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:40,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:40,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:40,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:40,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:40,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:40,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:40,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:12:40,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:40,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:40,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:40,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:12:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:40,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381300128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:40,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:40,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-06-05 23:12:40,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151405233] [2021-06-05 23:12:40,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:12:40,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:40,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:12:40,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:12:40,118 INFO L87 Difference]: Start difference. First operand 2911 states and 7147 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:40,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:40,776 INFO L93 Difference]: Finished difference Result 5847 states and 14547 transitions. [2021-06-05 23:12:40,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:12:40,776 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:12:40,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:40,781 INFO L225 Difference]: With dead ends: 5847 [2021-06-05 23:12:40,781 INFO L226 Difference]: Without dead ends: 5759 [2021-06-05 23:12:40,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 822.4ms TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:12:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5759 states. [2021-06-05 23:12:40,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5759 to 2879. [2021-06-05 23:12:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.4555246699096593) internal successors, (7067), 2878 states have internal predecessors, (7067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 7067 transitions. [2021-06-05 23:12:40,830 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 7067 transitions. Word has length 53 [2021-06-05 23:12:40,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:40,830 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 7067 transitions. [2021-06-05 23:12:40,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:40,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 7067 transitions. [2021-06-05 23:12:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:40,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:40,834 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:41,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:41,049 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:41,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:41,050 INFO L82 PathProgramCache]: Analyzing trace with hash 656678521, now seen corresponding path program 38 times [2021-06-05 23:12:41,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:41,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710223585] [2021-06-05 23:12:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:41,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:41,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710223585] [2021-06-05 23:12:41,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710223585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:41,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480032081] [2021-06-05 23:12:41,322 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:41,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:12:41,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:41,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:12:41,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:41,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:41,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:41,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:41,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:41,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:41,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:41,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:12:41,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:41,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:41,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:41,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:12:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:41,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480032081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:41,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:41,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-06-05 23:12:41,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891647728] [2021-06-05 23:12:41,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:12:41,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:41,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:12:41,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:12:41,850 INFO L87 Difference]: Start difference. First operand 2879 states and 7067 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:42,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:42,758 INFO L93 Difference]: Finished difference Result 4567 states and 11291 transitions. [2021-06-05 23:12:42,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:12:42,758 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:12:42,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:42,762 INFO L225 Difference]: With dead ends: 4567 [2021-06-05 23:12:42,762 INFO L226 Difference]: Without dead ends: 4527 [2021-06-05 23:12:42,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 780.9ms TimeCoverageRelationStatistics Valid=191, Invalid=1531, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:12:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4527 states. [2021-06-05 23:12:42,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4527 to 2911. [2021-06-05 23:12:42,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 2.4560137457044675) internal successors, (7147), 2910 states have internal predecessors, (7147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 7147 transitions. [2021-06-05 23:12:42,818 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 7147 transitions. Word has length 53 [2021-06-05 23:12:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:42,819 INFO L482 AbstractCegarLoop]: Abstraction has 2911 states and 7147 transitions. [2021-06-05 23:12:42,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 7147 transitions. [2021-06-05 23:12:42,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:42,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:42,823 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:43,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 23:12:43,045 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:43,045 INFO L82 PathProgramCache]: Analyzing trace with hash -159589767, now seen corresponding path program 39 times [2021-06-05 23:12:43,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:43,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974029154] [2021-06-05 23:12:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:12:43,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:43,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974029154] [2021-06-05 23:12:43,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974029154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707014497] [2021-06-05 23:12:43,278 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:43,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:12:43,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:43,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:12:43,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:43,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:43,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:43,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:43,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:43,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:43,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:12:43,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:43,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:43,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:43,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:12:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:43,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707014497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:43,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:43,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-06-05 23:12:43,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024907029] [2021-06-05 23:12:43,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:12:43,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:43,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:12:43,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:12:43,808 INFO L87 Difference]: Start difference. First operand 2911 states and 7147 transitions. Second operand has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:45,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:45,065 INFO L93 Difference]: Finished difference Result 6415 states and 15812 transitions. [2021-06-05 23:12:45,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:12:45,065 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:12:45,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:45,069 INFO L225 Difference]: With dead ends: 6415 [2021-06-05 23:12:45,069 INFO L226 Difference]: Without dead ends: 6007 [2021-06-05 23:12:45,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1131.2ms TimeCoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:12:45,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6007 states. [2021-06-05 23:12:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6007 to 3503. [2021-06-05 23:12:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.454311821816105) internal successors, (8595), 3502 states have internal predecessors, (8595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 8595 transitions. [2021-06-05 23:12:45,105 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 8595 transitions. Word has length 53 [2021-06-05 23:12:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:45,105 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 8595 transitions. [2021-06-05 23:12:45,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 8595 transitions. [2021-06-05 23:12:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:45,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:45,109 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:45,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:45,310 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:45,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:45,310 INFO L82 PathProgramCache]: Analyzing trace with hash -184574343, now seen corresponding path program 40 times [2021-06-05 23:12:45,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:45,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127759040] [2021-06-05 23:12:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:45,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:45,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127759040] [2021-06-05 23:12:45,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127759040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:45,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658662406] [2021-06-05 23:12:45,580 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:45,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:12:45,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:45,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:12:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:46,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:46,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:46,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:46,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:46,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:46,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:12:46,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:46,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:46,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:46,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:12:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:46,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658662406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:46,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:46,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-06-05 23:12:46,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537449518] [2021-06-05 23:12:46,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:12:46,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:46,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:12:46,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:12:46,138 INFO L87 Difference]: Start difference. First operand 3503 states and 8595 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:46,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:46,988 INFO L93 Difference]: Finished difference Result 6639 states and 16432 transitions. [2021-06-05 23:12:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:12:46,988 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:12:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:46,994 INFO L225 Difference]: With dead ends: 6639 [2021-06-05 23:12:46,994 INFO L226 Difference]: Without dead ends: 6551 [2021-06-05 23:12:46,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 921.8ms TimeCoverageRelationStatistics Valid=223, Invalid=1757, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:12:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2021-06-05 23:12:47,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 3455. [2021-06-05 23:12:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 3454 states have (on average 2.4536768963520554) internal successors, (8475), 3454 states have internal predecessors, (8475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 8475 transitions. [2021-06-05 23:12:47,042 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 8475 transitions. Word has length 53 [2021-06-05 23:12:47,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:47,042 INFO L482 AbstractCegarLoop]: Abstraction has 3455 states and 8475 transitions. [2021-06-05 23:12:47,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 8475 transitions. [2021-06-05 23:12:47,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:47,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:47,046 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:47,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:47,246 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:47,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:47,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1099972729, now seen corresponding path program 41 times [2021-06-05 23:12:47,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:47,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180567273] [2021-06-05 23:12:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:47,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:47,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180567273] [2021-06-05 23:12:47,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180567273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:47,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51564086] [2021-06-05 23:12:47,479 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:47,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:12:47,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:47,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 23:12:47,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:47,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:47,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:47,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:47,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:47,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:47,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:12:47,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:47,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:47,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:47,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:12:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:48,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51564086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:48,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:48,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-06-05 23:12:48,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251631243] [2021-06-05 23:12:48,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:12:48,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:48,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:12:48,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:12:48,009 INFO L87 Difference]: Start difference. First operand 3455 states and 8475 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:48,975 INFO L93 Difference]: Finished difference Result 5815 states and 14356 transitions. [2021-06-05 23:12:48,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:12:48,976 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:12:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:48,981 INFO L225 Difference]: With dead ends: 5815 [2021-06-05 23:12:48,981 INFO L226 Difference]: Without dead ends: 5463 [2021-06-05 23:12:48,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 872.7ms TimeCoverageRelationStatistics Valid=223, Invalid=1757, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:12:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2021-06-05 23:12:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 3647. [2021-06-05 23:12:49,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3647 states, 3646 states have (on average 2.453922106417992) internal successors, (8947), 3646 states have internal predecessors, (8947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:49,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 3647 states and 8947 transitions. [2021-06-05 23:12:49,019 INFO L78 Accepts]: Start accepts. Automaton has 3647 states and 8947 transitions. Word has length 53 [2021-06-05 23:12:49,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:49,019 INFO L482 AbstractCegarLoop]: Abstraction has 3647 states and 8947 transitions. [2021-06-05 23:12:49,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:49,019 INFO L276 IsEmpty]: Start isEmpty. Operand 3647 states and 8947 transitions. [2021-06-05 23:12:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:49,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:49,023 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:49,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 23:12:49,235 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:49,235 INFO L82 PathProgramCache]: Analyzing trace with hash 435643001, now seen corresponding path program 42 times [2021-06-05 23:12:49,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:49,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446485213] [2021-06-05 23:12:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:12:49,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:49,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446485213] [2021-06-05 23:12:49,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446485213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:49,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685422295] [2021-06-05 23:12:49,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:49,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:12:49,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:49,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:12:49,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:49,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:49,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:49,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:49,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:49,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:12:49,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:49,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:49,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:49,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:12:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:49,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685422295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:49,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:49,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 21 [2021-06-05 23:12:49,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236788192] [2021-06-05 23:12:49,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:12:49,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:49,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:12:49,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:12:49,872 INFO L87 Difference]: Start difference. First operand 3647 states and 8947 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:50,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:50,486 INFO L93 Difference]: Finished difference Result 5723 states and 14082 transitions. [2021-06-05 23:12:50,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:12:50,486 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:12:50,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:50,491 INFO L225 Difference]: With dead ends: 5723 [2021-06-05 23:12:50,491 INFO L226 Difference]: Without dead ends: 5623 [2021-06-05 23:12:50,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 731.0ms TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:12:50,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5623 states. [2021-06-05 23:12:50,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5623 to 3775. [2021-06-05 23:12:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3775 states, 3774 states have (on average 2.452835188129306) internal successors, (9257), 3774 states have internal predecessors, (9257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3775 states to 3775 states and 9257 transitions. [2021-06-05 23:12:50,531 INFO L78 Accepts]: Start accepts. Automaton has 3775 states and 9257 transitions. Word has length 53 [2021-06-05 23:12:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:50,531 INFO L482 AbstractCegarLoop]: Abstraction has 3775 states and 9257 transitions. [2021-06-05 23:12:50,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3775 states and 9257 transitions. [2021-06-05 23:12:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:50,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:50,534 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:50,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 23:12:50,736 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:50,736 INFO L82 PathProgramCache]: Analyzing trace with hash 188541561, now seen corresponding path program 43 times [2021-06-05 23:12:50,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:50,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907760222] [2021-06-05 23:12:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:51,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:51,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907760222] [2021-06-05 23:12:51,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907760222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:51,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739799655] [2021-06-05 23:12:51,017 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:51,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:12:51,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:51,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:51,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:51,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:51,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:12:51,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:51,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:51,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:51,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:12:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:51,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739799655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:51,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:51,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2021-06-05 23:12:51,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940572444] [2021-06-05 23:12:51,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:12:51,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:12:51,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:12:51,509 INFO L87 Difference]: Start difference. First operand 3775 states and 9257 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:52,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:52,296 INFO L93 Difference]: Finished difference Result 6759 states and 16692 transitions. [2021-06-05 23:12:52,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:12:52,297 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:12:52,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:52,302 INFO L225 Difference]: With dead ends: 6759 [2021-06-05 23:12:52,302 INFO L226 Difference]: Without dead ends: 6695 [2021-06-05 23:12:52,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 854.6ms TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:12:52,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6695 states. [2021-06-05 23:12:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6695 to 3759. [2021-06-05 23:12:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 2.452634379989356) internal successors, (9217), 3758 states have internal predecessors, (9217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:52,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 9217 transitions. [2021-06-05 23:12:52,350 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 9217 transitions. Word has length 53 [2021-06-05 23:12:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:52,350 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 9217 transitions. [2021-06-05 23:12:52,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 9217 transitions. [2021-06-05 23:12:52,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:52,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:52,354 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:52,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 23:12:52,568 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:52,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:52,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1784861305, now seen corresponding path program 44 times [2021-06-05 23:12:52,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:52,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75053268] [2021-06-05 23:12:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:12:52,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:52,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75053268] [2021-06-05 23:12:52,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75053268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:52,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855729648] [2021-06-05 23:12:52,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:52,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:12:52,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:52,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:12:52,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:53,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:53,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:53,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:12:53,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:53,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:53,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:53,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:12:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:53,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855729648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:53,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:53,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 21 [2021-06-05 23:12:53,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832706323] [2021-06-05 23:12:53,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:12:53,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:53,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:12:53,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:12:53,206 INFO L87 Difference]: Start difference. First operand 3759 states and 9217 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:54,500 INFO L93 Difference]: Finished difference Result 7151 states and 17562 transitions. [2021-06-05 23:12:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:12:54,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:12:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:54,506 INFO L225 Difference]: With dead ends: 7151 [2021-06-05 23:12:54,507 INFO L226 Difference]: Without dead ends: 6711 [2021-06-05 23:12:54,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1022.5ms TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:12:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6711 states. [2021-06-05 23:12:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6711 to 4175. [2021-06-05 23:12:54,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4175 states, 4174 states have (on average 2.4535218016291327) internal successors, (10241), 4174 states have internal predecessors, (10241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4175 states to 4175 states and 10241 transitions. [2021-06-05 23:12:54,550 INFO L78 Accepts]: Start accepts. Automaton has 4175 states and 10241 transitions. Word has length 53 [2021-06-05 23:12:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:54,551 INFO L482 AbstractCegarLoop]: Abstraction has 4175 states and 10241 transitions. [2021-06-05 23:12:54,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand 4175 states and 10241 transitions. [2021-06-05 23:12:54,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:54,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:54,555 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:54,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:54,757 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:54,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash 2081184377, now seen corresponding path program 45 times [2021-06-05 23:12:54,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:54,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716462661] [2021-06-05 23:12:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 83 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:12:54,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:54,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716462661] [2021-06-05 23:12:54,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716462661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:54,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632334945] [2021-06-05 23:12:54,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:55,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:12:55,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:55,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:12:55,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:55,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:55,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:55,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:12:55,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:55,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:55,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:55,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:12:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 10 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:55,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632334945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:55,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:55,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 20 [2021-06-05 23:12:55,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871196100] [2021-06-05 23:12:55,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:12:55,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:55,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:12:55,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:12:55,416 INFO L87 Difference]: Start difference. First operand 4175 states and 10241 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:56,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:56,192 INFO L93 Difference]: Finished difference Result 6651 states and 16395 transitions. [2021-06-05 23:12:56,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:12:56,192 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:12:56,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:56,198 INFO L225 Difference]: With dead ends: 6651 [2021-06-05 23:12:56,198 INFO L226 Difference]: Without dead ends: 6575 [2021-06-05 23:12:56,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 722.8ms TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:12:56,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6575 states. [2021-06-05 23:12:56,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6575 to 4335. [2021-06-05 23:12:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4335 states, 4334 states have (on average 2.45523765574527) internal successors, (10641), 4334 states have internal predecessors, (10641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4335 states to 4335 states and 10641 transitions. [2021-06-05 23:12:56,243 INFO L78 Accepts]: Start accepts. Automaton has 4335 states and 10641 transitions. Word has length 53 [2021-06-05 23:12:56,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:56,243 INFO L482 AbstractCegarLoop]: Abstraction has 4335 states and 10641 transitions. [2021-06-05 23:12:56,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 4335 states and 10641 transitions. [2021-06-05 23:12:56,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:56,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:56,247 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:56,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:56,448 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:56,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1415216007, now seen corresponding path program 46 times [2021-06-05 23:12:56,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:56,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446456293] [2021-06-05 23:12:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:56,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:56,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446456293] [2021-06-05 23:12:56,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446456293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:56,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239843340] [2021-06-05 23:12:56,705 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:56,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:12:56,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:56,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:12:56,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:57,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:57,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:57,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:12:57,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:57,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:57,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:57,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:12:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:57,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239843340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:57,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:57,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 21 [2021-06-05 23:12:57,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088689326] [2021-06-05 23:12:57,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:12:57,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:57,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:12:57,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:12:57,174 INFO L87 Difference]: Start difference. First operand 4335 states and 10641 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:57,972 INFO L93 Difference]: Finished difference Result 8163 states and 20066 transitions. [2021-06-05 23:12:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:12:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:12:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:57,980 INFO L225 Difference]: With dead ends: 8163 [2021-06-05 23:12:57,980 INFO L226 Difference]: Without dead ends: 7863 [2021-06-05 23:12:57,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 851.4ms TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:12:57,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7863 states. [2021-06-05 23:12:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7863 to 4847. [2021-06-05 23:12:58,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4847 states, 4846 states have (on average 2.4599669830788278) internal successors, (11921), 4846 states have internal predecessors, (11921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4847 states to 4847 states and 11921 transitions. [2021-06-05 23:12:58,033 INFO L78 Accepts]: Start accepts. Automaton has 4847 states and 11921 transitions. Word has length 53 [2021-06-05 23:12:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:58,033 INFO L482 AbstractCegarLoop]: Abstraction has 4847 states and 11921 transitions. [2021-06-05 23:12:58,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 4847 states and 11921 transitions. [2021-06-05 23:12:58,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:58,037 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:58,037 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:58,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 23:12:58,253 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:58,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1662317447, now seen corresponding path program 47 times [2021-06-05 23:12:58,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:58,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468517582] [2021-06-05 23:12:58,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:58,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:58,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468517582] [2021-06-05 23:12:58,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468517582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:58,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947479724] [2021-06-05 23:12:58,567 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:58,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:12:58,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:58,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:12:58,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:58,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:58,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:58,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:58,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:12:58,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:58,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:58,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:12:58,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:12:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:12:59,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947479724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:59,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:59,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-05 23:12:59,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256538368] [2021-06-05 23:12:59,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:12:59,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:59,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:12:59,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:12:59,004 INFO L87 Difference]: Start difference. First operand 4847 states and 11921 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:59,726 INFO L93 Difference]: Finished difference Result 8775 states and 21889 transitions. [2021-06-05 23:12:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:12:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:12:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:59,734 INFO L225 Difference]: With dead ends: 8775 [2021-06-05 23:12:59,734 INFO L226 Difference]: Without dead ends: 8591 [2021-06-05 23:12:59,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 852.6ms TimeCoverageRelationStatistics Valid=213, Invalid=1509, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:12:59,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8591 states. [2021-06-05 23:12:59,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8591 to 4927. [2021-06-05 23:12:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4927 states, 4926 states have (on average 2.460617133576939) internal successors, (12121), 4926 states have internal predecessors, (12121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4927 states to 4927 states and 12121 transitions. [2021-06-05 23:12:59,790 INFO L78 Accepts]: Start accepts. Automaton has 4927 states and 12121 transitions. Word has length 53 [2021-06-05 23:12:59,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:59,790 INFO L482 AbstractCegarLoop]: Abstraction has 4927 states and 12121 transitions. [2021-06-05 23:12:59,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:12:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4927 states and 12121 transitions. [2021-06-05 23:12:59,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:12:59,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:59,794 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:59,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:59,995 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:59,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:59,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1503407737, now seen corresponding path program 48 times [2021-06-05 23:12:59,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:59,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532825432] [2021-06-05 23:12:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:00,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:00,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532825432] [2021-06-05 23:13:00,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532825432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:00,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145918128] [2021-06-05 23:13:00,221 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:00,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:13:00,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:00,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 23:13:00,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:00,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:00,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:00,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:00,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:00,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:00,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:00,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 43 [2021-06-05 23:13:00,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:00,752 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:13:00,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:00,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:123, output treesize:7 [2021-06-05 23:13:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:00,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145918128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:00,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:00,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 20 [2021-06-05 23:13:00,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386038278] [2021-06-05 23:13:00,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:13:00,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:00,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:13:00,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:13:00,766 INFO L87 Difference]: Start difference. First operand 4927 states and 12121 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:02,279 INFO L93 Difference]: Finished difference Result 8247 states and 20264 transitions. [2021-06-05 23:13:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:13:02,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:13:02,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:02,286 INFO L225 Difference]: With dead ends: 8247 [2021-06-05 23:13:02,286 INFO L226 Difference]: Without dead ends: 7975 [2021-06-05 23:13:02,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 972.0ms TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:13:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7975 states. [2021-06-05 23:13:02,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7975 to 5487. [2021-06-05 23:13:02,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5486 states have (on average 2.461720743711265) internal successors, (13505), 5486 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:02,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 13505 transitions. [2021-06-05 23:13:02,352 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 13505 transitions. Word has length 53 [2021-06-05 23:13:02,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:02,352 INFO L482 AbstractCegarLoop]: Abstraction has 5487 states and 13505 transitions. [2021-06-05 23:13:02,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:02,352 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 13505 transitions. [2021-06-05 23:13:02,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:13:02,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:02,356 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:02,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 23:13:02,560 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:02,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:02,560 INFO L82 PathProgramCache]: Analyzing trace with hash -503319943, now seen corresponding path program 49 times [2021-06-05 23:13:02,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:02,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899822563] [2021-06-05 23:13:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:02,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:02,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899822563] [2021-06-05 23:13:02,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899822563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:02,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862566813] [2021-06-05 23:13:02,792 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:02,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:13:02,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:03,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:03,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:03,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:13:03,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:03,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:03,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:03,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:13:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:03,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862566813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:03,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:03,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 21 [2021-06-05 23:13:03,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929246805] [2021-06-05 23:13:03,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:13:03,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:03,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:13:03,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:13:03,188 INFO L87 Difference]: Start difference. First operand 5487 states and 13505 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:03,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:03,822 INFO L93 Difference]: Finished difference Result 10191 states and 25270 transitions. [2021-06-05 23:13:03,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:13:03,823 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:13:03,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:03,830 INFO L225 Difference]: With dead ends: 10191 [2021-06-05 23:13:03,831 INFO L226 Difference]: Without dead ends: 10103 [2021-06-05 23:13:03,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 766.4ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:13:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10103 states. [2021-06-05 23:13:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10103 to 5455. [2021-06-05 23:13:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5455 states, 5454 states have (on average 2.4614961496149617) internal successors, (13425), 5454 states have internal predecessors, (13425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5455 states to 5455 states and 13425 transitions. [2021-06-05 23:13:03,899 INFO L78 Accepts]: Start accepts. Automaton has 5455 states and 13425 transitions. Word has length 53 [2021-06-05 23:13:03,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:03,899 INFO L482 AbstractCegarLoop]: Abstraction has 5455 states and 13425 transitions. [2021-06-05 23:13:03,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:03,899 INFO L276 IsEmpty]: Start isEmpty. Operand 5455 states and 13425 transitions. [2021-06-05 23:13:03,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:13:03,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:03,902 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:04,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 23:13:04,103 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:04,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1256306297, now seen corresponding path program 50 times [2021-06-05 23:13:04,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:04,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854047933] [2021-06-05 23:13:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:04,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:04,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854047933] [2021-06-05 23:13:04,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854047933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:04,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204865707] [2021-06-05 23:13:04,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:04,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:04,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:04,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:13:04,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:04,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:13:04,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:04,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:04,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:04,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:13:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:04,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204865707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:04,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:04,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-05 23:13:04,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995482787] [2021-06-05 23:13:04,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:13:04,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:04,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:13:04,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:13:04,803 INFO L87 Difference]: Start difference. First operand 5455 states and 13425 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:05,597 INFO L93 Difference]: Finished difference Result 9127 states and 22633 transitions. [2021-06-05 23:13:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:13:05,598 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:13:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:05,606 INFO L225 Difference]: With dead ends: 9127 [2021-06-05 23:13:05,606 INFO L226 Difference]: Without dead ends: 9039 [2021-06-05 23:13:05,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 795.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:13:05,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2021-06-05 23:13:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 5455. [2021-06-05 23:13:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5455 states, 5454 states have (on average 2.4614961496149617) internal successors, (13425), 5454 states have internal predecessors, (13425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:05,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5455 states to 5455 states and 13425 transitions. [2021-06-05 23:13:05,669 INFO L78 Accepts]: Start accepts. Automaton has 5455 states and 13425 transitions. Word has length 53 [2021-06-05 23:13:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:05,669 INFO L482 AbstractCegarLoop]: Abstraction has 5455 states and 13425 transitions. [2021-06-05 23:13:05,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 5455 states and 13425 transitions. [2021-06-05 23:13:05,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:13:05,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:05,674 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:05,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 23:13:05,888 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:05,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:05,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1244538759, now seen corresponding path program 51 times [2021-06-05 23:13:05,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:05,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703573613] [2021-06-05 23:13:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:06,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:06,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703573613] [2021-06-05 23:13:06,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703573613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:06,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376193132] [2021-06-05 23:13:06,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:06,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:13:06,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:06,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:13:06,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:06,471 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-06-05 23:13:06,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:13:06,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:06,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:06,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:06,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:109, output treesize:7 [2021-06-05 23:13:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:06,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376193132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:06,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:06,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 21 [2021-06-05 23:13:06,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993425428] [2021-06-05 23:13:06,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:13:06,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:06,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:13:06,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:13:06,488 INFO L87 Difference]: Start difference. First operand 5455 states and 13425 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:07,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:07,031 INFO L93 Difference]: Finished difference Result 7667 states and 18917 transitions. [2021-06-05 23:13:07,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:13:07,031 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:13:07,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:07,038 INFO L225 Difference]: With dead ends: 7667 [2021-06-05 23:13:07,039 INFO L226 Difference]: Without dead ends: 7631 [2021-06-05 23:13:07,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 689.9ms TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:13:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7631 states. [2021-06-05 23:13:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7631 to 5487. [2021-06-05 23:13:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5486 states have (on average 2.461720743711265) internal successors, (13505), 5486 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:07,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 13505 transitions. [2021-06-05 23:13:07,101 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 13505 transitions. Word has length 53 [2021-06-05 23:13:07,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:07,102 INFO L482 AbstractCegarLoop]: Abstraction has 5487 states and 13505 transitions. [2021-06-05 23:13:07,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:07,102 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 13505 transitions. [2021-06-05 23:13:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 23:13:07,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:07,106 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:07,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 23:13:07,328 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:07,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:07,328 INFO L82 PathProgramCache]: Analyzing trace with hash 75123451, now seen corresponding path program 52 times [2021-06-05 23:13:07,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:07,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061790126] [2021-06-05 23:13:07,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 49 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:07,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:07,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061790126] [2021-06-05 23:13:07,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061790126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:07,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293448853] [2021-06-05 23:13:07,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:07,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:13:07,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:07,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:13:07,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 49 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:07,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293448853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:07,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:07,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 23:13:07,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864478447] [2021-06-05 23:13:07,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:13:07,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:07,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:13:07,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:13:07,505 INFO L87 Difference]: Start difference. First operand 5487 states and 13505 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:07,547 INFO L93 Difference]: Finished difference Result 6987 states and 17110 transitions. [2021-06-05 23:13:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:13:07,548 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 23:13:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:07,553 INFO L225 Difference]: With dead ends: 6987 [2021-06-05 23:13:07,553 INFO L226 Difference]: Without dead ends: 6979 [2021-06-05 23:13:07,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:13:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6979 states. [2021-06-05 23:13:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6979 to 5711. [2021-06-05 23:13:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5711 states, 5710 states have (on average 2.4660245183887914) internal successors, (14081), 5710 states have internal predecessors, (14081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5711 states to 5711 states and 14081 transitions. [2021-06-05 23:13:07,608 INFO L78 Accepts]: Start accepts. Automaton has 5711 states and 14081 transitions. Word has length 55 [2021-06-05 23:13:07,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:07,608 INFO L482 AbstractCegarLoop]: Abstraction has 5711 states and 14081 transitions. [2021-06-05 23:13:07,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 5711 states and 14081 transitions. [2021-06-05 23:13:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 23:13:07,612 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:07,612 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:07,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:07,813 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:07,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1670278101, now seen corresponding path program 53 times [2021-06-05 23:13:07,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:07,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775811087] [2021-06-05 23:13:07,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:08,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:08,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775811087] [2021-06-05 23:13:08,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775811087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:08,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897932644] [2021-06-05 23:13:08,082 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:08,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:13:08,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:08,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:13:08,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:08,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:08,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:08,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:08,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 23:13:08,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:08,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:08,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:08,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:13:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:08,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897932644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:08,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:08,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 22 [2021-06-05 23:13:08,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224352138] [2021-06-05 23:13:08,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:13:08,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:08,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:13:08,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:13:08,556 INFO L87 Difference]: Start difference. First operand 5711 states and 14081 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:09,929 INFO L93 Difference]: Finished difference Result 9803 states and 24338 transitions. [2021-06-05 23:13:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:13:09,929 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 23:13:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:09,937 INFO L225 Difference]: With dead ends: 9803 [2021-06-05 23:13:09,938 INFO L226 Difference]: Without dead ends: 9719 [2021-06-05 23:13:09,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1294.4ms TimeCoverageRelationStatistics Valid=311, Invalid=2239, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:13:09,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9719 states. [2021-06-05 23:13:10,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9719 to 5615. [2021-06-05 23:13:10,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5615 states, 5614 states have (on average 2.4654435340220875) internal successors, (13841), 5614 states have internal predecessors, (13841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:10,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5615 states to 5615 states and 13841 transitions. [2021-06-05 23:13:10,020 INFO L78 Accepts]: Start accepts. Automaton has 5615 states and 13841 transitions. Word has length 57 [2021-06-05 23:13:10,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:10,020 INFO L482 AbstractCegarLoop]: Abstraction has 5615 states and 13841 transitions. [2021-06-05 23:13:10,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:10,021 INFO L276 IsEmpty]: Start isEmpty. Operand 5615 states and 13841 transitions. [2021-06-05 23:13:10,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:10,025 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:10,025 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:10,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 23:13:10,226 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:10,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:10,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1390569303, now seen corresponding path program 54 times [2021-06-05 23:13:10,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:10,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265850528] [2021-06-05 23:13:10,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:10,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:10,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265850528] [2021-06-05 23:13:10,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265850528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:10,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378417844] [2021-06-05 23:13:10,457 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:10,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:13:10,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:10,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:13:10,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:11,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:11,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:11,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:11,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:11,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:11,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:11,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:11,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:13:11,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:11,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:11,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:11,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:11,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378417844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:11,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:11,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 23:13:11,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561965453] [2021-06-05 23:13:11,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:13:11,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:11,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:13:11,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:13:11,085 INFO L87 Difference]: Start difference. First operand 5615 states and 13841 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:12,149 INFO L93 Difference]: Finished difference Result 10807 states and 26817 transitions. [2021-06-05 23:13:12,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:13:12,149 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:12,159 INFO L225 Difference]: With dead ends: 10807 [2021-06-05 23:13:12,159 INFO L226 Difference]: Without dead ends: 10767 [2021-06-05 23:13:12,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1042.5ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:13:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10767 states. [2021-06-05 23:13:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10767 to 5679. [2021-06-05 23:13:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5679 states, 5678 states have (on average 2.4658330398027473) internal successors, (14001), 5678 states have internal predecessors, (14001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5679 states to 5679 states and 14001 transitions. [2021-06-05 23:13:12,242 INFO L78 Accepts]: Start accepts. Automaton has 5679 states and 14001 transitions. Word has length 59 [2021-06-05 23:13:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:12,242 INFO L482 AbstractCegarLoop]: Abstraction has 5679 states and 14001 transitions. [2021-06-05 23:13:12,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 5679 states and 14001 transitions. [2021-06-05 23:13:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:12,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:12,247 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:12,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:12,447 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1034811049, now seen corresponding path program 55 times [2021-06-05 23:13:12,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:12,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163571243] [2021-06-05 23:13:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:12,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:12,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163571243] [2021-06-05 23:13:12,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163571243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:12,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738858786] [2021-06-05 23:13:12,683 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:12,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:13:12,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:13,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:13,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:13,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:13,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:13,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:13,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:13,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:13:13,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:13,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:13,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:13,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:13,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738858786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:13,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:13,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 23:13:13,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925825975] [2021-06-05 23:13:13,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:13:13,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:13,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:13:13,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:13:13,290 INFO L87 Difference]: Start difference. First operand 5679 states and 14001 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:14,391 INFO L93 Difference]: Finished difference Result 11111 states and 27625 transitions. [2021-06-05 23:13:14,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:13:14,391 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:14,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:14,401 INFO L225 Difference]: With dead ends: 11111 [2021-06-05 23:13:14,401 INFO L226 Difference]: Without dead ends: 11023 [2021-06-05 23:13:14,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1040.4ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:13:14,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11023 states. [2021-06-05 23:13:14,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11023 to 5775. [2021-06-05 23:13:14,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5775 states, 5774 states have (on average 2.463630065812262) internal successors, (14225), 5774 states have internal predecessors, (14225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5775 states to 5775 states and 14225 transitions. [2021-06-05 23:13:14,473 INFO L78 Accepts]: Start accepts. Automaton has 5775 states and 14225 transitions. Word has length 59 [2021-06-05 23:13:14,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:14,474 INFO L482 AbstractCegarLoop]: Abstraction has 5775 states and 14225 transitions. [2021-06-05 23:13:14,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:14,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5775 states and 14225 transitions. [2021-06-05 23:13:14,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:14,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:14,478 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:14,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 23:13:14,679 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:14,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:14,679 INFO L82 PathProgramCache]: Analyzing trace with hash 823145303, now seen corresponding path program 56 times [2021-06-05 23:13:14,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:14,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653105053] [2021-06-05 23:13:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:13:14,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:14,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653105053] [2021-06-05 23:13:14,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653105053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:14,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948326202] [2021-06-05 23:13:14,923 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:14,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:14,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:14,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:13:14,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:15,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:15,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:15,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:15,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:15,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:15,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:15,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:13:15,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:15,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:15,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:15,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:15,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948326202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:15,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:15,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 23:13:15,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403840570] [2021-06-05 23:13:15,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:13:15,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:15,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:13:15,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:13:15,545 INFO L87 Difference]: Start difference. First operand 5775 states and 14225 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:16,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:16,620 INFO L93 Difference]: Finished difference Result 9879 states and 24481 transitions. [2021-06-05 23:13:16,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:13:16,620 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:16,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:16,629 INFO L225 Difference]: With dead ends: 9879 [2021-06-05 23:13:16,629 INFO L226 Difference]: Without dead ends: 9839 [2021-06-05 23:13:16,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1036.5ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:13:16,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9839 states. [2021-06-05 23:13:16,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9839 to 5807. [2021-06-05 23:13:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5807 states, 5806 states have (on average 2.4638305201515673) internal successors, (14305), 5806 states have internal predecessors, (14305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5807 states to 5807 states and 14305 transitions. [2021-06-05 23:13:16,697 INFO L78 Accepts]: Start accepts. Automaton has 5807 states and 14305 transitions. Word has length 59 [2021-06-05 23:13:16,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:16,697 INFO L482 AbstractCegarLoop]: Abstraction has 5807 states and 14305 transitions. [2021-06-05 23:13:16,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:16,697 INFO L276 IsEmpty]: Start isEmpty. Operand 5807 states and 14305 transitions. [2021-06-05 23:13:16,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:16,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:16,702 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:16,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:16,902 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:16,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:16,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1909470551, now seen corresponding path program 57 times [2021-06-05 23:13:16,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:16,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231891591] [2021-06-05 23:13:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:17,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:17,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231891591] [2021-06-05 23:13:17,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231891591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:17,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101667358] [2021-06-05 23:13:17,132 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:17,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:13:17,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:17,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:13:17,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:17,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:17,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:17,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:17,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:17,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:17,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:17,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:13:17,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:17,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:17,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:17,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:17,794 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:17,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101667358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:17,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:17,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 27 [2021-06-05 23:13:17,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022409566] [2021-06-05 23:13:17,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:13:17,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:17,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:13:17,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:13:17,797 INFO L87 Difference]: Start difference. First operand 5807 states and 14305 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:19,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:19,418 INFO L93 Difference]: Finished difference Result 9031 states and 22247 transitions. [2021-06-05 23:13:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:13:19,418 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:19,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:19,426 INFO L225 Difference]: With dead ends: 9031 [2021-06-05 23:13:19,426 INFO L226 Difference]: Without dead ends: 8623 [2021-06-05 23:13:19,427 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1243.5ms TimeCoverageRelationStatistics Valid=301, Invalid=2351, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:13:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8623 states. [2021-06-05 23:13:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8623 to 6095. [2021-06-05 23:13:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6095 states, 6094 states have (on average 2.4616015753199867) internal successors, (15001), 6094 states have internal predecessors, (15001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:19,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6095 states to 6095 states and 15001 transitions. [2021-06-05 23:13:19,493 INFO L78 Accepts]: Start accepts. Automaton has 6095 states and 15001 transitions. Word has length 59 [2021-06-05 23:13:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:19,493 INFO L482 AbstractCegarLoop]: Abstraction has 6095 states and 15001 transitions. [2021-06-05 23:13:19,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:19,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6095 states and 15001 transitions. [2021-06-05 23:13:19,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:19,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:19,498 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:19,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 23:13:19,699 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:19,699 INFO L82 PathProgramCache]: Analyzing trace with hash 832156503, now seen corresponding path program 58 times [2021-06-05 23:13:19,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:19,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131419122] [2021-06-05 23:13:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:20,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:20,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131419122] [2021-06-05 23:13:20,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131419122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:20,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633380445] [2021-06-05 23:13:20,020 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:20,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:13:20,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:20,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:13:20,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:20,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:20,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:20,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:20,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:20,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:20,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:13:20,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:20,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:20,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:20,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:20,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633380445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:20,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:20,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 23:13:20,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713951376] [2021-06-05 23:13:20,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:13:20,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:20,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:13:20,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:13:20,695 INFO L87 Difference]: Start difference. First operand 6095 states and 15001 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:21,824 INFO L93 Difference]: Finished difference Result 12839 states and 32095 transitions. [2021-06-05 23:13:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:13:21,825 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:21,837 INFO L225 Difference]: With dead ends: 12839 [2021-06-05 23:13:21,837 INFO L226 Difference]: Without dead ends: 12655 [2021-06-05 23:13:21,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1160.9ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:13:21,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12655 states. [2021-06-05 23:13:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12655 to 5359. [2021-06-05 23:13:21,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 5358 states have (on average 2.4667786487495333) internal successors, (13217), 5358 states have internal predecessors, (13217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 13217 transitions. [2021-06-05 23:13:21,929 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 13217 transitions. Word has length 59 [2021-06-05 23:13:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:21,929 INFO L482 AbstractCegarLoop]: Abstraction has 5359 states and 13217 transitions. [2021-06-05 23:13:21,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 29 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 13217 transitions. [2021-06-05 23:13:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:21,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:21,933 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:22,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:22,134 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:22,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:22,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1604854441, now seen corresponding path program 59 times [2021-06-05 23:13:22,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:22,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737355840] [2021-06-05 23:13:22,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:22,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:22,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737355840] [2021-06-05 23:13:22,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737355840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:22,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939428306] [2021-06-05 23:13:22,373 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:22,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:13:22,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:22,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 23:13:22,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:23,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:23,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:23,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:23,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:23,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:23,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:23,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:23,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:23,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 38 [2021-06-05 23:13:23,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:23,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:23,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:23,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:98, output treesize:3 [2021-06-05 23:13:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:23,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939428306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:23,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:23,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 23:13:23,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397380992] [2021-06-05 23:13:23,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:13:23,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:23,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:13:23,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:13:23,107 INFO L87 Difference]: Start difference. First operand 5359 states and 13217 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:25,662 INFO L93 Difference]: Finished difference Result 12591 states and 31245 transitions. [2021-06-05 23:13:25,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:13:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:25,673 INFO L225 Difference]: With dead ends: 12591 [2021-06-05 23:13:25,674 INFO L226 Difference]: Without dead ends: 12143 [2021-06-05 23:13:25,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1742.8ms TimeCoverageRelationStatistics Valid=292, Invalid=3014, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:13:25,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12143 states. [2021-06-05 23:13:25,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12143 to 6559. [2021-06-05 23:13:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6559 states, 6558 states have (on average 2.466758157974992) internal successors, (16177), 6558 states have internal predecessors, (16177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6559 states to 6559 states and 16177 transitions. [2021-06-05 23:13:25,761 INFO L78 Accepts]: Start accepts. Automaton has 6559 states and 16177 transitions. Word has length 59 [2021-06-05 23:13:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:25,761 INFO L482 AbstractCegarLoop]: Abstraction has 6559 states and 16177 transitions. [2021-06-05 23:13:25,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 6559 states and 16177 transitions. [2021-06-05 23:13:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:25,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:25,765 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:25,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 23:13:25,969 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:25,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1977286825, now seen corresponding path program 60 times [2021-06-05 23:13:25,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:25,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457532466] [2021-06-05 23:13:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:26,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:26,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457532466] [2021-06-05 23:13:26,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457532466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:26,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868566760] [2021-06-05 23:13:26,264 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:26,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:13:26,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:26,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 23:13:26,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:27,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:27,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:27,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:27,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:27,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:27,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:27,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:27,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 48 [2021-06-05 23:13:27,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:27,148 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:13:27,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:27,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:142, output treesize:7 [2021-06-05 23:13:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:27,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868566760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:27,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:27,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 23:13:27,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586745775] [2021-06-05 23:13:27,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:13:27,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:27,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:13:27,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:13:27,160 INFO L87 Difference]: Start difference. First operand 6559 states and 16177 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:29,419 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-05 23:13:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:30,683 INFO L93 Difference]: Finished difference Result 12419 states and 30851 transitions. [2021-06-05 23:13:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:13:30,683 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:30,694 INFO L225 Difference]: With dead ends: 12419 [2021-06-05 23:13:30,694 INFO L226 Difference]: Without dead ends: 11983 [2021-06-05 23:13:30,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1891.0ms TimeCoverageRelationStatistics Valid=286, Invalid=2684, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:13:30,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11983 states. [2021-06-05 23:13:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11983 to 6495. [2021-06-05 23:13:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6495 states, 6494 states have (on average 2.4701262704034495) internal successors, (16041), 6494 states have internal predecessors, (16041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:30,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6495 states to 6495 states and 16041 transitions. [2021-06-05 23:13:30,808 INFO L78 Accepts]: Start accepts. Automaton has 6495 states and 16041 transitions. Word has length 59 [2021-06-05 23:13:30,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:30,808 INFO L482 AbstractCegarLoop]: Abstraction has 6495 states and 16041 transitions. [2021-06-05 23:13:30,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand 6495 states and 16041 transitions. [2021-06-05 23:13:30,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:30,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:30,813 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:31,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:31,014 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:31,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:31,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1613808297, now seen corresponding path program 61 times [2021-06-05 23:13:31,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:31,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174071580] [2021-06-05 23:13:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:31,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:31,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174071580] [2021-06-05 23:13:31,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174071580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:31,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819533921] [2021-06-05 23:13:31,363 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:31,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:13:31,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:31,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:31,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:31,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:31,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:31,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:31,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:31,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:31,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:13:31,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:31,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:31,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:31,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:31,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819533921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:31,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:31,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 23:13:31,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373396270] [2021-06-05 23:13:31,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:13:31,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:31,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:13:31,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:13:31,975 INFO L87 Difference]: Start difference. First operand 6495 states and 16041 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:33,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:33,011 INFO L93 Difference]: Finished difference Result 10055 states and 24851 transitions. [2021-06-05 23:13:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:13:33,011 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:33,020 INFO L225 Difference]: With dead ends: 10055 [2021-06-05 23:13:33,020 INFO L226 Difference]: Without dead ends: 9695 [2021-06-05 23:13:33,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1313.5ms TimeCoverageRelationStatistics Valid=302, Invalid=2350, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:13:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9695 states. [2021-06-05 23:13:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9695 to 7343. [2021-06-05 23:13:33,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7343 states, 7342 states have (on average 2.4648597112503405) internal successors, (18097), 7342 states have internal predecessors, (18097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7343 states to 7343 states and 18097 transitions. [2021-06-05 23:13:33,119 INFO L78 Accepts]: Start accepts. Automaton has 7343 states and 18097 transitions. Word has length 59 [2021-06-05 23:13:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:33,119 INFO L482 AbstractCegarLoop]: Abstraction has 7343 states and 18097 transitions. [2021-06-05 23:13:33,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 7343 states and 18097 transitions. [2021-06-05 23:13:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:33,124 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:33,124 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:33,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 23:13:33,325 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:33,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1172638039, now seen corresponding path program 62 times [2021-06-05 23:13:33,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:33,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292977258] [2021-06-05 23:13:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 114 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:13:33,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:33,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292977258] [2021-06-05 23:13:33,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292977258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:33,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959493615] [2021-06-05 23:13:33,533 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:33,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:33,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:33,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:13:33,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:34,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:34,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:34,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:34,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:34,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:34,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:34,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:34,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:13:34,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:34,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:34,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:34,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:34,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959493615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:34,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:34,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 27 [2021-06-05 23:13:34,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767458303] [2021-06-05 23:13:34,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:13:34,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:34,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:13:34,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:13:34,137 INFO L87 Difference]: Start difference. First operand 7343 states and 18097 transitions. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:35,777 INFO L93 Difference]: Finished difference Result 11835 states and 29279 transitions. [2021-06-05 23:13:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:13:35,778 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:35,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:35,786 INFO L225 Difference]: With dead ends: 11835 [2021-06-05 23:13:35,786 INFO L226 Difference]: Without dead ends: 11391 [2021-06-05 23:13:35,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1280.4ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:13:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11391 states. [2021-06-05 23:13:35,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11391 to 6767. [2021-06-05 23:13:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6766 states have (on average 2.4665976943541237) internal successors, (16689), 6766 states have internal predecessors, (16689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 16689 transitions. [2021-06-05 23:13:35,862 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 16689 transitions. Word has length 59 [2021-06-05 23:13:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:35,862 INFO L482 AbstractCegarLoop]: Abstraction has 6767 states and 16689 transitions. [2021-06-05 23:13:35,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 16689 transitions. [2021-06-05 23:13:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:35,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:35,866 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:36,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 23:13:36,068 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:36,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:36,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2049900887, now seen corresponding path program 63 times [2021-06-05 23:13:36,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:36,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226930784] [2021-06-05 23:13:36,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:36,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:36,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226930784] [2021-06-05 23:13:36,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226930784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:36,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574959694] [2021-06-05 23:13:36,366 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:36,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:13:36,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:36,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:13:36,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:36,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:36,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:36,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:36,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:36,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:36,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:36,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:36,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:13:36,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:36,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:36,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:36,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:36,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574959694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:36,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:36,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 23:13:36,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589008844] [2021-06-05 23:13:36,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:13:36,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:36,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:13:36,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:13:36,993 INFO L87 Difference]: Start difference. First operand 6767 states and 16689 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:38,546 INFO L93 Difference]: Finished difference Result 10007 states and 24673 transitions. [2021-06-05 23:13:38,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:13:38,546 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:38,554 INFO L225 Difference]: With dead ends: 10007 [2021-06-05 23:13:38,554 INFO L226 Difference]: Without dead ends: 9615 [2021-06-05 23:13:38,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1303.5ms TimeCoverageRelationStatistics Valid=287, Invalid=2365, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:13:38,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2021-06-05 23:13:38,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 7087. [2021-06-05 23:13:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7087 states, 7086 states have (on average 2.463590177815411) internal successors, (17457), 7086 states have internal predecessors, (17457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:38,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7087 states to 7087 states and 17457 transitions. [2021-06-05 23:13:38,631 INFO L78 Accepts]: Start accepts. Automaton has 7087 states and 17457 transitions. Word has length 59 [2021-06-05 23:13:38,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:38,631 INFO L482 AbstractCegarLoop]: Abstraction has 7087 states and 17457 transitions. [2021-06-05 23:13:38,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:38,631 INFO L276 IsEmpty]: Start isEmpty. Operand 7087 states and 17457 transitions. [2021-06-05 23:13:38,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:38,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:38,636 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:38,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 23:13:38,836 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:38,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:38,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1464424105, now seen corresponding path program 64 times [2021-06-05 23:13:38,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:38,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860739535] [2021-06-05 23:13:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:39,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:39,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860739535] [2021-06-05 23:13:39,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860739535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:39,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903295460] [2021-06-05 23:13:39,141 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:39,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:13:39,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:39,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:13:39,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:39,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:39,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:39,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:39,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:39,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:39,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:39,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:13:39,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:39,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:39,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:39,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:39,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903295460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:39,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:39,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 23:13:39,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411343505] [2021-06-05 23:13:39,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:13:39,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:39,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:13:39,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:13:39,782 INFO L87 Difference]: Start difference. First operand 7087 states and 17457 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:40,886 INFO L93 Difference]: Finished difference Result 11831 states and 29545 transitions. [2021-06-05 23:13:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:13:40,886 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:40,895 INFO L225 Difference]: With dead ends: 11831 [2021-06-05 23:13:40,895 INFO L226 Difference]: Without dead ends: 11647 [2021-06-05 23:13:40,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1068.7ms TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:13:40,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11647 states. [2021-06-05 23:13:40,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11647 to 7119. [2021-06-05 23:13:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7119 states, 7118 states have (on average 2.4637538634447878) internal successors, (17537), 7118 states have internal predecessors, (17537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:40,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7119 states to 7119 states and 17537 transitions. [2021-06-05 23:13:40,976 INFO L78 Accepts]: Start accepts. Automaton has 7119 states and 17537 transitions. Word has length 59 [2021-06-05 23:13:40,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:40,976 INFO L482 AbstractCegarLoop]: Abstraction has 7119 states and 17537 transitions. [2021-06-05 23:13:40,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand 7119 states and 17537 transitions. [2021-06-05 23:13:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:40,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:40,980 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:41,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:41,185 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:41,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:41,185 INFO L82 PathProgramCache]: Analyzing trace with hash -868342953, now seen corresponding path program 65 times [2021-06-05 23:13:41,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:41,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967463347] [2021-06-05 23:13:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:41,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:41,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967463347] [2021-06-05 23:13:41,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967463347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:41,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446396142] [2021-06-05 23:13:41,465 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:41,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:13:41,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:41,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:13:41,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:42,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:42,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:42,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:42,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:42,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:42,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:42,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:42,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:13:42,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:42,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:42,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:42,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:42,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446396142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:42,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:42,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 23:13:42,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553341146] [2021-06-05 23:13:42,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:13:42,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:42,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:13:42,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:13:42,082 INFO L87 Difference]: Start difference. First operand 7119 states and 17537 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:43,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:43,158 INFO L93 Difference]: Finished difference Result 10663 states and 26371 transitions. [2021-06-05 23:13:43,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:13:43,158 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:43,197 INFO L225 Difference]: With dead ends: 10663 [2021-06-05 23:13:43,197 INFO L226 Difference]: Without dead ends: 10335 [2021-06-05 23:13:43,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1115.7ms TimeCoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:13:43,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10335 states. [2021-06-05 23:13:43,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10335 to 7583. [2021-06-05 23:13:43,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7583 states, 7582 states have (on average 2.4638617778950147) internal successors, (18681), 7582 states have internal predecessors, (18681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:43,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7583 states to 7583 states and 18681 transitions. [2021-06-05 23:13:43,278 INFO L78 Accepts]: Start accepts. Automaton has 7583 states and 18681 transitions. Word has length 59 [2021-06-05 23:13:43,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:43,278 INFO L482 AbstractCegarLoop]: Abstraction has 7583 states and 18681 transitions. [2021-06-05 23:13:43,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:43,278 INFO L276 IsEmpty]: Start isEmpty. Operand 7583 states and 18681 transitions. [2021-06-05 23:13:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:43,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:43,283 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:43,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:43,484 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:43,484 INFO L82 PathProgramCache]: Analyzing trace with hash 264697687, now seen corresponding path program 66 times [2021-06-05 23:13:43,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:43,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409108212] [2021-06-05 23:13:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:43,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:43,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409108212] [2021-06-05 23:13:43,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409108212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:43,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385923249] [2021-06-05 23:13:43,757 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:43,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:13:43,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:43,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:13:43,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:44,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:44,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:44,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:44,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:44,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:44,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:44,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:44,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 48 [2021-06-05 23:13:44,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:44,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:44,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:44,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:137, output treesize:7 [2021-06-05 23:13:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:44,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385923249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:44,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:44,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 23:13:44,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693953857] [2021-06-05 23:13:44,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:13:44,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:44,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:13:44,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:13:44,911 INFO L87 Difference]: Start difference. First operand 7583 states and 18681 transitions. Second operand has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:49,527 INFO L93 Difference]: Finished difference Result 14399 states and 35669 transitions. [2021-06-05 23:13:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:13:49,527 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:49,540 INFO L225 Difference]: With dead ends: 14399 [2021-06-05 23:13:49,540 INFO L226 Difference]: Without dead ends: 13951 [2021-06-05 23:13:49,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 2699.3ms TimeCoverageRelationStatistics Valid=299, Invalid=2893, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:13:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13951 states. [2021-06-05 23:13:49,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13951 to 7711. [2021-06-05 23:13:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7711 states, 7710 states have (on average 2.461348897535668) internal successors, (18977), 7710 states have internal predecessors, (18977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7711 states to 7711 states and 18977 transitions. [2021-06-05 23:13:49,645 INFO L78 Accepts]: Start accepts. Automaton has 7711 states and 18977 transitions. Word has length 59 [2021-06-05 23:13:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:49,645 INFO L482 AbstractCegarLoop]: Abstraction has 7711 states and 18977 transitions. [2021-06-05 23:13:49,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 7711 states and 18977 transitions. [2021-06-05 23:13:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:49,651 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:49,651 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:49,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:49,852 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:49,852 INFO L82 PathProgramCache]: Analyzing trace with hash -87700649, now seen corresponding path program 67 times [2021-06-05 23:13:49,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:49,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448583366] [2021-06-05 23:13:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:50,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:50,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448583366] [2021-06-05 23:13:50,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448583366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:50,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572396841] [2021-06-05 23:13:50,141 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 [2021-06-05 23:13:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:50,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:13:50,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:50,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:50,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:50,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:50,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:50,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:50,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:50,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:50,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:13:50,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:50,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:50,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:50,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:50,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572396841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:50,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:50,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 23:13:50,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192710660] [2021-06-05 23:13:50,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:13:50,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:50,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:13:50,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:13:50,838 INFO L87 Difference]: Start difference. First operand 7711 states and 18977 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:51,746 INFO L93 Difference]: Finished difference Result 12279 states and 30489 transitions. [2021-06-05 23:13:51,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:13:51,746 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:51,757 INFO L225 Difference]: With dead ends: 12279 [2021-06-05 23:13:51,758 INFO L226 Difference]: Without dead ends: 12191 [2021-06-05 23:13:51,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1098.7ms TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:13:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12191 states. [2021-06-05 23:13:51,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12191 to 7743. [2021-06-05 23:13:51,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7743 states, 7742 states have (on average 2.461508654094549) internal successors, (19057), 7742 states have internal predecessors, (19057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7743 states to 7743 states and 19057 transitions. [2021-06-05 23:13:51,850 INFO L78 Accepts]: Start accepts. Automaton has 7743 states and 19057 transitions. Word has length 59 [2021-06-05 23:13:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:51,850 INFO L482 AbstractCegarLoop]: Abstraction has 7743 states and 19057 transitions. [2021-06-05 23:13:51,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand 7743 states and 19057 transitions. [2021-06-05 23:13:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:51,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:51,855 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:52,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 23:13:52,056 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:52,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:52,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1298041513, now seen corresponding path program 68 times [2021-06-05 23:13:52,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:52,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987088672] [2021-06-05 23:13:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:52,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:52,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987088672] [2021-06-05 23:13:52,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987088672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:52,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484052112] [2021-06-05 23:13:52,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:52,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:52,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:52,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:13:52,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:52,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:52,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:52,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:52,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:53,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:53,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:53,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:53,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:13:53,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:53,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:53,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:53,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:53,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484052112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:53,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:53,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 23:13:53,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879559886] [2021-06-05 23:13:53,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:13:53,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:53,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:13:53,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:13:53,051 INFO L87 Difference]: Start difference. First operand 7743 states and 19057 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:54,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:54,015 INFO L93 Difference]: Finished difference Result 10551 states and 26097 transitions. [2021-06-05 23:13:54,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:13:54,016 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:13:54,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:54,025 INFO L225 Difference]: With dead ends: 10551 [2021-06-05 23:13:54,025 INFO L226 Difference]: Without dead ends: 10511 [2021-06-05 23:13:54,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1093.7ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:13:54,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10511 states. [2021-06-05 23:13:54,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10511 to 7759. [2021-06-05 23:13:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7759 states, 7758 states have (on average 2.4615880381541633) internal successors, (19097), 7758 states have internal predecessors, (19097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7759 states to 7759 states and 19097 transitions. [2021-06-05 23:13:54,110 INFO L78 Accepts]: Start accepts. Automaton has 7759 states and 19097 transitions. Word has length 59 [2021-06-05 23:13:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:54,110 INFO L482 AbstractCegarLoop]: Abstraction has 7759 states and 19097 transitions. [2021-06-05 23:13:54,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 7759 states and 19097 transitions. [2021-06-05 23:13:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:13:54,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:54,115 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:54,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:54,316 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:54,316 INFO L82 PathProgramCache]: Analyzing trace with hash -704558249, now seen corresponding path program 69 times [2021-06-05 23:13:54,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:54,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724303357] [2021-06-05 23:13:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:54,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:54,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724303357] [2021-06-05 23:13:54,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724303357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:54,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245179334] [2021-06-05 23:13:54,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:54,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:13:54,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:54,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:13:54,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:55,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:55,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:55,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:55,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:55,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:55,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:55,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:55,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 48 [2021-06-05 23:13:55,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:55,730 INFO L628 ElimStorePlain]: treesize reduction 5, result has 86.5 percent of original size [2021-06-05 23:13:55,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:13:55,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:150, output treesize:7 [2021-06-05 23:13:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:13:55,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245179334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:55,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:55,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 23:13:55,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406679935] [2021-06-05 23:13:55,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:13:55,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:55,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:13:55,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:13:55,744 INFO L87 Difference]: Start difference. First operand 7759 states and 19097 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:13:59,172 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-05 23:14:02,667 WARN L205 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2021-06-05 23:14:04,756 WARN L205 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2021-06-05 23:14:13,785 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 23:14:17,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:17,175 INFO L93 Difference]: Finished difference Result 19539 states and 48285 transitions. [2021-06-05 23:14:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:14:17,176 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:17,195 INFO L225 Difference]: With dead ends: 19539 [2021-06-05 23:14:17,195 INFO L226 Difference]: Without dead ends: 18831 [2021-06-05 23:14:17,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 8877.2ms TimeCoverageRelationStatistics Valid=456, Invalid=4656, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:14:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18831 states. [2021-06-05 23:14:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18831 to 7551. [2021-06-05 23:14:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7551 states, 7550 states have (on average 2.463708609271523) internal successors, (18601), 7550 states have internal predecessors, (18601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:17,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7551 states to 7551 states and 18601 transitions. [2021-06-05 23:14:17,316 INFO L78 Accepts]: Start accepts. Automaton has 7551 states and 18601 transitions. Word has length 59 [2021-06-05 23:14:17,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:17,316 INFO L482 AbstractCegarLoop]: Abstraction has 7551 states and 18601 transitions. [2021-06-05 23:14:17,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:17,316 INFO L276 IsEmpty]: Start isEmpty. Operand 7551 states and 18601 transitions. [2021-06-05 23:14:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:17,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:17,320 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:17,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:17,521 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash 672165207, now seen corresponding path program 70 times [2021-06-05 23:14:17,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:17,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875477687] [2021-06-05 23:14:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:17,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:17,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875477687] [2021-06-05 23:14:17,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875477687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:17,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945520959] [2021-06-05 23:14:17,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:17,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:17,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:17,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:14:17,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:18,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:18,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:18,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:18,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:18,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:18,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:18,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:14:18,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:18,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:18,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:18,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:14:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:18,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945520959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:18,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:18,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 23:14:18,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645136411] [2021-06-05 23:14:18,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:14:18,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:18,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:14:18,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:14:18,448 INFO L87 Difference]: Start difference. First operand 7551 states and 18601 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:20,012 INFO L93 Difference]: Finished difference Result 14343 states and 35633 transitions. [2021-06-05 23:14:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:14:20,012 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:20,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:20,026 INFO L225 Difference]: With dead ends: 14343 [2021-06-05 23:14:20,027 INFO L226 Difference]: Without dead ends: 14255 [2021-06-05 23:14:20,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1267.7ms TimeCoverageRelationStatistics Valid=322, Invalid=2870, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:14:20,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14255 states. [2021-06-05 23:14:20,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14255 to 7743. [2021-06-05 23:14:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7743 states, 7742 states have (on average 2.4604753293722554) internal successors, (19049), 7742 states have internal predecessors, (19049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7743 states to 7743 states and 19049 transitions. [2021-06-05 23:14:20,136 INFO L78 Accepts]: Start accepts. Automaton has 7743 states and 19049 transitions. Word has length 59 [2021-06-05 23:14:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:20,136 INFO L482 AbstractCegarLoop]: Abstraction has 7743 states and 19049 transitions. [2021-06-05 23:14:20,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 7743 states and 19049 transitions. [2021-06-05 23:14:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:20,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:20,141 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:20,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:20,341 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:20,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:20,341 INFO L82 PathProgramCache]: Analyzing trace with hash -538175657, now seen corresponding path program 71 times [2021-06-05 23:14:20,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:20,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372504341] [2021-06-05 23:14:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:20,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:20,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372504341] [2021-06-05 23:14:20,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372504341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:20,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678830679] [2021-06-05 23:14:20,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:20,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:14:20,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:20,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 23:14:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:21,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:21,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:21,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:21,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:21,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:21,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:14:21,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:21,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:21,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:21,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:14:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:21,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678830679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:21,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:21,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 23:14:21,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750704078] [2021-06-05 23:14:21,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:14:21,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:21,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:14:21,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:14:21,363 INFO L87 Difference]: Start difference. First operand 7743 states and 19049 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:23,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:23,024 INFO L93 Difference]: Finished difference Result 13935 states and 34589 transitions. [2021-06-05 23:14:23,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:14:23,024 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:23,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:23,038 INFO L225 Difference]: With dead ends: 13935 [2021-06-05 23:14:23,039 INFO L226 Difference]: Without dead ends: 13439 [2021-06-05 23:14:23,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1329.7ms TimeCoverageRelationStatistics Valid=328, Invalid=2864, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:14:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13439 states. [2021-06-05 23:14:23,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13439 to 8063. [2021-06-05 23:14:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8063 states, 8062 states have (on average 2.4620441577772265) internal successors, (19849), 8062 states have internal predecessors, (19849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8063 states to 8063 states and 19849 transitions. [2021-06-05 23:14:23,144 INFO L78 Accepts]: Start accepts. Automaton has 8063 states and 19849 transitions. Word has length 59 [2021-06-05 23:14:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:23,144 INFO L482 AbstractCegarLoop]: Abstraction has 8063 states and 19849 transitions. [2021-06-05 23:14:23,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 8063 states and 19849 transitions. [2021-06-05 23:14:23,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:23,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:23,149 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:23,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 23:14:23,349 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:23,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:23,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1248989353, now seen corresponding path program 72 times [2021-06-05 23:14:23,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:23,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266147132] [2021-06-05 23:14:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:23,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:23,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266147132] [2021-06-05 23:14:23,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266147132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:23,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714784187] [2021-06-05 23:14:23,677 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:23,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:14:23,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:23,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:14:23,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:24,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:24,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:24,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:24,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:24,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:24,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:14:24,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:24,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:24,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:24,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:14:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:24,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714784187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:24,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:24,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-05 23:14:24,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713406314] [2021-06-05 23:14:24,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:14:24,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:24,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:14:24,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:14:24,382 INFO L87 Difference]: Start difference. First operand 8063 states and 19849 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:25,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:25,989 INFO L93 Difference]: Finished difference Result 12375 states and 30459 transitions. [2021-06-05 23:14:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:14:25,989 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:25,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:26,000 INFO L225 Difference]: With dead ends: 12375 [2021-06-05 23:14:26,000 INFO L226 Difference]: Without dead ends: 11919 [2021-06-05 23:14:26,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1510.3ms TimeCoverageRelationStatistics Valid=297, Invalid=2565, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:14:26,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11919 states. [2021-06-05 23:14:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11919 to 9231. [2021-06-05 23:14:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9231 states, 9230 states have (on average 2.459913326110509) internal successors, (22705), 9230 states have internal predecessors, (22705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9231 states to 9231 states and 22705 transitions. [2021-06-05 23:14:26,103 INFO L78 Accepts]: Start accepts. Automaton has 9231 states and 22705 transitions. Word has length 59 [2021-06-05 23:14:26,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:26,103 INFO L482 AbstractCegarLoop]: Abstraction has 9231 states and 22705 transitions. [2021-06-05 23:14:26,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:26,103 INFO L276 IsEmpty]: Start isEmpty. Operand 9231 states and 22705 transitions. [2021-06-05 23:14:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:26,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:26,108 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:26,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:26,309 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:26,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:26,309 INFO L82 PathProgramCache]: Analyzing trace with hash -468347049, now seen corresponding path program 73 times [2021-06-05 23:14:26,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:26,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372447233] [2021-06-05 23:14:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:26,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:26,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372447233] [2021-06-05 23:14:26,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372447233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:26,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654900151] [2021-06-05 23:14:26,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:26,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:14:26,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:27,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:27,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:27,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:27,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:27,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:27,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:14:27,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:27,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:27,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:27,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:14:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:27,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654900151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:27,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:27,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 23:14:27,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893804920] [2021-06-05 23:14:27,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:14:27,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:27,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:14:27,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:14:27,290 INFO L87 Difference]: Start difference. First operand 9231 states and 22705 transitions. Second operand has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:28,301 INFO L93 Difference]: Finished difference Result 15815 states and 39361 transitions. [2021-06-05 23:14:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:14:28,302 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:28,318 INFO L225 Difference]: With dead ends: 15815 [2021-06-05 23:14:28,318 INFO L226 Difference]: Without dead ends: 15631 [2021-06-05 23:14:28,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1190.3ms TimeCoverageRelationStatistics Valid=273, Invalid=2277, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:14:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15631 states. [2021-06-05 23:14:28,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15631 to 9551. [2021-06-05 23:14:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9551 states, 9550 states have (on average 2.4612565445026178) internal successors, (23505), 9550 states have internal predecessors, (23505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9551 states to 9551 states and 23505 transitions. [2021-06-05 23:14:28,451 INFO L78 Accepts]: Start accepts. Automaton has 9551 states and 23505 transitions. Word has length 59 [2021-06-05 23:14:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:28,452 INFO L482 AbstractCegarLoop]: Abstraction has 9551 states and 23505 transitions. [2021-06-05 23:14:28,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 9551 states and 23505 transitions. [2021-06-05 23:14:28,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:28,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:28,458 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:28,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 23:14:28,658 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:28,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:28,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1678687913, now seen corresponding path program 74 times [2021-06-05 23:14:28,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:28,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926073513] [2021-06-05 23:14:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:28,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:28,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926073513] [2021-06-05 23:14:28,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926073513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:28,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830863552] [2021-06-05 23:14:28,979 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:29,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:29,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:29,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:14:29,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:29,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:29,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:29,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:29,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:29,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:29,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:14:29,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:29,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:29,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:29,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:14:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:29,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830863552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:29,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:29,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 23:14:29,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134742223] [2021-06-05 23:14:29,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:14:29,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:29,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:14:29,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:14:29,606 INFO L87 Difference]: Start difference. First operand 9551 states and 23505 transitions. Second operand has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:30,683 INFO L93 Difference]: Finished difference Result 12711 states and 31401 transitions. [2021-06-05 23:14:30,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:14:30,716 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:30,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:30,727 INFO L225 Difference]: With dead ends: 12711 [2021-06-05 23:14:30,727 INFO L226 Difference]: Without dead ends: 12671 [2021-06-05 23:14:30,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1074.0ms TimeCoverageRelationStatistics Valid=247, Invalid=2009, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:14:30,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12671 states. [2021-06-05 23:14:30,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12671 to 9567. [2021-06-05 23:14:30,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9567 states, 9566 states have (on average 2.461321346435292) internal successors, (23545), 9566 states have internal predecessors, (23545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:30,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9567 states to 9567 states and 23545 transitions. [2021-06-05 23:14:30,837 INFO L78 Accepts]: Start accepts. Automaton has 9567 states and 23545 transitions. Word has length 59 [2021-06-05 23:14:30,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:30,837 INFO L482 AbstractCegarLoop]: Abstraction has 9567 states and 23545 transitions. [2021-06-05 23:14:30,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:30,837 INFO L276 IsEmpty]: Start isEmpty. Operand 9567 states and 23545 transitions. [2021-06-05 23:14:30,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:30,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:30,843 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:31,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:31,043 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:31,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:31,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1191043927, now seen corresponding path program 75 times [2021-06-05 23:14:31,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:31,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977585155] [2021-06-05 23:14:31,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:31,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:31,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977585155] [2021-06-05 23:14:31,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977585155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:31,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191125171] [2021-06-05 23:14:31,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:31,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:14:31,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:31,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:14:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:31,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:31,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:31,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:31,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:31,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:14:31,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:31,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:31,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:31,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:14:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:31,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191125171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:31,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:31,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-06-05 23:14:31,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655311307] [2021-06-05 23:14:31,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:14:31,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:31,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:14:31,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:14:31,977 INFO L87 Difference]: Start difference. First operand 9567 states and 23545 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:33,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:33,430 INFO L93 Difference]: Finished difference Result 15167 states and 37549 transitions. [2021-06-05 23:14:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:14:33,431 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:33,446 INFO L225 Difference]: With dead ends: 15167 [2021-06-05 23:14:33,446 INFO L226 Difference]: Without dead ends: 15103 [2021-06-05 23:14:33,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1136.5ms TimeCoverageRelationStatistics Valid=262, Invalid=2090, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:14:33,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15103 states. [2021-06-05 23:14:33,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15103 to 9711. [2021-06-05 23:14:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9711 states, 9710 states have (on average 2.461894953656025) internal successors, (23905), 9710 states have internal predecessors, (23905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9711 states to 9711 states and 23905 transitions. [2021-06-05 23:14:33,591 INFO L78 Accepts]: Start accepts. Automaton has 9711 states and 23905 transitions. Word has length 59 [2021-06-05 23:14:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:33,591 INFO L482 AbstractCegarLoop]: Abstraction has 9711 states and 23905 transitions. [2021-06-05 23:14:33,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 9711 states and 23905 transitions. [2021-06-05 23:14:33,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:33,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:33,596 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:33,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:33,797 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:33,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:33,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1469435049, now seen corresponding path program 76 times [2021-06-05 23:14:33,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:33,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517170950] [2021-06-05 23:14:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:34,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:34,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517170950] [2021-06-05 23:14:34,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517170950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:34,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006200596] [2021-06-05 23:14:34,102 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:34,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:34,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:34,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:14:34,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:34,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:34,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:14:34,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:34,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:34,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:34,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:14:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:34,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006200596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:34,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:34,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 24 [2021-06-05 23:14:34,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802570231] [2021-06-05 23:14:34,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:14:34,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:34,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:14:34,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:14:34,594 INFO L87 Difference]: Start difference. First operand 9711 states and 23905 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:36,190 INFO L93 Difference]: Finished difference Result 13955 states and 34295 transitions. [2021-06-05 23:14:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:14:36,190 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:36,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:36,207 INFO L225 Difference]: With dead ends: 13955 [2021-06-05 23:14:36,207 INFO L226 Difference]: Without dead ends: 13551 [2021-06-05 23:14:36,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1278.5ms TimeCoverageRelationStatistics Valid=272, Invalid=2080, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:14:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13551 states. [2021-06-05 23:14:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13551 to 10239. [2021-06-05 23:14:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10239 states, 10238 states have (on average 2.4601484664973627) internal successors, (25187), 10238 states have internal predecessors, (25187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:36,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10239 states to 10239 states and 25187 transitions. [2021-06-05 23:14:36,361 INFO L78 Accepts]: Start accepts. Automaton has 10239 states and 25187 transitions. Word has length 59 [2021-06-05 23:14:36,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:36,362 INFO L482 AbstractCegarLoop]: Abstraction has 10239 states and 25187 transitions. [2021-06-05 23:14:36,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:36,362 INFO L276 IsEmpty]: Start isEmpty. Operand 10239 states and 25187 transitions. [2021-06-05 23:14:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:36,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:36,368 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:36,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:36,568 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:36,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1609234263, now seen corresponding path program 77 times [2021-06-05 23:14:36,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:36,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779003768] [2021-06-05 23:14:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:36,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:36,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779003768] [2021-06-05 23:14:36,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779003768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:36,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814896898] [2021-06-05 23:14:36,828 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:36,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:14:36,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:36,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:14:36,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:37,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:37,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:37,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:37,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:14:37,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:37,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:37,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:37,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:14:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:37,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814896898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:37,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:37,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 24 [2021-06-05 23:14:37,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143836977] [2021-06-05 23:14:37,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:14:37,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:37,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:14:37,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:14:37,347 INFO L87 Difference]: Start difference. First operand 10239 states and 25187 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:39,023 INFO L93 Difference]: Finished difference Result 13031 states and 32033 transitions. [2021-06-05 23:14:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:14:39,023 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:39,036 INFO L225 Difference]: With dead ends: 13031 [2021-06-05 23:14:39,036 INFO L226 Difference]: Without dead ends: 12591 [2021-06-05 23:14:39,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1324.7ms TimeCoverageRelationStatistics Valid=260, Invalid=2290, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:14:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12591 states. [2021-06-05 23:14:39,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12591 to 9871. [2021-06-05 23:14:39,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9871 states, 9870 states have (on average 2.461094224924012) internal successors, (24291), 9870 states have internal predecessors, (24291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:39,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9871 states to 9871 states and 24291 transitions. [2021-06-05 23:14:39,180 INFO L78 Accepts]: Start accepts. Automaton has 9871 states and 24291 transitions. Word has length 59 [2021-06-05 23:14:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:39,180 INFO L482 AbstractCegarLoop]: Abstraction has 9871 states and 24291 transitions. [2021-06-05 23:14:39,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:39,180 INFO L276 IsEmpty]: Start isEmpty. Operand 9871 states and 24291 transitions. [2021-06-05 23:14:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:39,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:39,186 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:39,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:39,387 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:39,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:39,387 INFO L82 PathProgramCache]: Analyzing trace with hash 560577367, now seen corresponding path program 78 times [2021-06-05 23:14:39,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:39,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972359702] [2021-06-05 23:14:39,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:39,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:39,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972359702] [2021-06-05 23:14:39,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972359702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:39,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216609261] [2021-06-05 23:14:39,690 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:39,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:14:39,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:39,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 23:14:39,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:40,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:40,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:40,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:40,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:14:40,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:40,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:40,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:40,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:14:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 11 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:40,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216609261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:40,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:40,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 24 [2021-06-05 23:14:40,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865501244] [2021-06-05 23:14:40,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:14:40,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:40,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:14:40,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:14:40,189 INFO L87 Difference]: Start difference. First operand 9871 states and 24291 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:41,469 INFO L93 Difference]: Finished difference Result 14911 states and 36717 transitions. [2021-06-05 23:14:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:14:41,469 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:41,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:41,483 INFO L225 Difference]: With dead ends: 14911 [2021-06-05 23:14:41,484 INFO L226 Difference]: Without dead ends: 14559 [2021-06-05 23:14:41,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1056.6ms TimeCoverageRelationStatistics Valid=230, Invalid=1840, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:14:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14559 states. [2021-06-05 23:14:41,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14559 to 11871. [2021-06-05 23:14:41,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11871 states, 11870 states have (on average 2.458887952822241) internal successors, (29187), 11870 states have internal predecessors, (29187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:41,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11871 states to 11871 states and 29187 transitions. [2021-06-05 23:14:41,619 INFO L78 Accepts]: Start accepts. Automaton has 11871 states and 29187 transitions. Word has length 59 [2021-06-05 23:14:41,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:41,619 INFO L482 AbstractCegarLoop]: Abstraction has 11871 states and 29187 transitions. [2021-06-05 23:14:41,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:41,619 INFO L276 IsEmpty]: Start isEmpty. Operand 11871 states and 29187 transitions. [2021-06-05 23:14:41,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:41,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:41,627 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:41,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:41,827 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:41,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:41,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1552901463, now seen corresponding path program 79 times [2021-06-05 23:14:41,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:41,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582092944] [2021-06-05 23:14:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:42,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:42,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582092944] [2021-06-05 23:14:42,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582092944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:42,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135741355] [2021-06-05 23:14:42,192 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:42,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:14:42,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:42,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:42,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:42,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:42,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:14:42,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:42,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:42,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:42,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:14:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:42,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135741355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:42,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:42,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 24 [2021-06-05 23:14:42,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252389176] [2021-06-05 23:14:42,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:14:42,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:42,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:14:42,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:14:42,711 INFO L87 Difference]: Start difference. First operand 11871 states and 29187 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:43,634 INFO L93 Difference]: Finished difference Result 18871 states and 46707 transitions. [2021-06-05 23:14:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:14:43,635 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:43,653 INFO L225 Difference]: With dead ends: 18871 [2021-06-05 23:14:43,653 INFO L226 Difference]: Without dead ends: 18783 [2021-06-05 23:14:43,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1040.3ms TimeCoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:14:43,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18783 states. [2021-06-05 23:14:43,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18783 to 11535. [2021-06-05 23:14:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11535 states, 11534 states have (on average 2.4576903069186753) internal successors, (28347), 11534 states have internal predecessors, (28347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11535 states to 11535 states and 28347 transitions. [2021-06-05 23:14:43,804 INFO L78 Accepts]: Start accepts. Automaton has 11535 states and 28347 transitions. Word has length 59 [2021-06-05 23:14:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:43,804 INFO L482 AbstractCegarLoop]: Abstraction has 11535 states and 28347 transitions. [2021-06-05 23:14:43,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 11535 states and 28347 transitions. [2021-06-05 23:14:43,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:43,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:43,812 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:44,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:44,013 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:44,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:44,013 INFO L82 PathProgramCache]: Analyzing trace with hash 130878807, now seen corresponding path program 80 times [2021-06-05 23:14:44,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:44,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547194997] [2021-06-05 23:14:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:44,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:44,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547194997] [2021-06-05 23:14:44,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547194997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:44,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585219326] [2021-06-05 23:14:44,392 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:44,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:44,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:44,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:14:44,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:44,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:44,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:44,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:44,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:14:44,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:44,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:44,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:44,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:14:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:44,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585219326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:44,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:44,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-06-05 23:14:44,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981850995] [2021-06-05 23:14:44,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:14:44,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:44,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:14:44,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:14:44,981 INFO L87 Difference]: Start difference. First operand 11535 states and 28347 transitions. Second operand has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:46,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:46,264 INFO L93 Difference]: Finished difference Result 17463 states and 43379 transitions. [2021-06-05 23:14:46,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:14:46,265 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:46,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:46,282 INFO L225 Difference]: With dead ends: 17463 [2021-06-05 23:14:46,282 INFO L226 Difference]: Without dead ends: 17279 [2021-06-05 23:14:46,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1112.8ms TimeCoverageRelationStatistics Valid=259, Invalid=1997, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:14:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17279 states. [2021-06-05 23:14:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17279 to 11599. [2021-06-05 23:14:46,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11599 states, 11598 states have (on average 2.4579237799620626) internal successors, (28507), 11598 states have internal predecessors, (28507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11599 states to 11599 states and 28507 transitions. [2021-06-05 23:14:46,426 INFO L78 Accepts]: Start accepts. Automaton has 11599 states and 28507 transitions. Word has length 59 [2021-06-05 23:14:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:46,426 INFO L482 AbstractCegarLoop]: Abstraction has 11599 states and 28507 transitions. [2021-06-05 23:14:46,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 11599 states and 28507 transitions. [2021-06-05 23:14:46,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:46,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:46,434 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:46,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:46,634 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:46,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:46,634 INFO L82 PathProgramCache]: Analyzing trace with hash 741891415, now seen corresponding path program 81 times [2021-06-05 23:14:46,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:46,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939891264] [2021-06-05 23:14:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:46,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:46,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939891264] [2021-06-05 23:14:46,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939891264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:46,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278859731] [2021-06-05 23:14:46,981 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:47,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:14:47,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:47,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:14:47,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:47,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:47,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:47,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:47,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:47,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:47,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:47,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:47,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-06-05 23:14:47,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:47,896 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:14:47,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:47,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-06-05 23:14:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 13 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:47,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278859731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:47,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:47,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 23:14:47,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173691407] [2021-06-05 23:14:47,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:14:47,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:47,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:14:47,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:14:47,908 INFO L87 Difference]: Start difference. First operand 11599 states and 28507 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:50,872 INFO L93 Difference]: Finished difference Result 14723 states and 36187 transitions. [2021-06-05 23:14:50,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:14:50,872 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:50,921 INFO L225 Difference]: With dead ends: 14723 [2021-06-05 23:14:50,922 INFO L226 Difference]: Without dead ends: 14255 [2021-06-05 23:14:50,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 2269.6ms TimeCoverageRelationStatistics Valid=358, Invalid=2834, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:14:50,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14255 states. [2021-06-05 23:14:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14255 to 12031. [2021-06-05 23:14:51,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12031 states, 12030 states have (on average 2.4587697423108894) internal successors, (29579), 12030 states have internal predecessors, (29579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:51,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12031 states to 12031 states and 29579 transitions. [2021-06-05 23:14:51,040 INFO L78 Accepts]: Start accepts. Automaton has 12031 states and 29579 transitions. Word has length 59 [2021-06-05 23:14:51,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:51,040 INFO L482 AbstractCegarLoop]: Abstraction has 12031 states and 29579 transitions. [2021-06-05 23:14:51,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 12031 states and 29579 transitions. [2021-06-05 23:14:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:51,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:51,048 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:51,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 23:14:51,248 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:51,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:51,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1734215511, now seen corresponding path program 82 times [2021-06-05 23:14:51,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:51,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821931739] [2021-06-05 23:14:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:51,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:51,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821931739] [2021-06-05 23:14:51,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821931739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:51,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693044690] [2021-06-05 23:14:51,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:51,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:51,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:51,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:14:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:52,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:52,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:52,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:14:52,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:52,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:52,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:52,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:14:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:52,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693044690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:52,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:52,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 23 [2021-06-05 23:14:52,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822138669] [2021-06-05 23:14:52,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:14:52,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:52,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:14:52,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:14:52,056 INFO L87 Difference]: Start difference. First operand 12031 states and 29579 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:53,125 INFO L93 Difference]: Finished difference Result 18231 states and 45163 transitions. [2021-06-05 23:14:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:14:53,125 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:53,143 INFO L225 Difference]: With dead ends: 18231 [2021-06-05 23:14:53,143 INFO L226 Difference]: Without dead ends: 18143 [2021-06-05 23:14:53,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 991.0ms TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:14:53,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18143 states. [2021-06-05 23:14:53,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18143 to 11951. [2021-06-05 23:14:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11951 states, 11950 states have (on average 2.4584937238493723) internal successors, (29379), 11950 states have internal predecessors, (29379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11951 states to 11951 states and 29379 transitions. [2021-06-05 23:14:53,349 INFO L78 Accepts]: Start accepts. Automaton has 11951 states and 29379 transitions. Word has length 59 [2021-06-05 23:14:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:53,349 INFO L482 AbstractCegarLoop]: Abstraction has 11951 states and 29379 transitions. [2021-06-05 23:14:53,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 11951 states and 29379 transitions. [2021-06-05 23:14:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:53,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:53,356 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:53,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:53,557 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:53,557 INFO L82 PathProgramCache]: Analyzing trace with hash -335422633, now seen corresponding path program 83 times [2021-06-05 23:14:53,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:53,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603830055] [2021-06-05 23:14:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:53,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:53,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603830055] [2021-06-05 23:14:53,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603830055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:53,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786088281] [2021-06-05 23:14:53,825 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:53,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:14:53,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:53,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 23:14:53,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:54,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:54,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:54,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:54,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:54,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:54,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:54,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:54,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:54,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 38 [2021-06-05 23:14:54,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:54,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:54,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:54,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:98, output treesize:3 [2021-06-05 23:14:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:54,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786088281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:54,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:54,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 23:14:54,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635386502] [2021-06-05 23:14:54,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:14:54,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:54,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:14:54,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:14:54,535 INFO L87 Difference]: Start difference. First operand 11951 states and 29379 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:58,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:58,263 INFO L93 Difference]: Finished difference Result 20051 states and 49314 transitions. [2021-06-05 23:14:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:14:58,263 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:14:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:58,283 INFO L225 Difference]: With dead ends: 20051 [2021-06-05 23:14:58,283 INFO L226 Difference]: Without dead ends: 19783 [2021-06-05 23:14:58,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 2837.5ms TimeCoverageRelationStatistics Valid=460, Invalid=5392, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:14:58,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19783 states. [2021-06-05 23:14:58,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19783 to 12207. [2021-06-05 23:14:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12207 states, 12206 states have (on average 2.459364247091594) internal successors, (30019), 12206 states have internal predecessors, (30019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12207 states to 12207 states and 30019 transitions. [2021-06-05 23:14:58,451 INFO L78 Accepts]: Start accepts. Automaton has 12207 states and 30019 transitions. Word has length 59 [2021-06-05 23:14:58,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:58,451 INFO L482 AbstractCegarLoop]: Abstraction has 12207 states and 30019 transitions. [2021-06-05 23:14:58,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:58,451 INFO L276 IsEmpty]: Start isEmpty. Operand 12207 states and 30019 transitions. [2021-06-05 23:14:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:14:58,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:58,459 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:58,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 23:14:58,659 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:58,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:58,659 INFO L82 PathProgramCache]: Analyzing trace with hash 312192855, now seen corresponding path program 84 times [2021-06-05 23:14:58,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:58,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152007664] [2021-06-05 23:14:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:59,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:59,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152007664] [2021-06-05 23:14:59,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152007664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:59,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272325171] [2021-06-05 23:14:59,028 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:59,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:14:59,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:59,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:14:59,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:59,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:59,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:14:59,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:14:59,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:59,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:59,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:59,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:14:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:59,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272325171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:59,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:59,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2021-06-05 23:14:59,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417248119] [2021-06-05 23:14:59,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:14:59,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:59,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:14:59,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:14:59,543 INFO L87 Difference]: Start difference. First operand 12207 states and 30019 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:00,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:00,852 INFO L93 Difference]: Finished difference Result 18119 states and 44843 transitions. [2021-06-05 23:15:00,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:15:00,852 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:15:00,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:00,870 INFO L225 Difference]: With dead ends: 18119 [2021-06-05 23:15:00,870 INFO L226 Difference]: Without dead ends: 18031 [2021-06-05 23:15:00,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1152.8ms TimeCoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:15:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18031 states. [2021-06-05 23:15:00,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18031 to 12207. [2021-06-05 23:15:01,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12207 states, 12206 states have (on average 2.459364247091594) internal successors, (30019), 12206 states have internal predecessors, (30019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12207 states to 12207 states and 30019 transitions. [2021-06-05 23:15:01,020 INFO L78 Accepts]: Start accepts. Automaton has 12207 states and 30019 transitions. Word has length 59 [2021-06-05 23:15:01,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:01,020 INFO L482 AbstractCegarLoop]: Abstraction has 12207 states and 30019 transitions. [2021-06-05 23:15:01,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:01,020 INFO L276 IsEmpty]: Start isEmpty. Operand 12207 states and 30019 transitions. [2021-06-05 23:15:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:15:01,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:01,028 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:01,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:01,229 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:01,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1110759767, now seen corresponding path program 85 times [2021-06-05 23:15:01,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:01,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557626745] [2021-06-05 23:15:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:01,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:01,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557626745] [2021-06-05 23:15:01,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557626745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:01,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926110722] [2021-06-05 23:15:01,546 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:01,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:15:01,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:01,931 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-06-05 23:15:01,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:15:01,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:01,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:01,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:01,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:126, output treesize:7 [2021-06-05 23:15:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 7 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:01,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926110722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:01,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:01,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2021-06-05 23:15:01,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396882343] [2021-06-05 23:15:01,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:15:01,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:01,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:15:01,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:15:01,949 INFO L87 Difference]: Start difference. First operand 12207 states and 30019 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:02,937 INFO L93 Difference]: Finished difference Result 16227 states and 40031 transitions. [2021-06-05 23:15:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:15:02,937 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:15:02,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:02,958 INFO L225 Difference]: With dead ends: 16227 [2021-06-05 23:15:02,958 INFO L226 Difference]: Without dead ends: 16191 [2021-06-05 23:15:02,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 955.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:15:02,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16191 states. [2021-06-05 23:15:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16191 to 12239. [2021-06-05 23:15:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12239 states, 12238 states have (on average 2.4594705017159666) internal successors, (30099), 12238 states have internal predecessors, (30099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12239 states to 12239 states and 30099 transitions. [2021-06-05 23:15:03,109 INFO L78 Accepts]: Start accepts. Automaton has 12239 states and 30099 transitions. Word has length 59 [2021-06-05 23:15:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:03,110 INFO L482 AbstractCegarLoop]: Abstraction has 12239 states and 30099 transitions. [2021-06-05 23:15:03,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 12239 states and 30099 transitions. [2021-06-05 23:15:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-05 23:15:03,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:03,118 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:03,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:03,318 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:03,318 INFO L82 PathProgramCache]: Analyzing trace with hash 69241945, now seen corresponding path program 86 times [2021-06-05 23:15:03,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:03,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623907770] [2021-06-05 23:15:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 64 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:03,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:03,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623907770] [2021-06-05 23:15:03,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623907770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:03,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086209244] [2021-06-05 23:15:03,382 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:03,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:15:03,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:03,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:15:03,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 64 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:15:03,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086209244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:03,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:03,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 23:15:03,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376977871] [2021-06-05 23:15:03,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:15:03,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:03,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:15:03,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:15:03,489 INFO L87 Difference]: Start difference. First operand 12239 states and 30099 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:03,552 INFO L93 Difference]: Finished difference Result 14079 states and 34539 transitions. [2021-06-05 23:15:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:15:03,553 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-05 23:15:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:03,566 INFO L225 Difference]: With dead ends: 14079 [2021-06-05 23:15:03,566 INFO L226 Difference]: Without dead ends: 14071 [2021-06-05 23:15:03,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:15:03,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14071 states. [2021-06-05 23:15:03,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14071 to 12495. [2021-06-05 23:15:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12495 states, 12494 states have (on average 2.4615815591483914) internal successors, (30755), 12494 states have internal predecessors, (30755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12495 states to 12495 states and 30755 transitions. [2021-06-05 23:15:03,707 INFO L78 Accepts]: Start accepts. Automaton has 12495 states and 30755 transitions. Word has length 61 [2021-06-05 23:15:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:03,707 INFO L482 AbstractCegarLoop]: Abstraction has 12495 states and 30755 transitions. [2021-06-05 23:15:03,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 12495 states and 30755 transitions. [2021-06-05 23:15:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 23:15:03,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:03,715 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:03,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:03,915 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:03,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:03,915 INFO L82 PathProgramCache]: Analyzing trace with hash -462180397, now seen corresponding path program 87 times [2021-06-05 23:15:03,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:03,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830801619] [2021-06-05 23:15:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 8 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:15:04,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:04,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830801619] [2021-06-05 23:15:04,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830801619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:04,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572906042] [2021-06-05 23:15:04,207 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:04,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:15:04,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:04,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:15:04,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:04,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:04,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:04,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:04,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 23:15:04,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:04,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:04,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:04,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:15:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 8 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:15:04,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572906042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:04,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:04,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 25 [2021-06-05 23:15:04,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393441185] [2021-06-05 23:15:04,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:15:04,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:04,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:15:04,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:15:04,898 INFO L87 Difference]: Start difference. First operand 12495 states and 30755 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:07,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:07,289 INFO L93 Difference]: Finished difference Result 20747 states and 51611 transitions. [2021-06-05 23:15:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:15:07,290 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 23:15:07,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:07,312 INFO L225 Difference]: With dead ends: 20747 [2021-06-05 23:15:07,312 INFO L226 Difference]: Without dead ends: 20543 [2021-06-05 23:15:07,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2091.5ms TimeCoverageRelationStatistics Valid=449, Invalid=3457, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:15:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20543 states. [2021-06-05 23:15:07,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20543 to 12831. [2021-06-05 23:15:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12831 states, 12830 states have (on average 2.462587685113016) internal successors, (31595), 12830 states have internal predecessors, (31595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:07,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12831 states to 12831 states and 31595 transitions. [2021-06-05 23:15:07,514 INFO L78 Accepts]: Start accepts. Automaton has 12831 states and 31595 transitions. Word has length 63 [2021-06-05 23:15:07,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:07,514 INFO L482 AbstractCegarLoop]: Abstraction has 12831 states and 31595 transitions. [2021-06-05 23:15:07,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:07,514 INFO L276 IsEmpty]: Start isEmpty. Operand 12831 states and 31595 transitions. [2021-06-05 23:15:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:07,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:07,523 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:07,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:07,723 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:07,723 INFO L82 PathProgramCache]: Analyzing trace with hash -730260523, now seen corresponding path program 88 times [2021-06-05 23:15:07,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:07,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670998236] [2021-06-05 23:15:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:08,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:08,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670998236] [2021-06-05 23:15:08,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670998236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:08,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877065844] [2021-06-05 23:15:08,115 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:08,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:15:08,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:08,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:15:08,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:09,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:09,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:09,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:09,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:09,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:09,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:09,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:09,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:09,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:15:09,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:09,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:09,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:09,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:15:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:09,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877065844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:09,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:09,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-06-05 23:15:09,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625482976] [2021-06-05 23:15:09,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:15:09,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:09,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:15:09,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:15:09,135 INFO L87 Difference]: Start difference. First operand 12831 states and 31595 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:11,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:11,291 INFO L93 Difference]: Finished difference Result 26167 states and 65219 transitions. [2021-06-05 23:15:11,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:15:11,292 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:15:11,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:11,320 INFO L225 Difference]: With dead ends: 26167 [2021-06-05 23:15:11,321 INFO L226 Difference]: Without dead ends: 25935 [2021-06-05 23:15:11,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1715.6ms TimeCoverageRelationStatistics Valid=342, Invalid=3318, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:15:11,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25935 states. [2021-06-05 23:15:11,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25935 to 12767. [2021-06-05 23:15:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12767 states, 12766 states have (on average 2.4630267899107) internal successors, (31443), 12766 states have internal predecessors, (31443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12767 states to 12767 states and 31443 transitions. [2021-06-05 23:15:11,537 INFO L78 Accepts]: Start accepts. Automaton has 12767 states and 31443 transitions. Word has length 65 [2021-06-05 23:15:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:11,537 INFO L482 AbstractCegarLoop]: Abstraction has 12767 states and 31443 transitions. [2021-06-05 23:15:11,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 12767 states and 31443 transitions. [2021-06-05 23:15:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:11,546 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:11,547 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:11,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 23:15:11,761 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:11,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:11,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1063861717, now seen corresponding path program 89 times [2021-06-05 23:15:11,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:11,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773002468] [2021-06-05 23:15:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:12,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:12,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773002468] [2021-06-05 23:15:12,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773002468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:12,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128651802] [2021-06-05 23:15:12,136 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:12,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:15:12,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:12,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 23:15:12,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:13,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:13,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:13,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:13,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:13,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:13,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:13,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:13,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:13,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:13,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 44 [2021-06-05 23:15:13,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:13,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:13,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:13,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:3 [2021-06-05 23:15:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:13,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128651802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:13,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:13,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2021-06-05 23:15:13,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891019286] [2021-06-05 23:15:13,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:15:13,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:13,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:15:13,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:15:13,122 INFO L87 Difference]: Start difference. First operand 12767 states and 31443 transitions. Second operand has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:17,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:17,604 INFO L93 Difference]: Finished difference Result 24055 states and 59703 transitions. [2021-06-05 23:15:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:15:17,605 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:15:17,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:17,628 INFO L225 Difference]: With dead ends: 24055 [2021-06-05 23:15:17,628 INFO L226 Difference]: Without dead ends: 23455 [2021-06-05 23:15:17,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 2988.8ms TimeCoverageRelationStatistics Valid=429, Invalid=4541, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:15:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23455 states. [2021-06-05 23:15:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23455 to 13455. [2021-06-05 23:15:17,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13455 states, 13454 states have (on average 2.4631336405529956) internal successors, (33139), 13454 states have internal predecessors, (33139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13455 states to 13455 states and 33139 transitions. [2021-06-05 23:15:17,822 INFO L78 Accepts]: Start accepts. Automaton has 13455 states and 33139 transitions. Word has length 65 [2021-06-05 23:15:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:17,822 INFO L482 AbstractCegarLoop]: Abstraction has 13455 states and 33139 transitions. [2021-06-05 23:15:17,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 13455 states and 33139 transitions. [2021-06-05 23:15:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:17,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:17,832 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:18,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:18,033 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:18,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:18,033 INFO L82 PathProgramCache]: Analyzing trace with hash 73711061, now seen corresponding path program 90 times [2021-06-05 23:15:18,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:18,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683964216] [2021-06-05 23:15:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:18,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:18,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683964216] [2021-06-05 23:15:18,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683964216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:18,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394275820] [2021-06-05 23:15:18,366 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:18,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:15:18,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:18,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:15:18,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:19,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:19,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:19,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:19,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:19,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:19,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:19,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:19,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:15:19,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:19,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:19,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:19,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:15:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:19,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394275820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:19,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:19,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-06-05 23:15:19,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051253256] [2021-06-05 23:15:19,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:15:19,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:19,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:15:19,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:15:19,199 INFO L87 Difference]: Start difference. First operand 13455 states and 33139 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:21,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:21,032 INFO L93 Difference]: Finished difference Result 24487 states and 61059 transitions. [2021-06-05 23:15:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:15:21,032 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:15:21,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:21,057 INFO L225 Difference]: With dead ends: 24487 [2021-06-05 23:15:21,057 INFO L226 Difference]: Without dead ends: 24255 [2021-06-05 23:15:21,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1555.7ms TimeCoverageRelationStatistics Valid=348, Invalid=3434, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:15:21,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24255 states. [2021-06-05 23:15:21,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24255 to 11647. [2021-06-05 23:15:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11647 states, 11646 states have (on average 2.460844925296239) internal successors, (28659), 11646 states have internal predecessors, (28659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:21,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11647 states to 11647 states and 28659 transitions. [2021-06-05 23:15:21,249 INFO L78 Accepts]: Start accepts. Automaton has 11647 states and 28659 transitions. Word has length 65 [2021-06-05 23:15:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:21,249 INFO L482 AbstractCegarLoop]: Abstraction has 11647 states and 28659 transitions. [2021-06-05 23:15:21,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 11647 states and 28659 transitions. [2021-06-05 23:15:21,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:21,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:21,257 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:21,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 23:15:21,458 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:21,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:21,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1867833301, now seen corresponding path program 91 times [2021-06-05 23:15:21,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:21,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568771574] [2021-06-05 23:15:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:21,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:21,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568771574] [2021-06-05 23:15:21,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568771574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:21,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398765162] [2021-06-05 23:15:21,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:21,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:15:21,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:22,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:22,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:22,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:22,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:22,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:22,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:22,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:22,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:22,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:15:22,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:22,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:22,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:22,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:15:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:22,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398765162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:22,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:22,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-06-05 23:15:22,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594910673] [2021-06-05 23:15:22,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:15:22,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:22,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:15:22,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:15:22,659 INFO L87 Difference]: Start difference. First operand 11647 states and 28659 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:24,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:24,519 INFO L93 Difference]: Finished difference Result 20823 states and 51611 transitions. [2021-06-05 23:15:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:15:24,520 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:15:24,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:24,541 INFO L225 Difference]: With dead ends: 20823 [2021-06-05 23:15:24,541 INFO L226 Difference]: Without dead ends: 20783 [2021-06-05 23:15:24,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1531.3ms TimeCoverageRelationStatistics Valid=354, Invalid=3428, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:15:24,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20783 states. [2021-06-05 23:15:24,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20783 to 11631. [2021-06-05 23:15:24,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11631 states, 11630 states have (on average 2.4607910576096304) internal successors, (28619), 11630 states have internal predecessors, (28619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11631 states to 11631 states and 28619 transitions. [2021-06-05 23:15:24,721 INFO L78 Accepts]: Start accepts. Automaton has 11631 states and 28619 transitions. Word has length 65 [2021-06-05 23:15:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:24,721 INFO L482 AbstractCegarLoop]: Abstraction has 11631 states and 28619 transitions. [2021-06-05 23:15:24,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 11631 states and 28619 transitions. [2021-06-05 23:15:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:24,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:24,730 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:24,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:24,930 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:24,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:24,931 INFO L82 PathProgramCache]: Analyzing trace with hash -2139158059, now seen corresponding path program 92 times [2021-06-05 23:15:24,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:24,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733310951] [2021-06-05 23:15:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:25,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:25,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733310951] [2021-06-05 23:15:25,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733310951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:25,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834260019] [2021-06-05 23:15:25,366 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:25,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:15:25,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:25,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:15:25,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:26,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:26,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:26,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:26,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:26,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:26,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:26,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:26,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:26,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:15:26,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:26,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:26,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:26,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:15:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:26,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834260019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:26,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:26,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-06-05 23:15:26,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093212113] [2021-06-05 23:15:26,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:15:26,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:26,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:15:26,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:15:26,203 INFO L87 Difference]: Start difference. First operand 11631 states and 28619 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:27,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:27,620 INFO L93 Difference]: Finished difference Result 20559 states and 50855 transitions. [2021-06-05 23:15:27,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:15:27,621 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:15:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:27,641 INFO L225 Difference]: With dead ends: 20559 [2021-06-05 23:15:27,641 INFO L226 Difference]: Without dead ends: 20495 [2021-06-05 23:15:27,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1453.8ms TimeCoverageRelationStatistics Valid=303, Invalid=2889, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:15:27,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20495 states. [2021-06-05 23:15:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20495 to 12623. [2021-06-05 23:15:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12623 states, 12622 states have (on average 2.456266835683727) internal successors, (31003), 12622 states have internal predecessors, (31003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12623 states to 12623 states and 31003 transitions. [2021-06-05 23:15:27,833 INFO L78 Accepts]: Start accepts. Automaton has 12623 states and 31003 transitions. Word has length 65 [2021-06-05 23:15:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:27,833 INFO L482 AbstractCegarLoop]: Abstraction has 12623 states and 31003 transitions. [2021-06-05 23:15:27,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 12623 states and 31003 transitions. [2021-06-05 23:15:27,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:27,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:27,842 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:28,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:28,042 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:28,043 INFO L82 PathProgramCache]: Analyzing trace with hash 49742293, now seen corresponding path program 93 times [2021-06-05 23:15:28,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:28,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124774250] [2021-06-05 23:15:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:15:28,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:28,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124774250] [2021-06-05 23:15:28,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124774250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:28,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370212891] [2021-06-05 23:15:28,360 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:28,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:15:28,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:28,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-06-05 23:15:28,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:29,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:29,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:29,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:29,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:29,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:29,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:29,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:29,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:29,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:15:29,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:29,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:29,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:29,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:15:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 13 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:29,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370212891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:29,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:29,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 30 [2021-06-05 23:15:29,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897389646] [2021-06-05 23:15:29,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:15:29,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:29,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:15:29,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:15:29,225 INFO L87 Difference]: Start difference. First operand 12623 states and 31003 transitions. Second operand has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:30,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:30,627 INFO L93 Difference]: Finished difference Result 16735 states and 41197 transitions. [2021-06-05 23:15:30,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:15:30,627 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:15:30,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:30,643 INFO L225 Difference]: With dead ends: 16735 [2021-06-05 23:15:30,643 INFO L226 Difference]: Without dead ends: 16383 [2021-06-05 23:15:30,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1408.6ms TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:15:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16383 states. [2021-06-05 23:15:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16383 to 13615. [2021-06-05 23:15:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13615 states, 13614 states have (on average 2.457102982224181) internal successors, (33451), 13614 states have internal predecessors, (33451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:30,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13615 states to 13615 states and 33451 transitions. [2021-06-05 23:15:30,837 INFO L78 Accepts]: Start accepts. Automaton has 13615 states and 33451 transitions. Word has length 65 [2021-06-05 23:15:30,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:30,838 INFO L482 AbstractCegarLoop]: Abstraction has 13615 states and 33451 transitions. [2021-06-05 23:15:30,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:30,838 INFO L276 IsEmpty]: Start isEmpty. Operand 13615 states and 33451 transitions. [2021-06-05 23:15:30,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:30,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:30,847 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:31,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 23:15:31,047 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:31,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1456921643, now seen corresponding path program 94 times [2021-06-05 23:15:31,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:31,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073509218] [2021-06-05 23:15:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:31,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:31,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073509218] [2021-06-05 23:15:31,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073509218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:31,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176038607] [2021-06-05 23:15:31,355 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:31,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:15:31,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:31,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:15:31,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:32,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:32,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:32,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:32,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:32,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:32,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:32,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:32,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:32,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:15:32,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:32,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:32,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:32,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:15:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:32,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176038607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:32,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:32,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 31 [2021-06-05 23:15:32,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471860676] [2021-06-05 23:15:32,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:15:32,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:32,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:15:32,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:15:32,161 INFO L87 Difference]: Start difference. First operand 13615 states and 33451 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:33,454 INFO L93 Difference]: Finished difference Result 20887 states and 51699 transitions. [2021-06-05 23:15:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:15:33,455 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:15:33,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:33,476 INFO L225 Difference]: With dead ends: 20887 [2021-06-05 23:15:33,476 INFO L226 Difference]: Without dead ends: 20799 [2021-06-05 23:15:33,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1349.5ms TimeCoverageRelationStatistics Valid=271, Invalid=2591, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:15:33,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20799 states. [2021-06-05 23:15:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20799 to 13471. [2021-06-05 23:15:33,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13471 states, 13470 states have (on average 2.4566443949517445) internal successors, (33091), 13470 states have internal predecessors, (33091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13471 states to 13471 states and 33091 transitions. [2021-06-05 23:15:33,740 INFO L78 Accepts]: Start accepts. Automaton has 13471 states and 33091 transitions. Word has length 65 [2021-06-05 23:15:33,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:33,740 INFO L482 AbstractCegarLoop]: Abstraction has 13471 states and 33091 transitions. [2021-06-05 23:15:33,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:33,741 INFO L276 IsEmpty]: Start isEmpty. Operand 13471 states and 33091 transitions. [2021-06-05 23:15:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:33,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:33,750 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:33,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 23:15:33,951 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:33,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:33,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1596763093, now seen corresponding path program 95 times [2021-06-05 23:15:33,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:33,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096194956] [2021-06-05 23:15:33,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:34,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:34,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096194956] [2021-06-05 23:15:34,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096194956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:34,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735356384] [2021-06-05 23:15:34,337 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:34,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:15:34,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:34,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:15:34,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:35,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:35,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:35,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:35,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:35,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:35,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:35,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:35,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:35,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:15:35,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:35,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:35,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:35,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:15:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:35,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735356384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:35,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:35,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-06-05 23:15:35,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350815294] [2021-06-05 23:15:35,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:15:35,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:35,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:15:35,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:15:35,174 INFO L87 Difference]: Start difference. First operand 13471 states and 33091 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:36,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:36,999 INFO L93 Difference]: Finished difference Result 22039 states and 54763 transitions. [2021-06-05 23:15:36,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:15:37,000 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:15:37,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:37,023 INFO L225 Difference]: With dead ends: 22039 [2021-06-05 23:15:37,023 INFO L226 Difference]: Without dead ends: 21855 [2021-06-05 23:15:37,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1437.3ms TimeCoverageRelationStatistics Valid=307, Invalid=2885, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:15:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21855 states. [2021-06-05 23:15:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21855 to 13535. [2021-06-05 23:15:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13535 states, 13534 states have (on average 2.456849416284912) internal successors, (33251), 13534 states have internal predecessors, (33251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13535 states to 13535 states and 33251 transitions. [2021-06-05 23:15:37,280 INFO L78 Accepts]: Start accepts. Automaton has 13535 states and 33251 transitions. Word has length 65 [2021-06-05 23:15:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:37,281 INFO L482 AbstractCegarLoop]: Abstraction has 13535 states and 33251 transitions. [2021-06-05 23:15:37,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 13535 states and 33251 transitions. [2021-06-05 23:15:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:37,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:37,291 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:37,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:37,492 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:37,492 INFO L82 PathProgramCache]: Analyzing trace with hash 233515989, now seen corresponding path program 96 times [2021-06-05 23:15:37,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:37,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959420226] [2021-06-05 23:15:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:15:37,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:37,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959420226] [2021-06-05 23:15:37,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959420226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:37,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320984042] [2021-06-05 23:15:37,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:37,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:15:37,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:37,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-06-05 23:15:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:38,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:38,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:38,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:38,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:38,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:38,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:38,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:38,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:38,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:15:38,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:38,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:38,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:38,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:15:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 13 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:38,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320984042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:38,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:38,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 30 [2021-06-05 23:15:38,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298377736] [2021-06-05 23:15:38,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:15:38,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:15:38,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:15:38,654 INFO L87 Difference]: Start difference. First operand 13535 states and 33251 transitions. Second operand has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:39,817 INFO L93 Difference]: Finished difference Result 16767 states and 41237 transitions. [2021-06-05 23:15:39,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:15:39,818 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:15:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:39,835 INFO L225 Difference]: With dead ends: 16767 [2021-06-05 23:15:39,835 INFO L226 Difference]: Without dead ends: 16447 [2021-06-05 23:15:39,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1338.0ms TimeCoverageRelationStatistics Valid=234, Invalid=2216, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:15:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16447 states. [2021-06-05 23:15:39,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16447 to 14319. [2021-06-05 23:15:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14319 states, 14318 states have (on average 2.456418494203101) internal successors, (35171), 14318 states have internal predecessors, (35171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:40,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14319 states to 14319 states and 35171 transitions. [2021-06-05 23:15:40,017 INFO L78 Accepts]: Start accepts. Automaton has 14319 states and 35171 transitions. Word has length 65 [2021-06-05 23:15:40,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:40,017 INFO L482 AbstractCegarLoop]: Abstraction has 14319 states and 35171 transitions. [2021-06-05 23:15:40,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:40,017 INFO L276 IsEmpty]: Start isEmpty. Operand 14319 states and 35171 transitions. [2021-06-05 23:15:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:40,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:40,029 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:40,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 23:15:40,230 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:40,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:40,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1273147947, now seen corresponding path program 97 times [2021-06-05 23:15:40,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:40,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835402496] [2021-06-05 23:15:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:40,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:40,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835402496] [2021-06-05 23:15:40,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835402496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:40,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832316921] [2021-06-05 23:15:40,533 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:15:40,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:41,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:41,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:41,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:41,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:41,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:41,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:41,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:41,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:41,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:15:41,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:41,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:41,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:41,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:15:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:41,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832316921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:41,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:41,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 31 [2021-06-05 23:15:41,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012526067] [2021-06-05 23:15:41,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:15:41,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:41,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:15:41,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:15:41,421 INFO L87 Difference]: Start difference. First operand 14319 states and 35171 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:42,867 INFO L93 Difference]: Finished difference Result 21095 states and 52219 transitions. [2021-06-05 23:15:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:15:42,868 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:15:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:42,888 INFO L225 Difference]: With dead ends: 21095 [2021-06-05 23:15:42,889 INFO L226 Difference]: Without dead ends: 21007 [2021-06-05 23:15:42,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1325.3ms TimeCoverageRelationStatistics Valid=249, Invalid=2403, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:15:42,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21007 states. [2021-06-05 23:15:43,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21007 to 14239. [2021-06-05 23:15:43,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14239 states, 14238 states have (on average 2.4561736198904343) internal successors, (34971), 14238 states have internal predecessors, (34971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14239 states to 14239 states and 34971 transitions. [2021-06-05 23:15:43,089 INFO L78 Accepts]: Start accepts. Automaton has 14239 states and 34971 transitions. Word has length 65 [2021-06-05 23:15:43,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:43,089 INFO L482 AbstractCegarLoop]: Abstraction has 14239 states and 34971 transitions. [2021-06-05 23:15:43,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:43,090 INFO L276 IsEmpty]: Start isEmpty. Operand 14239 states and 34971 transitions. [2021-06-05 23:15:43,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:43,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:43,099 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:43,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 23:15:43,300 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:43,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:43,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1298132523, now seen corresponding path program 98 times [2021-06-05 23:15:43,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:43,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566118309] [2021-06-05 23:15:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:43,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:43,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566118309] [2021-06-05 23:15:43,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566118309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:43,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655529996] [2021-06-05 23:15:43,646 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:43,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:15:43,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:43,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:15:43,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:44,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:44,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:44,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:44,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:44,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:44,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:44,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:44,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:44,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:15:44,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:44,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:44,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:44,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:15:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:44,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655529996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:44,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:44,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-06-05 23:15:44,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016571937] [2021-06-05 23:15:44,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:15:44,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:44,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:15:44,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:15:44,516 INFO L87 Difference]: Start difference. First operand 14239 states and 34971 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:45,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:45,650 INFO L93 Difference]: Finished difference Result 24103 states and 59715 transitions. [2021-06-05 23:15:45,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:15:45,651 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:15:45,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:45,674 INFO L225 Difference]: With dead ends: 24103 [2021-06-05 23:15:45,674 INFO L226 Difference]: Without dead ends: 24015 [2021-06-05 23:15:45,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1505.3ms TimeCoverageRelationStatistics Valid=294, Invalid=2786, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:15:45,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24015 states. [2021-06-05 23:15:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24015 to 14063. [2021-06-05 23:15:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14063 states, 14062 states have (on average 2.4556250888920497) internal successors, (34531), 14062 states have internal predecessors, (34531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14063 states to 14063 states and 34531 transitions. [2021-06-05 23:15:45,890 INFO L78 Accepts]: Start accepts. Automaton has 14063 states and 34531 transitions. Word has length 65 [2021-06-05 23:15:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:45,890 INFO L482 AbstractCegarLoop]: Abstraction has 14063 states and 34531 transitions. [2021-06-05 23:15:45,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 14063 states and 34531 transitions. [2021-06-05 23:15:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:45,900 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:45,900 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:46,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 23:15:46,101 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:46,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:46,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1780536789, now seen corresponding path program 99 times [2021-06-05 23:15:46,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:46,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973013550] [2021-06-05 23:15:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:46,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:46,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973013550] [2021-06-05 23:15:46,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973013550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:46,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567153730] [2021-06-05 23:15:46,450 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:46,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:15:46,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:46,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:15:46,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:47,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:47,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:47,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:47,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:47,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:47,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:47,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:47,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:47,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:15:47,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:47,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:47,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:47,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:15:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:47,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567153730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:47,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:47,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-06-05 23:15:47,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948239955] [2021-06-05 23:15:47,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:15:47,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:47,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:15:47,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:15:47,326 INFO L87 Difference]: Start difference. First operand 14063 states and 34531 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:48,761 INFO L93 Difference]: Finished difference Result 22903 states and 56715 transitions. [2021-06-05 23:15:48,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:15:48,762 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:15:48,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:48,786 INFO L225 Difference]: With dead ends: 22903 [2021-06-05 23:15:48,786 INFO L226 Difference]: Without dead ends: 22815 [2021-06-05 23:15:48,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1460.4ms TimeCoverageRelationStatistics Valid=307, Invalid=2885, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:15:48,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22815 states. [2021-06-05 23:15:49,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22815 to 14063. [2021-06-05 23:15:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14063 states, 14062 states have (on average 2.4556250888920497) internal successors, (34531), 14062 states have internal predecessors, (34531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:49,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14063 states to 14063 states and 34531 transitions. [2021-06-05 23:15:49,048 INFO L78 Accepts]: Start accepts. Automaton has 14063 states and 34531 transitions. Word has length 65 [2021-06-05 23:15:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:49,048 INFO L482 AbstractCegarLoop]: Abstraction has 14063 states and 34531 transitions. [2021-06-05 23:15:49,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 14063 states and 34531 transitions. [2021-06-05 23:15:49,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:49,057 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:49,057 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:49,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:49,258 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:49,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:49,258 INFO L82 PathProgramCache]: Analyzing trace with hash -644843563, now seen corresponding path program 100 times [2021-06-05 23:15:49,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:49,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742684080] [2021-06-05 23:15:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:49,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:49,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742684080] [2021-06-05 23:15:49,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742684080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:49,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650908139] [2021-06-05 23:15:49,604 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:49,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:15:49,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:49,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:15:49,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:50,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:50,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:50,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:50,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:50,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:50,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:50,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:50,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:50,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:15:50,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:50,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:50,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:50,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:15:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:50,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650908139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:50,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:50,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2021-06-05 23:15:50,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919077118] [2021-06-05 23:15:50,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:15:50,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:50,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:15:50,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:15:50,430 INFO L87 Difference]: Start difference. First operand 14063 states and 34531 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:52,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:52,343 INFO L93 Difference]: Finished difference Result 20679 states and 51067 transitions. [2021-06-05 23:15:52,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:15:52,343 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:15:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:52,364 INFO L225 Difference]: With dead ends: 20679 [2021-06-05 23:15:52,364 INFO L226 Difference]: Without dead ends: 20639 [2021-06-05 23:15:52,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1374.2ms TimeCoverageRelationStatistics Valid=295, Invalid=2785, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:15:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20639 states. [2021-06-05 23:15:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20639 to 14079. [2021-06-05 23:15:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14079 states, 14078 states have (on average 2.455675522091206) internal successors, (34571), 14078 states have internal predecessors, (34571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:52,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14079 states to 14079 states and 34571 transitions. [2021-06-05 23:15:52,554 INFO L78 Accepts]: Start accepts. Automaton has 14079 states and 34571 transitions. Word has length 65 [2021-06-05 23:15:52,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:52,554 INFO L482 AbstractCegarLoop]: Abstraction has 14079 states and 34571 transitions. [2021-06-05 23:15:52,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:52,554 INFO L276 IsEmpty]: Start isEmpty. Operand 14079 states and 34571 transitions. [2021-06-05 23:15:52,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:52,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:52,564 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:52,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 23:15:52,764 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:52,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:52,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1077400619, now seen corresponding path program 101 times [2021-06-05 23:15:52,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:52,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728658536] [2021-06-05 23:15:52,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:53,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:53,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728658536] [2021-06-05 23:15:53,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728658536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:53,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868485508] [2021-06-05 23:15:53,278 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 [2021-06-05 23:15:53,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:15:53,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:53,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-06-05 23:15:53,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:54,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:54,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:54,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:54,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:54,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:54,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:54,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:15:54,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:54,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:54,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:54,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:15:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:54,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868485508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:54,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:54,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 33 [2021-06-05 23:15:54,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611273031] [2021-06-05 23:15:54,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:15:54,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:54,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:15:54,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:15:54,239 INFO L87 Difference]: Start difference. First operand 14079 states and 34571 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:55,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:55,824 INFO L93 Difference]: Finished difference Result 24675 states and 60920 transitions. [2021-06-05 23:15:55,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:15:55,824 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:15:55,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:55,848 INFO L225 Difference]: With dead ends: 24675 [2021-06-05 23:15:55,848 INFO L226 Difference]: Without dead ends: 24183 [2021-06-05 23:15:55,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1779.0ms TimeCoverageRelationStatistics Valid=349, Invalid=3311, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:15:55,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24183 states. [2021-06-05 23:15:56,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24183 to 16303. [2021-06-05 23:15:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16303 states, 16302 states have (on average 2.457796589375537) internal successors, (40067), 16302 states have internal predecessors, (40067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16303 states to 16303 states and 40067 transitions. [2021-06-05 23:15:56,078 INFO L78 Accepts]: Start accepts. Automaton has 16303 states and 40067 transitions. Word has length 65 [2021-06-05 23:15:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:56,079 INFO L482 AbstractCegarLoop]: Abstraction has 16303 states and 40067 transitions. [2021-06-05 23:15:56,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 16303 states and 40067 transitions. [2021-06-05 23:15:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:15:56,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:56,091 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:56,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 23:15:56,292 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:56,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:56,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1111499733, now seen corresponding path program 102 times [2021-06-05 23:15:56,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:56,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642496595] [2021-06-05 23:15:56,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:56,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:56,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642496595] [2021-06-05 23:15:56,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642496595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:56,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619873307] [2021-06-05 23:15:56,660 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 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 [2021-06-05 23:15:56,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:15:56,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:56,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 23:15:56,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:57,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:57,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:57,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:57,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:57,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:57,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:15:57,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:57,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 55 [2021-06-05 23:15:57,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:57,770 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:15:57,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:57,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:161, output treesize:7 [2021-06-05 23:15:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:57,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619873307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:57,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:57,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 30 [2021-06-05 23:15:57,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467929681] [2021-06-05 23:15:57,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:15:57,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:57,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:15:57,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:15:57,783 INFO L87 Difference]: Start difference. First operand 16303 states and 40067 transitions. Second operand has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:01,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:01,215 INFO L93 Difference]: Finished difference Result 21779 states and 53546 transitions. [2021-06-05 23:16:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:16:01,215 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:01,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:01,236 INFO L225 Difference]: With dead ends: 21779 [2021-06-05 23:16:01,236 INFO L226 Difference]: Without dead ends: 21335 [2021-06-05 23:16:01,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 2044.8ms TimeCoverageRelationStatistics Valid=284, Invalid=3022, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:16:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21335 states. [2021-06-05 23:16:01,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21335 to 18591. [2021-06-05 23:16:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18591 states, 18590 states have (on average 2.4615922538999464) internal successors, (45761), 18590 states have internal predecessors, (45761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:01,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18591 states to 18591 states and 45761 transitions. [2021-06-05 23:16:01,455 INFO L78 Accepts]: Start accepts. Automaton has 18591 states and 45761 transitions. Word has length 65 [2021-06-05 23:16:01,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:01,455 INFO L482 AbstractCegarLoop]: Abstraction has 18591 states and 45761 transitions. [2021-06-05 23:16:01,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:01,455 INFO L276 IsEmpty]: Start isEmpty. Operand 18591 states and 45761 transitions. [2021-06-05 23:16:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:01,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:01,469 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:01,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:01,670 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:01,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:01,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1636446763, now seen corresponding path program 103 times [2021-06-05 23:16:01,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:01,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198140992] [2021-06-05 23:16:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:02,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:02,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198140992] [2021-06-05 23:16:02,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198140992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:02,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853028952] [2021-06-05 23:16:02,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:02,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:02,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:02,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:02,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:02,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:02,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:02,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:02,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:02,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:02,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:02,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:02,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:02,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:02,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:02,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853028952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:02,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:02,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 33 [2021-06-05 23:16:02,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534771067] [2021-06-05 23:16:02,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:16:02,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:02,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:16:02,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:16:02,965 INFO L87 Difference]: Start difference. First operand 18591 states and 45761 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:04,209 INFO L93 Difference]: Finished difference Result 27583 states and 68478 transitions. [2021-06-05 23:16:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:16:04,209 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:04,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:04,238 INFO L225 Difference]: With dead ends: 27583 [2021-06-05 23:16:04,238 INFO L226 Difference]: Without dead ends: 27351 [2021-06-05 23:16:04,238 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1511.5ms TimeCoverageRelationStatistics Valid=311, Invalid=2881, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:16:04,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27351 states. [2021-06-05 23:16:04,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27351 to 18767. [2021-06-05 23:16:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18767 states, 18766 states have (on average 2.4615261643397632) internal successors, (46193), 18766 states have internal predecessors, (46193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:04,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18767 states to 18767 states and 46193 transitions. [2021-06-05 23:16:04,523 INFO L78 Accepts]: Start accepts. Automaton has 18767 states and 46193 transitions. Word has length 65 [2021-06-05 23:16:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:04,523 INFO L482 AbstractCegarLoop]: Abstraction has 18767 states and 46193 transitions. [2021-06-05 23:16:04,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 18767 states and 46193 transitions. [2021-06-05 23:16:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:04,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:04,537 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:04,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:04,738 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:04,738 INFO L82 PathProgramCache]: Analyzing trace with hash -211390507, now seen corresponding path program 104 times [2021-06-05 23:16:04,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:04,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206312009] [2021-06-05 23:16:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:16:05,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:05,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206312009] [2021-06-05 23:16:05,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206312009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:05,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607040189] [2021-06-05 23:16:05,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:05,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:16:05,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:05,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:05,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:05,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:05,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:05,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:05,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:05,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:05,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:05,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:05,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:05,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:05,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:05,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 11 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:05,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607040189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:05,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:05,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 30 [2021-06-05 23:16:05,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267121396] [2021-06-05 23:16:05,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:16:05,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:05,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:16:05,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:16:05,797 INFO L87 Difference]: Start difference. First operand 18767 states and 46193 transitions. Second operand has 31 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 30 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:08,281 INFO L93 Difference]: Finished difference Result 26623 states and 65734 transitions. [2021-06-05 23:16:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:16:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 30 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:08,313 INFO L225 Difference]: With dead ends: 26623 [2021-06-05 23:16:08,313 INFO L226 Difference]: Without dead ends: 26103 [2021-06-05 23:16:08,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1896.4ms TimeCoverageRelationStatistics Valid=353, Invalid=3307, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:16:08,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26103 states. [2021-06-05 23:16:08,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26103 to 19727. [2021-06-05 23:16:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19727 states, 19726 states have (on average 2.462181891919294) internal successors, (48569), 19726 states have internal predecessors, (48569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19727 states to 19727 states and 48569 transitions. [2021-06-05 23:16:08,643 INFO L78 Accepts]: Start accepts. Automaton has 19727 states and 48569 transitions. Word has length 65 [2021-06-05 23:16:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:08,643 INFO L482 AbstractCegarLoop]: Abstraction has 19727 states and 48569 transitions. [2021-06-05 23:16:08,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 30 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:08,643 INFO L276 IsEmpty]: Start isEmpty. Operand 19727 states and 48569 transitions. [2021-06-05 23:16:08,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:08,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:08,659 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:08,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:08,859 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:08,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:08,859 INFO L82 PathProgramCache]: Analyzing trace with hash -236375083, now seen corresponding path program 105 times [2021-06-05 23:16:08,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:08,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677793412] [2021-06-05 23:16:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:09,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:09,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677793412] [2021-06-05 23:16:09,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677793412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:09,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493999236] [2021-06-05 23:16:09,189 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:09,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:16:09,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:09,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-06-05 23:16:09,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:09,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:09,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:09,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:09,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:09,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:09,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:09,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:09,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:09,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:09,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:09,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:09,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:09,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493999236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:09,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:09,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 32 [2021-06-05 23:16:09,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431165025] [2021-06-05 23:16:09,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:09,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:09,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:09,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:09,985 INFO L87 Difference]: Start difference. First operand 19727 states and 48569 transitions. Second operand has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:11,761 INFO L93 Difference]: Finished difference Result 32131 states and 79518 transitions. [2021-06-05 23:16:11,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:16:11,761 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:11,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:11,796 INFO L225 Difference]: With dead ends: 32131 [2021-06-05 23:16:11,796 INFO L226 Difference]: Without dead ends: 31719 [2021-06-05 23:16:11,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1389.0ms TimeCoverageRelationStatistics Valid=298, Invalid=2782, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:16:11,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31719 states. [2021-06-05 23:16:12,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31719 to 19679. [2021-06-05 23:16:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19679 states, 19678 states have (on average 2.4620896432564283) internal successors, (48449), 19678 states have internal predecessors, (48449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:12,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19679 states to 19679 states and 48449 transitions. [2021-06-05 23:16:12,085 INFO L78 Accepts]: Start accepts. Automaton has 19679 states and 48449 transitions. Word has length 65 [2021-06-05 23:16:12,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:12,085 INFO L482 AbstractCegarLoop]: Abstraction has 19679 states and 48449 transitions. [2021-06-05 23:16:12,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:12,085 INFO L276 IsEmpty]: Start isEmpty. Operand 19679 states and 48449 transitions. [2021-06-05 23:16:12,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:12,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:12,101 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:12,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:12,302 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:12,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:12,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1452673067, now seen corresponding path program 106 times [2021-06-05 23:16:12,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:12,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729531605] [2021-06-05 23:16:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:12,586 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 23:16:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:12,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:12,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729531605] [2021-06-05 23:16:12,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729531605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:12,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165843405] [2021-06-05 23:16:12,752 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:12,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:16:12,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:12,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:12,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:13,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:13,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:13,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:13,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:13,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:13,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:13,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:13,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:13,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:13,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:13,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:13,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:13,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165843405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:13,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:13,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 33 [2021-06-05 23:16:13,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907273255] [2021-06-05 23:16:13,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:16:13,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:13,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:16:13,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:16:13,549 INFO L87 Difference]: Start difference. First operand 19679 states and 48449 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:15,263 INFO L93 Difference]: Finished difference Result 28103 states and 69577 transitions. [2021-06-05 23:16:15,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:16:15,264 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:15,295 INFO L225 Difference]: With dead ends: 28103 [2021-06-05 23:16:15,295 INFO L226 Difference]: Without dead ends: 28015 [2021-06-05 23:16:15,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1508.2ms TimeCoverageRelationStatistics Valid=311, Invalid=2881, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:16:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28015 states. [2021-06-05 23:16:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28015 to 19743. [2021-06-05 23:16:15,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19743 states, 19742 states have (on average 2.462212541789079) internal successors, (48609), 19742 states have internal predecessors, (48609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19743 states to 19743 states and 48609 transitions. [2021-06-05 23:16:15,571 INFO L78 Accepts]: Start accepts. Automaton has 19743 states and 48609 transitions. Word has length 65 [2021-06-05 23:16:15,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:15,571 INFO L482 AbstractCegarLoop]: Abstraction has 19743 states and 48609 transitions. [2021-06-05 23:16:15,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:15,571 INFO L276 IsEmpty]: Start isEmpty. Operand 19743 states and 48609 transitions. [2021-06-05 23:16:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:15,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:15,587 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:15,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 23:16:15,787 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:15,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:15,788 INFO L82 PathProgramCache]: Analyzing trace with hash 416913877, now seen corresponding path program 107 times [2021-06-05 23:16:15,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:15,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664796020] [2021-06-05 23:16:15,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:16,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:16,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664796020] [2021-06-05 23:16:16,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664796020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:16,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082573034] [2021-06-05 23:16:16,226 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:16,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:16:16,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:16,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 23:16:16,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:17,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:17,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:17,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:17,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:17,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:17,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:17,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:17,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:17,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 44 [2021-06-05 23:16:17,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:17,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:17,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:17,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:3 [2021-06-05 23:16:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:17,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082573034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:17,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:17,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-06-05 23:16:17,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809133080] [2021-06-05 23:16:17,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:16:17,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:17,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:16:17,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:16:17,309 INFO L87 Difference]: Start difference. First operand 19743 states and 48609 transitions. Second operand has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:20,835 INFO L93 Difference]: Finished difference Result 27223 states and 67356 transitions. [2021-06-05 23:16:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:16:20,836 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:20,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:20,866 INFO L225 Difference]: With dead ends: 27223 [2021-06-05 23:16:20,867 INFO L226 Difference]: Without dead ends: 26743 [2021-06-05 23:16:20,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 2690.3ms TimeCoverageRelationStatistics Valid=355, Invalid=3805, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:16:20,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26743 states. [2021-06-05 23:16:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26743 to 19999. [2021-06-05 23:16:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19999 states, 19998 states have (on average 2.4622962296229622) internal successors, (49241), 19998 states have internal predecessors, (49241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19999 states to 19999 states and 49241 transitions. [2021-06-05 23:16:21,136 INFO L78 Accepts]: Start accepts. Automaton has 19999 states and 49241 transitions. Word has length 65 [2021-06-05 23:16:21,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:21,136 INFO L482 AbstractCegarLoop]: Abstraction has 19999 states and 49241 transitions. [2021-06-05 23:16:21,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 19999 states and 49241 transitions. [2021-06-05 23:16:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:21,152 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:21,152 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:21,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 23:16:21,354 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:21,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:21,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1215526869, now seen corresponding path program 108 times [2021-06-05 23:16:21,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:21,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178992915] [2021-06-05 23:16:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:21,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:21,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178992915] [2021-06-05 23:16:21,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178992915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:21,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040855443] [2021-06-05 23:16:21,706 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:21,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:16:21,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:21,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:21,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:22,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:22,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:22,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:22,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:22,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:22,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:22,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:22,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:22,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:22,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:22,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:22,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040855443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:22,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:22,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-06-05 23:16:22,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634590118] [2021-06-05 23:16:22,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:22,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:22,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:22,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:22,512 INFO L87 Difference]: Start difference. First operand 19999 states and 49241 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:24,220 INFO L93 Difference]: Finished difference Result 34399 states and 85414 transitions. [2021-06-05 23:16:24,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:16:24,220 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:24,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:24,260 INFO L225 Difference]: With dead ends: 34399 [2021-06-05 23:16:24,260 INFO L226 Difference]: Without dead ends: 34119 [2021-06-05 23:16:24,260 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1508.7ms TimeCoverageRelationStatistics Valid=342, Invalid=3080, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:16:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34119 states. [2021-06-05 23:16:24,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34119 to 20975. [2021-06-05 23:16:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20975 states, 20974 states have (on average 2.4640507294745877) internal successors, (51681), 20974 states have internal predecessors, (51681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20975 states to 20975 states and 51681 transitions. [2021-06-05 23:16:24,579 INFO L78 Accepts]: Start accepts. Automaton has 20975 states and 51681 transitions. Word has length 65 [2021-06-05 23:16:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:24,580 INFO L482 AbstractCegarLoop]: Abstraction has 20975 states and 51681 transitions. [2021-06-05 23:16:24,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 20975 states and 51681 transitions. [2021-06-05 23:16:24,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:24,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:24,596 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:24,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 23:16:24,797 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:24,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:24,797 INFO L82 PathProgramCache]: Analyzing trace with hash -147720235, now seen corresponding path program 109 times [2021-06-05 23:16:24,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:24,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724195340] [2021-06-05 23:16:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:16:25,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:25,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724195340] [2021-06-05 23:16:25,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724195340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:25,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519133213] [2021-06-05 23:16:25,061 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:25,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:25,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:25,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:25,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:25,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:25,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:25,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:25,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:25,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:25,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:25,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:25,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:25,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:25,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519133213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:25,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:25,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 28 [2021-06-05 23:16:25,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874266341] [2021-06-05 23:16:25,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:16:25,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:25,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:16:25,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:16:25,748 INFO L87 Difference]: Start difference. First operand 20975 states and 51681 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:26,742 INFO L93 Difference]: Finished difference Result 25435 states and 62776 transitions. [2021-06-05 23:16:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:16:26,742 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:26,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:26,771 INFO L225 Difference]: With dead ends: 25435 [2021-06-05 23:16:26,771 INFO L226 Difference]: Without dead ends: 25335 [2021-06-05 23:16:26,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1164.8ms TimeCoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:16:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25335 states. [2021-06-05 23:16:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25335 to 21167. [2021-06-05 23:16:27,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21167 states, 21166 states have (on average 2.463904374940943) internal successors, (52151), 21166 states have internal predecessors, (52151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:27,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21167 states to 21167 states and 52151 transitions. [2021-06-05 23:16:27,089 INFO L78 Accepts]: Start accepts. Automaton has 21167 states and 52151 transitions. Word has length 65 [2021-06-05 23:16:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:27,089 INFO L482 AbstractCegarLoop]: Abstraction has 21167 states and 52151 transitions. [2021-06-05 23:16:27,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 21167 states and 52151 transitions. [2021-06-05 23:16:27,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:27,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:27,105 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:27,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:27,305 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:27,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:27,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1399300565, now seen corresponding path program 110 times [2021-06-05 23:16:27,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:27,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344054443] [2021-06-05 23:16:27,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:27,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:27,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344054443] [2021-06-05 23:16:27,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344054443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:27,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508571084] [2021-06-05 23:16:27,657 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:27,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:16:27,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:27,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:27,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:28,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:28,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:28,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:28,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:28,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:28,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:28,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:28,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:28,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:28,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:28,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:28,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508571084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:28,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:28,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-06-05 23:16:28,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394499436] [2021-06-05 23:16:28,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:28,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:28,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:28,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:28,424 INFO L87 Difference]: Start difference. First operand 21167 states and 52151 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:29,544 INFO L93 Difference]: Finished difference Result 31631 states and 78302 transitions. [2021-06-05 23:16:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:16:29,545 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:29,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:29,579 INFO L225 Difference]: With dead ends: 31631 [2021-06-05 23:16:29,579 INFO L226 Difference]: Without dead ends: 31543 [2021-06-05 23:16:29,580 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1396.9ms TimeCoverageRelationStatistics Valid=309, Invalid=2771, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:16:29,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31543 states. [2021-06-05 23:16:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31543 to 21103. [2021-06-05 23:16:29,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21103 states, 21102 states have (on average 2.463794900957255) internal successors, (51991), 21102 states have internal predecessors, (51991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21103 states to 21103 states and 51991 transitions. [2021-06-05 23:16:29,880 INFO L78 Accepts]: Start accepts. Automaton has 21103 states and 51991 transitions. Word has length 65 [2021-06-05 23:16:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:29,880 INFO L482 AbstractCegarLoop]: Abstraction has 21103 states and 51991 transitions. [2021-06-05 23:16:29,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 21103 states and 51991 transitions. [2021-06-05 23:16:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:29,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:29,896 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:30,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 23:16:30,096 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:30,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:30,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1026079787, now seen corresponding path program 111 times [2021-06-05 23:16:30,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:30,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748027621] [2021-06-05 23:16:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:30,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:30,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748027621] [2021-06-05 23:16:30,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748027621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:30,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343329151] [2021-06-05 23:16:30,450 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:30,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:16:30,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:30,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:30,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:31,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:31,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:31,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:31,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:31,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:31,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:31,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:31,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:31,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:31,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:31,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:31,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343329151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:31,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:31,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-06-05 23:16:31,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775047210] [2021-06-05 23:16:31,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:31,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:31,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:31,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:31,302 INFO L87 Difference]: Start difference. First operand 21103 states and 51991 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:32,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:32,474 INFO L93 Difference]: Finished difference Result 29239 states and 72271 transitions. [2021-06-05 23:16:32,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:16:32,474 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:32,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:32,511 INFO L225 Difference]: With dead ends: 29239 [2021-06-05 23:16:32,511 INFO L226 Difference]: Without dead ends: 29199 [2021-06-05 23:16:32,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1448.3ms TimeCoverageRelationStatistics Valid=297, Invalid=2673, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:16:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29199 states. [2021-06-05 23:16:32,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29199 to 21103. [2021-06-05 23:16:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21103 states, 21102 states have (on average 2.463794900957255) internal successors, (51991), 21102 states have internal predecessors, (51991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21103 states to 21103 states and 51991 transitions. [2021-06-05 23:16:32,793 INFO L78 Accepts]: Start accepts. Automaton has 21103 states and 51991 transitions. Word has length 65 [2021-06-05 23:16:32,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:32,793 INFO L482 AbstractCegarLoop]: Abstraction has 21103 states and 51991 transitions. [2021-06-05 23:16:32,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 32 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 21103 states and 51991 transitions. [2021-06-05 23:16:32,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:32,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:32,809 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:33,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:33,009 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash -625141291, now seen corresponding path program 112 times [2021-06-05 23:16:33,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:33,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584621863] [2021-06-05 23:16:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:33,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:33,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584621863] [2021-06-05 23:16:33,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584621863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:33,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365779874] [2021-06-05 23:16:33,322 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:33,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:16:33,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:33,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:33,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:33,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:33,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:33,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:33,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:33,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:33,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:33,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:33,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:33,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:33,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:34,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365779874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:34,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:34,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 28 [2021-06-05 23:16:34,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055304770] [2021-06-05 23:16:34,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:16:34,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:34,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:16:34,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:16:34,002 INFO L87 Difference]: Start difference. First operand 21103 states and 51991 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:35,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:35,790 INFO L93 Difference]: Finished difference Result 30947 states and 76274 transitions. [2021-06-05 23:16:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:16:35,791 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:35,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:35,822 INFO L225 Difference]: With dead ends: 30947 [2021-06-05 23:16:35,822 INFO L226 Difference]: Without dead ends: 30535 [2021-06-05 23:16:35,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1342.5ms TimeCoverageRelationStatistics Valid=257, Invalid=2605, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:16:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30535 states. [2021-06-05 23:16:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30535 to 22239. [2021-06-05 23:16:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22239 states, 22238 states have (on average 2.4656443924813383) internal successors, (54831), 22238 states have internal predecessors, (54831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22239 states to 22239 states and 54831 transitions. [2021-06-05 23:16:36,133 INFO L78 Accepts]: Start accepts. Automaton has 22239 states and 54831 transitions. Word has length 65 [2021-06-05 23:16:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:36,133 INFO L482 AbstractCegarLoop]: Abstraction has 22239 states and 54831 transitions. [2021-06-05 23:16:36,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 22239 states and 54831 transitions. [2021-06-05 23:16:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:36,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:36,150 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:36,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 23:16:36,350 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:36,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:36,350 INFO L82 PathProgramCache]: Analyzing trace with hash 921879509, now seen corresponding path program 113 times [2021-06-05 23:16:36,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:36,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526297530] [2021-06-05 23:16:36,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:36,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:36,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526297530] [2021-06-05 23:16:36,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526297530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:36,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245680536] [2021-06-05 23:16:36,754 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:36,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:16:36,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:36,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:36,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:37,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:37,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:37,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:37,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:37,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:37,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:37,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:37,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:37,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:37,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:37,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245680536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:37,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:37,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2021-06-05 23:16:37,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689979027] [2021-06-05 23:16:37,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:16:37,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:37,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:16:37,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:16:37,492 INFO L87 Difference]: Start difference. First operand 22239 states and 54831 transitions. Second operand has 32 states, 32 states have (on average 3.0) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:38,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:38,882 INFO L93 Difference]: Finished difference Result 34023 states and 84647 transitions. [2021-06-05 23:16:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:16:38,883 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:38,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:38,921 INFO L225 Difference]: With dead ends: 34023 [2021-06-05 23:16:38,922 INFO L226 Difference]: Without dead ends: 33743 [2021-06-05 23:16:38,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1466.7ms TimeCoverageRelationStatistics Valid=332, Invalid=2860, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:16:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33743 states. [2021-06-05 23:16:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33743 to 22303. [2021-06-05 23:16:39,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22303 states, 22302 states have (on average 2.4657429826921353) internal successors, (54991), 22302 states have internal predecessors, (54991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22303 states to 22303 states and 54991 transitions. [2021-06-05 23:16:39,368 INFO L78 Accepts]: Start accepts. Automaton has 22303 states and 54991 transitions. Word has length 65 [2021-06-05 23:16:39,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:39,369 INFO L482 AbstractCegarLoop]: Abstraction has 22303 states and 54991 transitions. [2021-06-05 23:16:39,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:39,369 INFO L276 IsEmpty]: Start isEmpty. Operand 22303 states and 54991 transitions. [2021-06-05 23:16:39,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:39,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:39,385 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:39,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:39,586 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:39,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:39,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1503500843, now seen corresponding path program 114 times [2021-06-05 23:16:39,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:39,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110071401] [2021-06-05 23:16:39,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:39,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:39,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110071401] [2021-06-05 23:16:39,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110071401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:39,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431248994] [2021-06-05 23:16:39,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:39,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:16:39,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:39,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:39,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:40,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:40,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:40,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:40,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:40,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:40,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:40,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:40,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:40,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:40,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431248994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:40,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:40,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2021-06-05 23:16:40,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923241646] [2021-06-05 23:16:40,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:16:40,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:40,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:16:40,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:16:40,682 INFO L87 Difference]: Start difference. First operand 22303 states and 54991 transitions. Second operand has 32 states, 32 states have (on average 3.0) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:41,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:41,883 INFO L93 Difference]: Finished difference Result 29095 states and 71967 transitions. [2021-06-05 23:16:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:16:41,884 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:41,915 INFO L225 Difference]: With dead ends: 29095 [2021-06-05 23:16:41,915 INFO L226 Difference]: Without dead ends: 29055 [2021-06-05 23:16:41,915 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1345.7ms TimeCoverageRelationStatistics Valid=298, Invalid=2564, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:16:41,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29055 states. [2021-06-05 23:16:42,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29055 to 22319. [2021-06-05 23:16:42,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22319 states, 22318 states have (on average 2.465767541894435) internal successors, (55031), 22318 states have internal predecessors, (55031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22319 states to 22319 states and 55031 transitions. [2021-06-05 23:16:42,209 INFO L78 Accepts]: Start accepts. Automaton has 22319 states and 55031 transitions. Word has length 65 [2021-06-05 23:16:42,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:42,209 INFO L482 AbstractCegarLoop]: Abstraction has 22319 states and 55031 transitions. [2021-06-05 23:16:42,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.0) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 22319 states and 55031 transitions. [2021-06-05 23:16:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:42,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:42,226 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:42,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:42,427 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash 363466709, now seen corresponding path program 115 times [2021-06-05 23:16:42,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:42,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071625178] [2021-06-05 23:16:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:42,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:42,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071625178] [2021-06-05 23:16:42,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071625178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:42,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289631850] [2021-06-05 23:16:42,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:42,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:42,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:43,444 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 23:16:43,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:43,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:43,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:43,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:43,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 28 disjoint index pairs (out of 55 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:43,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:43,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:43,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:43,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:43,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289631850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:43,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:43,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2021-06-05 23:16:43,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588163167] [2021-06-05 23:16:43,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:16:43,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:43,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:16:43,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:16:43,642 INFO L87 Difference]: Start difference. First operand 22319 states and 55031 transitions. Second operand has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:45,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:45,429 INFO L93 Difference]: Finished difference Result 32175 states and 79699 transitions. [2021-06-05 23:16:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:16:45,429 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:45,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:45,464 INFO L225 Difference]: With dead ends: 32175 [2021-06-05 23:16:45,464 INFO L226 Difference]: Without dead ends: 32111 [2021-06-05 23:16:45,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1526.1ms TimeCoverageRelationStatistics Valid=318, Invalid=2652, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:16:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32111 states. [2021-06-05 23:16:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32111 to 22511. [2021-06-05 23:16:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22511 states, 22510 states have (on average 2.4660595290981786) internal successors, (55511), 22510 states have internal predecessors, (55511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22511 states to 22511 states and 55511 transitions. [2021-06-05 23:16:45,782 INFO L78 Accepts]: Start accepts. Automaton has 22511 states and 55511 transitions. Word has length 65 [2021-06-05 23:16:45,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:45,782 INFO L482 AbstractCegarLoop]: Abstraction has 22511 states and 55511 transitions. [2021-06-05 23:16:45,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.967741935483871) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:45,782 INFO L276 IsEmpty]: Start isEmpty. Operand 22511 states and 55511 transitions. [2021-06-05 23:16:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:45,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:45,800 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:46,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-05 23:16:46,000 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:46,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1821229611, now seen corresponding path program 116 times [2021-06-05 23:16:46,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:46,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663048321] [2021-06-05 23:16:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:46,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:46,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663048321] [2021-06-05 23:16:46,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663048321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:46,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627512295] [2021-06-05 23:16:46,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:46,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:16:46,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:46,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:46,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:46,830 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-06-05 23:16:47,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:47,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:47,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:47,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:47,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 28 disjoint index pairs (out of 55 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:47,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:47,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:47,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:47,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:47,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627512295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:47,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:47,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2021-06-05 23:16:47,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205408604] [2021-06-05 23:16:47,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:16:47,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:47,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:16:47,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:16:47,118 INFO L87 Difference]: Start difference. First operand 22511 states and 55511 transitions. Second operand has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:48,838 INFO L93 Difference]: Finished difference Result 31275 states and 77190 transitions. [2021-06-05 23:16:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:16:48,838 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:48,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:48,873 INFO L225 Difference]: With dead ends: 31275 [2021-06-05 23:16:48,873 INFO L226 Difference]: Without dead ends: 30823 [2021-06-05 23:16:48,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1723.0ms TimeCoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:16:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30823 states. [2021-06-05 23:16:49,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30823 to 25295. [2021-06-05 23:16:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25295 states, 25294 states have (on average 2.4637068079386415) internal successors, (62317), 25294 states have internal predecessors, (62317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:49,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25295 states to 25295 states and 62317 transitions. [2021-06-05 23:16:49,213 INFO L78 Accepts]: Start accepts. Automaton has 25295 states and 62317 transitions. Word has length 65 [2021-06-05 23:16:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:49,213 INFO L482 AbstractCegarLoop]: Abstraction has 25295 states and 62317 transitions. [2021-06-05 23:16:49,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 25295 states and 62317 transitions. [2021-06-05 23:16:49,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:49,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:49,232 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:49,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 23:16:49,433 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:49,433 INFO L82 PathProgramCache]: Analyzing trace with hash -243267115, now seen corresponding path program 117 times [2021-06-05 23:16:49,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:49,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518630708] [2021-06-05 23:16:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 153 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:16:49,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:49,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518630708] [2021-06-05 23:16:49,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518630708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:49,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420351382] [2021-06-05 23:16:49,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:49,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:16:49,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:49,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:49,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:50,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:50,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:50,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:50,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:50,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:50,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:50,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:50,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 15 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:50,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420351382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:50,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:50,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 25 [2021-06-05 23:16:50,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855663388] [2021-06-05 23:16:50,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:16:50,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:50,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:16:50,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:16:50,380 INFO L87 Difference]: Start difference. First operand 25295 states and 62317 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:52,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:52,654 INFO L93 Difference]: Finished difference Result 32375 states and 79952 transitions. [2021-06-05 23:16:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:16:52,655 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:52,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:52,690 INFO L225 Difference]: With dead ends: 32375 [2021-06-05 23:16:52,690 INFO L226 Difference]: Without dead ends: 31959 [2021-06-05 23:16:52,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1894.0ms TimeCoverageRelationStatistics Valid=338, Invalid=2742, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:16:52,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31959 states. [2021-06-05 23:16:52,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31959 to 25695. [2021-06-05 23:16:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25695 states, 25694 states have (on average 2.4642718144313847) internal successors, (63317), 25694 states have internal predecessors, (63317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25695 states to 25695 states and 63317 transitions. [2021-06-05 23:16:53,056 INFO L78 Accepts]: Start accepts. Automaton has 25695 states and 63317 transitions. Word has length 65 [2021-06-05 23:16:53,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:53,056 INFO L482 AbstractCegarLoop]: Abstraction has 25695 states and 63317 transitions. [2021-06-05 23:16:53,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 25 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:53,056 INFO L276 IsEmpty]: Start isEmpty. Operand 25695 states and 63317 transitions. [2021-06-05 23:16:53,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:53,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:53,074 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:53,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:53,275 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:53,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:53,275 INFO L82 PathProgramCache]: Analyzing trace with hash 555299797, now seen corresponding path program 118 times [2021-06-05 23:16:53,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:53,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091073185] [2021-06-05 23:16:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:16:53,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:53,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091073185] [2021-06-05 23:16:53,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091073185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:53,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564712447] [2021-06-05 23:16:53,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:53,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:16:53,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:53,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:53,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:54,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:54,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:54,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:54,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:54,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:54,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:54,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:54,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 11 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:54,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564712447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:54,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:54,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 26 [2021-06-05 23:16:54,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068581557] [2021-06-05 23:16:54,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:16:54,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:54,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:16:54,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:16:54,150 INFO L87 Difference]: Start difference. First operand 25695 states and 63317 transitions. Second operand has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:56,973 INFO L93 Difference]: Finished difference Result 34791 states and 85810 transitions. [2021-06-05 23:16:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:16:56,974 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:57,007 INFO L225 Difference]: With dead ends: 34791 [2021-06-05 23:16:57,007 INFO L226 Difference]: Without dead ends: 34231 [2021-06-05 23:16:57,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1896.0ms TimeCoverageRelationStatistics Valid=361, Invalid=3179, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:16:57,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34231 states. [2021-06-05 23:16:57,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34231 to 25919. [2021-06-05 23:16:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25919 states, 25918 states have (on average 2.4645806003549655) internal successors, (63877), 25918 states have internal predecessors, (63877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:57,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25919 states to 25919 states and 63877 transitions. [2021-06-05 23:16:57,370 INFO L78 Accepts]: Start accepts. Automaton has 25919 states and 63877 transitions. Word has length 65 [2021-06-05 23:16:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:57,370 INFO L482 AbstractCegarLoop]: Abstraction has 25919 states and 63877 transitions. [2021-06-05 23:16:57,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.185185185185185) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:57,370 INFO L276 IsEmpty]: Start isEmpty. Operand 25919 states and 63877 transitions. [2021-06-05 23:16:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:57,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:57,390 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:57,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 23:16:57,590 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:57,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:57,591 INFO L82 PathProgramCache]: Analyzing trace with hash 685620181, now seen corresponding path program 119 times [2021-06-05 23:16:57,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:57,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814436653] [2021-06-05 23:16:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:16:57,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:57,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814436653] [2021-06-05 23:16:57,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814436653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:57,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183596800] [2021-06-05 23:16:57,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:57,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:16:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:57,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:57,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:58,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:58,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:16:58,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:16:58,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:16:58,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:58,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:58,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:58,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:16:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 12 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:58,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183596800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:58,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:58,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 25 [2021-06-05 23:16:58,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729057405] [2021-06-05 23:16:58,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:16:58,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:58,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:16:58,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:16:58,489 INFO L87 Difference]: Start difference. First operand 25919 states and 63877 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:59,811 INFO L93 Difference]: Finished difference Result 33819 states and 83530 transitions. [2021-06-05 23:16:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:16:59,812 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:59,848 INFO L225 Difference]: With dead ends: 33819 [2021-06-05 23:16:59,848 INFO L226 Difference]: Without dead ends: 33719 [2021-06-05 23:16:59,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1145.3ms TimeCoverageRelationStatistics Valid=221, Invalid=2035, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:16:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33719 states. [2021-06-05 23:17:00,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33719 to 26959. [2021-06-05 23:17:00,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26959 states, 26958 states have (on average 2.4659470287113288) internal successors, (66477), 26958 states have internal predecessors, (66477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26959 states to 26959 states and 66477 transitions. [2021-06-05 23:17:00,229 INFO L78 Accepts]: Start accepts. Automaton has 26959 states and 66477 transitions. Word has length 65 [2021-06-05 23:17:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:00,230 INFO L482 AbstractCegarLoop]: Abstraction has 26959 states and 66477 transitions. [2021-06-05 23:17:00,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 26959 states and 66477 transitions. [2021-06-05 23:17:00,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:17:00,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:00,249 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:00,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:00,450 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:00,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:00,450 INFO L82 PathProgramCache]: Analyzing trace with hash 869393877, now seen corresponding path program 120 times [2021-06-05 23:17:00,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:00,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947646844] [2021-06-05 23:17:00,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:00,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:00,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947646844] [2021-06-05 23:17:00,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947646844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:00,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904588413] [2021-06-05 23:17:00,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:00,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:17:00,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:00,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 68 conjunts are in the unsatisfiable core [2021-06-05 23:17:00,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:01,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:01,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:01,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:01,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:17:01,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:01,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:01,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:01,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:17:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:01,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904588413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:01,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:01,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 26 [2021-06-05 23:17:01,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223871696] [2021-06-05 23:17:01,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:17:01,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:01,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:17:01,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:17:01,478 INFO L87 Difference]: Start difference. First operand 26959 states and 66477 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:03,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:03,195 INFO L93 Difference]: Finished difference Result 36567 states and 90236 transitions. [2021-06-05 23:17:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:17:03,196 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:17:03,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:03,235 INFO L225 Difference]: With dead ends: 36567 [2021-06-05 23:17:03,235 INFO L226 Difference]: Without dead ends: 36183 [2021-06-05 23:17:03,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1338.1ms TimeCoverageRelationStatistics Valid=230, Invalid=2220, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:17:03,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36183 states. [2021-06-05 23:17:03,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36183 to 28527. [2021-06-05 23:17:03,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28527 states, 28526 states have (on average 2.4672579401247985) internal successors, (70381), 28526 states have internal predecessors, (70381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28527 states to 28527 states and 70381 transitions. [2021-06-05 23:17:03,627 INFO L78 Accepts]: Start accepts. Automaton has 28527 states and 70381 transitions. Word has length 65 [2021-06-05 23:17:03,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:03,627 INFO L482 AbstractCegarLoop]: Abstraction has 28527 states and 70381 transitions. [2021-06-05 23:17:03,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand 28527 states and 70381 transitions. [2021-06-05 23:17:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:17:03,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:03,648 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:03,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 23:17:03,853 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:03,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1137333803, now seen corresponding path program 121 times [2021-06-05 23:17:03,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:03,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408149903] [2021-06-05 23:17:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:04,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:04,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408149903] [2021-06-05 23:17:04,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408149903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:04,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911379029] [2021-06-05 23:17:04,165 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:04,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:17:04,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:04,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:04,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:04,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:17:04,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:04,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:04,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:04,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:17:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:04,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911379029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:04,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:04,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 27 [2021-06-05 23:17:04,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953484245] [2021-06-05 23:17:04,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:17:04,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:04,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:17:04,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:17:04,797 INFO L87 Difference]: Start difference. First operand 28527 states and 70381 transitions. Second operand has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:06,524 INFO L93 Difference]: Finished difference Result 41391 states and 102480 transitions. [2021-06-05 23:17:06,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:17:06,524 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:17:06,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:06,571 INFO L225 Difference]: With dead ends: 41391 [2021-06-05 23:17:06,571 INFO L226 Difference]: Without dead ends: 41303 [2021-06-05 23:17:06,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1304.9ms TimeCoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:17:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41303 states. [2021-06-05 23:17:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41303 to 28047. [2021-06-05 23:17:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28047 states, 28046 states have (on average 2.4666975682806815) internal successors, (69181), 28046 states have internal predecessors, (69181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28047 states to 28047 states and 69181 transitions. [2021-06-05 23:17:07,006 INFO L78 Accepts]: Start accepts. Automaton has 28047 states and 69181 transitions. Word has length 65 [2021-06-05 23:17:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:07,006 INFO L482 AbstractCegarLoop]: Abstraction has 28047 states and 69181 transitions. [2021-06-05 23:17:07,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand 28047 states and 69181 transitions. [2021-06-05 23:17:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:17:07,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:07,027 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:07,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:07,229 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:07,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:07,229 INFO L82 PathProgramCache]: Analyzing trace with hash -8965675, now seen corresponding path program 122 times [2021-06-05 23:17:07,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:07,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288434948] [2021-06-05 23:17:07,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:07,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:07,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288434948] [2021-06-05 23:17:07,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288434948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:07,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312771944] [2021-06-05 23:17:07,594 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:07,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:17:07,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:07,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:17:07,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:08,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:08,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:08,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:08,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:17:08,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:08,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:08,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:08,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:17:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:08,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312771944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:08,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:08,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2021-06-05 23:17:08,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901972356] [2021-06-05 23:17:08,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:17:08,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:08,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:17:08,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:17:08,250 INFO L87 Difference]: Start difference. First operand 28047 states and 69181 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:09,606 INFO L93 Difference]: Finished difference Result 39047 states and 96941 transitions. [2021-06-05 23:17:09,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:17:09,607 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:17:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:09,650 INFO L225 Difference]: With dead ends: 39047 [2021-06-05 23:17:09,650 INFO L226 Difference]: Without dead ends: 38863 [2021-06-05 23:17:09,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1359.7ms TimeCoverageRelationStatistics Valid=318, Invalid=2544, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:17:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38863 states. [2021-06-05 23:17:10,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38863 to 28127. [2021-06-05 23:17:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28127 states, 28126 states have (on average 2.466792291829624) internal successors, (69381), 28126 states have internal predecessors, (69381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:10,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28127 states to 28127 states and 69381 transitions. [2021-06-05 23:17:10,219 INFO L78 Accepts]: Start accepts. Automaton has 28127 states and 69381 transitions. Word has length 65 [2021-06-05 23:17:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:10,219 INFO L482 AbstractCegarLoop]: Abstraction has 28127 states and 69381 transitions. [2021-06-05 23:17:10,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 28127 states and 69381 transitions. [2021-06-05 23:17:10,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:17:10,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:10,239 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:10,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 23:17:10,440 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:10,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:10,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1382256597, now seen corresponding path program 123 times [2021-06-05 23:17:10,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:10,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648498122] [2021-06-05 23:17:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:10,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:10,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648498122] [2021-06-05 23:17:10,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648498122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:10,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457280779] [2021-06-05 23:17:10,741 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:10,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 23:17:10,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:10,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 23:17:10,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:11,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:11,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:11,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:11,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:11,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:11,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 55 [2021-06-05 23:17:11,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:11,527 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:17:11,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:11,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:159, output treesize:7 [2021-06-05 23:17:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:11,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457280779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:11,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:11,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 25 [2021-06-05 23:17:11,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787196572] [2021-06-05 23:17:11,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:17:11,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:11,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:17:11,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:17:11,539 INFO L87 Difference]: Start difference. First operand 28127 states and 69381 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:14,222 INFO L93 Difference]: Finished difference Result 35719 states and 88144 transitions. [2021-06-05 23:17:14,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:17:14,223 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:17:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:14,264 INFO L225 Difference]: With dead ends: 35719 [2021-06-05 23:17:14,264 INFO L226 Difference]: Without dead ends: 35367 [2021-06-05 23:17:14,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1546.7ms TimeCoverageRelationStatistics Valid=205, Invalid=1957, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:17:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35367 states. [2021-06-05 23:17:14,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35367 to 29039. [2021-06-05 23:17:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29039 states, 29038 states have (on average 2.467284248226462) internal successors, (71645), 29038 states have internal predecessors, (71645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29039 states to 29039 states and 71645 transitions. [2021-06-05 23:17:14,660 INFO L78 Accepts]: Start accepts. Automaton has 29039 states and 71645 transitions. Word has length 65 [2021-06-05 23:17:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:14,661 INFO L482 AbstractCegarLoop]: Abstraction has 29039 states and 71645 transitions. [2021-06-05 23:17:14,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 29039 states and 71645 transitions. [2021-06-05 23:17:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:17:14,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:14,687 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:14,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 23:17:14,887 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:14,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash -624471083, now seen corresponding path program 124 times [2021-06-05 23:17:14,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:14,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675258696] [2021-06-05 23:17:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:15,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:15,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675258696] [2021-06-05 23:17:15,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675258696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:15,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485725352] [2021-06-05 23:17:15,222 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:15,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:17:15,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:15,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:17:15,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:15,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:15,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:15,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:17:15,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:15,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:15,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:15,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:17:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:15,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485725352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:15,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:15,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 26 [2021-06-05 23:17:15,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85025485] [2021-06-05 23:17:15,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:17:15,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:15,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:17:15,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:17:15,821 INFO L87 Difference]: Start difference. First operand 29039 states and 71645 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:17,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:17,160 INFO L93 Difference]: Finished difference Result 40703 states and 100802 transitions. [2021-06-05 23:17:17,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:17:17,161 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:17:17,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:17,205 INFO L225 Difference]: With dead ends: 40703 [2021-06-05 23:17:17,205 INFO L226 Difference]: Without dead ends: 40615 [2021-06-05 23:17:17,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 51 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1236.0ms TimeCoverageRelationStatistics Valid=261, Invalid=2189, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:17:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40615 states. [2021-06-05 23:17:17,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40615 to 28943. [2021-06-05 23:17:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28943 states, 28942 states have (on average 2.4671757307718885) internal successors, (71405), 28942 states have internal predecessors, (71405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28943 states to 28943 states and 71405 transitions. [2021-06-05 23:17:17,629 INFO L78 Accepts]: Start accepts. Automaton has 28943 states and 71405 transitions. Word has length 65 [2021-06-05 23:17:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:17,629 INFO L482 AbstractCegarLoop]: Abstraction has 28943 states and 71405 transitions. [2021-06-05 23:17:17,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 28943 states and 71405 transitions. [2021-06-05 23:17:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:17:17,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:17,656 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:17,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:17,861 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:17,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:17,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1135155157, now seen corresponding path program 125 times [2021-06-05 23:17:17,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:17,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632791109] [2021-06-05 23:17:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:18,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:18,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632791109] [2021-06-05 23:17:18,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632791109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:18,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053287479] [2021-06-05 23:17:18,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:18,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:17:18,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:18,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:17:18,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:24,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:24,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:24,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:24,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:24,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:24,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:24,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:24,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:17:24,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:17:24,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 44 [2021-06-05 23:17:24,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:24,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:24,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:24,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:118, output treesize:3 [2021-06-05 23:17:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:24,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053287479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:24,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:24,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2021-06-05 23:17:24,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827945111] [2021-06-05 23:17:24,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:17:24,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:24,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:17:24,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1211, Unknown=1, NotChecked=0, Total=1332 [2021-06-05 23:17:24,674 INFO L87 Difference]: Start difference. First operand 28943 states and 71405 transitions. Second operand has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:10,013 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-06-05 23:18:21,506 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2021-06-05 23:19:04,497 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2021-06-05 23:19:14,346 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2021-06-05 23:20:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:16,481 INFO L93 Difference]: Finished difference Result 45435 states and 112338 transitions. [2021-06-05 23:20:16,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 23:20:16,481 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:20:16,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:16,529 INFO L225 Difference]: With dead ends: 45435 [2021-06-05 23:20:16,530 INFO L226 Difference]: Without dead ends: 44727 [2021-06-05 23:20:16,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 61285.1ms TimeCoverageRelationStatistics Valid=730, Invalid=8954, Unknown=18, NotChecked=0, Total=9702 [2021-06-05 23:20:16,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44727 states. [2021-06-05 23:20:16,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44727 to 29855. [2021-06-05 23:20:16,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29855 states, 29854 states have (on average 2.4705232129697863) internal successors, (73755), 29854 states have internal predecessors, (73755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29855 states to 29855 states and 73755 transitions. [2021-06-05 23:20:16,994 INFO L78 Accepts]: Start accepts. Automaton has 29855 states and 73755 transitions. Word has length 65 [2021-06-05 23:20:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:16,995 INFO L482 AbstractCegarLoop]: Abstraction has 29855 states and 73755 transitions. [2021-06-05 23:20:16,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 29855 states and 73755 transitions. [2021-06-05 23:20:17,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:20:17,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:17,022 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:17,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:17,222 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:17,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:17,223 INFO L82 PathProgramCache]: Analyzing trace with hash 503897045, now seen corresponding path program 126 times [2021-06-05 23:20:17,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:17,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136452390] [2021-06-05 23:20:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:17,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:17,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136452390] [2021-06-05 23:20:17,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136452390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:17,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131849918] [2021-06-05 23:20:17,639 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:17,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:20:17,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:17,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:20:17,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:18,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:18,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:18,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:20:18,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:18,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:18,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:18,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:20:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:18,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131849918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:18,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:18,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2021-06-05 23:20:18,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207366553] [2021-06-05 23:20:18,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:20:18,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:18,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:20:18,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:20:18,290 INFO L87 Difference]: Start difference. First operand 29855 states and 73755 transitions. Second operand has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:20,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:20,056 INFO L93 Difference]: Finished difference Result 41031 states and 101747 transitions. [2021-06-05 23:20:20,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:20:20,056 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:20:20,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:20,099 INFO L225 Difference]: With dead ends: 41031 [2021-06-05 23:20:20,100 INFO L226 Difference]: Without dead ends: 40943 [2021-06-05 23:20:20,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1440.9ms TimeCoverageRelationStatistics Valid=314, Invalid=2442, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:20:20,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40943 states. [2021-06-05 23:20:20,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40943 to 29855. [2021-06-05 23:20:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29855 states, 29854 states have (on average 2.4705232129697863) internal successors, (73755), 29854 states have internal predecessors, (73755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29855 states to 29855 states and 73755 transitions. [2021-06-05 23:20:20,546 INFO L78 Accepts]: Start accepts. Automaton has 29855 states and 73755 transitions. Word has length 65 [2021-06-05 23:20:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:20,546 INFO L482 AbstractCegarLoop]: Abstraction has 29855 states and 73755 transitions. [2021-06-05 23:20:20,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 29855 states and 73755 transitions. [2021-06-05 23:20:20,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:20:20,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:20,574 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:20,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:20,783 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:20,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:20,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1880620501, now seen corresponding path program 127 times [2021-06-05 23:20:20,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:20,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643216363] [2021-06-05 23:20:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:21,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:21,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643216363] [2021-06-05 23:20:21,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643216363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:21,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654628294] [2021-06-05 23:20:21,158 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:21,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:20:21,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:21,646 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-06-05 23:20:21,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:20:21,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:21,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:21,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:21,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:145, output treesize:7 [2021-06-05 23:20:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:21,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654628294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:21,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:21,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 27 [2021-06-05 23:20:21,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818742493] [2021-06-05 23:20:21,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:20:21,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:21,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:20:21,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:20:21,662 INFO L87 Difference]: Start difference. First operand 29855 states and 73755 transitions. Second operand has 28 states, 28 states have (on average 2.857142857142857) internal successors, (80), 27 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:23,213 INFO L93 Difference]: Finished difference Result 38723 states and 95879 transitions. [2021-06-05 23:20:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:20:23,213 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.857142857142857) internal successors, (80), 27 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:20:23,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:23,255 INFO L225 Difference]: With dead ends: 38723 [2021-06-05 23:20:23,255 INFO L226 Difference]: Without dead ends: 38687 [2021-06-05 23:20:23,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1241.7ms TimeCoverageRelationStatistics Valid=296, Invalid=2254, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:20:23,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38687 states. [2021-06-05 23:20:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38687 to 29887. [2021-06-05 23:20:23,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29887 states, 29886 states have (on average 2.470554774810948) internal successors, (73835), 29886 states have internal predecessors, (73835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29887 states to 29887 states and 73835 transitions. [2021-06-05 23:20:23,751 INFO L78 Accepts]: Start accepts. Automaton has 29887 states and 73835 transitions. Word has length 65 [2021-06-05 23:20:23,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:23,751 INFO L482 AbstractCegarLoop]: Abstraction has 29887 states and 73835 transitions. [2021-06-05 23:20:23,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.857142857142857) internal successors, (80), 27 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 29887 states and 73835 transitions. [2021-06-05 23:20:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 23:20:23,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:23,778 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:23,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:23,979 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:23,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:23,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1171032407, now seen corresponding path program 128 times [2021-06-05 23:20:23,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:23,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710040697] [2021-06-05 23:20:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 81 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:24,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:24,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710040697] [2021-06-05 23:20:24,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710040697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:24,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088271812] [2021-06-05 23:20:24,039 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:24,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:20:24,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:24,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:20:24,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 81 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:20:24,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088271812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:24,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:24,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 23:20:24,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239734996] [2021-06-05 23:20:24,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:20:24,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:24,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:20:24,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:20:24,180 INFO L87 Difference]: Start difference. First operand 29887 states and 73835 transitions. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:24,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:24,293 INFO L93 Difference]: Finished difference Result 32099 states and 79190 transitions. [2021-06-05 23:20:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:20:24,293 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 23:20:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:24,331 INFO L225 Difference]: With dead ends: 32099 [2021-06-05 23:20:24,331 INFO L226 Difference]: Without dead ends: 32091 [2021-06-05 23:20:24,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:20:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32091 states. [2021-06-05 23:20:24,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32091 to 30175. [2021-06-05 23:20:24,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30175 states, 30174 states have (on average 2.4713660767548222) internal successors, (74571), 30174 states have internal predecessors, (74571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30175 states to 30175 states and 74571 transitions. [2021-06-05 23:20:24,769 INFO L78 Accepts]: Start accepts. Automaton has 30175 states and 74571 transitions. Word has length 67 [2021-06-05 23:20:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:24,769 INFO L482 AbstractCegarLoop]: Abstraction has 30175 states and 74571 transitions. [2021-06-05 23:20:24,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:24,769 INFO L276 IsEmpty]: Start isEmpty. Operand 30175 states and 74571 transitions. [2021-06-05 23:20:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-05 23:20:24,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:24,797 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:24,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 23:20:24,998 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:24,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:24,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1917971249, now seen corresponding path program 129 times [2021-06-05 23:20:24,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:24,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401229124] [2021-06-05 23:20:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 9 proven. 187 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:20:25,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:25,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401229124] [2021-06-05 23:20:25,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401229124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:25,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106744797] [2021-06-05 23:20:25,301 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:25,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 23:20:25,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:25,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:20:25,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:25,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:25,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:25,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:25,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:20:25,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:25,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:25,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:25,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:20:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:20:25,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106744797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:25,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:25,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 27 [2021-06-05 23:20:25,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749052979] [2021-06-05 23:20:25,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:20:25,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:25,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:20:25,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:20:25,947 INFO L87 Difference]: Start difference. First operand 30175 states and 74571 transitions. Second operand has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:28,669 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2021-06-05 23:20:28,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:28,919 INFO L93 Difference]: Finished difference Result 48215 states and 119666 transitions. [2021-06-05 23:20:28,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:20:28,919 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-06-05 23:20:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:28,965 INFO L225 Difference]: With dead ends: 48215 [2021-06-05 23:20:28,965 INFO L226 Difference]: Without dead ends: 47591 [2021-06-05 23:20:28,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 2223.2ms TimeCoverageRelationStatistics Valid=407, Invalid=3499, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:20:29,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47591 states. [2021-06-05 23:20:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47591 to 32159. [2021-06-05 23:20:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32159 states, 32158 states have (on average 2.4716400273648857) internal successors, (79483), 32158 states have internal predecessors, (79483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32159 states to 32159 states and 79483 transitions. [2021-06-05 23:20:29,416 INFO L78 Accepts]: Start accepts. Automaton has 32159 states and 79483 transitions. Word has length 69 [2021-06-05 23:20:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:29,416 INFO L482 AbstractCegarLoop]: Abstraction has 32159 states and 79483 transitions. [2021-06-05 23:20:29,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 32159 states and 79483 transitions. [2021-06-05 23:20:29,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-05 23:20:29,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:29,445 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:29,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 23:20:29,646 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:29,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:29,646 INFO L82 PathProgramCache]: Analyzing trace with hash -258255055, now seen corresponding path program 130 times [2021-06-05 23:20:29,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:29,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142865059] [2021-06-05 23:20:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 9 proven. 187 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:20:29,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:29,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142865059] [2021-06-05 23:20:29,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142865059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:29,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515829527] [2021-06-05 23:20:29,974 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:30,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:20:30,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:30,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:20:30,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:30,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:30,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:30,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:30,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 23:20:30,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:30,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:30,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:30,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:20:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 9 proven. 187 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:20:30,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515829527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:30,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:30,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 28 [2021-06-05 23:20:30,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146466171] [2021-06-05 23:20:30,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:20:30,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:30,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:20:30,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:20:30,633 INFO L87 Difference]: Start difference. First operand 32159 states and 79483 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:34,745 INFO L93 Difference]: Finished difference Result 47403 states and 117875 transitions. [2021-06-05 23:20:34,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:20:34,745 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-06-05 23:20:34,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:34,791 INFO L225 Difference]: With dead ends: 47403 [2021-06-05 23:20:34,791 INFO L226 Difference]: Without dead ends: 47199 [2021-06-05 23:20:34,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 2948.6ms TimeCoverageRelationStatistics Valid=609, Invalid=4793, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:20:34,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47199 states. [2021-06-05 23:20:35,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47199 to 32319. [2021-06-05 23:20:35,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32319 states, 32318 states have (on average 2.471780431957423) internal successors, (79883), 32318 states have internal predecessors, (79883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:35,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32319 states to 32319 states and 79883 transitions. [2021-06-05 23:20:35,261 INFO L78 Accepts]: Start accepts. Automaton has 32319 states and 79883 transitions. Word has length 69 [2021-06-05 23:20:35,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:35,261 INFO L482 AbstractCegarLoop]: Abstraction has 32319 states and 79883 transitions. [2021-06-05 23:20:35,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:35,261 INFO L276 IsEmpty]: Start isEmpty. Operand 32319 states and 79883 transitions. [2021-06-05 23:20:35,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:20:35,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:35,291 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:35,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 23:20:35,491 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:35,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:35,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1900906419, now seen corresponding path program 131 times [2021-06-05 23:20:35,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:35,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136496022] [2021-06-05 23:20:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:20:35,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:35,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136496022] [2021-06-05 23:20:35,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136496022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:35,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034614265] [2021-06-05 23:20:35,845 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:35,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 23:20:35,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:35,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 23:20:35,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:36,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:36,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:36,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:36,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:36,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:36,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:36,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:36,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:36,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:20:36,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:36,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:36,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:36,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:20:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 5 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:36,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034614265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:36,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:36,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-06-05 23:20:36,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56849290] [2021-06-05 23:20:36,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:20:36,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:36,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:20:36,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:20:36,867 INFO L87 Difference]: Start difference. First operand 32319 states and 79883 transitions. Second operand has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 37 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:39,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:39,639 INFO L93 Difference]: Finished difference Result 52087 states and 129267 transitions. [2021-06-05 23:20:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:20:39,639 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 37 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:20:39,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:39,701 INFO L225 Difference]: With dead ends: 52087 [2021-06-05 23:20:39,702 INFO L226 Difference]: Without dead ends: 52047 [2021-06-05 23:20:39,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 1815.1ms TimeCoverageRelationStatistics Valid=400, Invalid=4292, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:20:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52047 states. [2021-06-05 23:20:40,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52047 to 33215. [2021-06-05 23:20:40,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33215 states, 33214 states have (on average 2.47109652556151) internal successors, (82075), 33214 states have internal predecessors, (82075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33215 states to 33215 states and 82075 transitions. [2021-06-05 23:20:40,234 INFO L78 Accepts]: Start accepts. Automaton has 33215 states and 82075 transitions. Word has length 71 [2021-06-05 23:20:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:40,234 INFO L482 AbstractCegarLoop]: Abstraction has 33215 states and 82075 transitions. [2021-06-05 23:20:40,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 37 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 33215 states and 82075 transitions. [2021-06-05 23:20:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:20:40,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:40,264 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:40,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:40,465 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:40,465 INFO L82 PathProgramCache]: Analyzing trace with hash 475670963, now seen corresponding path program 132 times [2021-06-05 23:20:40,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:40,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864609054] [2021-06-05 23:20:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:20:40,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:40,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864609054] [2021-06-05 23:20:40,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864609054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:40,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682488729] [2021-06-05 23:20:40,835 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:40,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 23:20:40,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:40,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 23:20:40,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:41,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:41,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:41,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:41,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:41,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:41,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:41,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:41,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:41,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:41,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:20:41,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:41,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:41,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:41,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:170, output treesize:7 [2021-06-05 23:20:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:41,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682488729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:41,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:41,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 38 [2021-06-05 23:20:41,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818702297] [2021-06-05 23:20:41,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:20:41,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:41,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:20:41,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:20:41,978 INFO L87 Difference]: Start difference. First operand 33215 states and 82075 transitions. Second operand has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:44,860 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-06-05 23:20:48,448 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2021-06-05 23:20:48,800 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2021-06-05 23:20:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:49,671 INFO L93 Difference]: Finished difference Result 58283 states and 144389 transitions. [2021-06-05 23:20:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 23:20:49,671 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:20:49,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:49,740 INFO L225 Difference]: With dead ends: 58283 [2021-06-05 23:20:49,740 INFO L226 Difference]: Without dead ends: 57443 [2021-06-05 23:20:49,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 5424.0ms TimeCoverageRelationStatistics Valid=685, Invalid=9415, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 23:20:49,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57443 states. [2021-06-05 23:20:50,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57443 to 33855. [2021-06-05 23:20:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33855 states, 33854 states have (on average 2.470874933538134) internal successors, (83649), 33854 states have internal predecessors, (83649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33855 states to 33855 states and 83649 transitions. [2021-06-05 23:20:50,277 INFO L78 Accepts]: Start accepts. Automaton has 33855 states and 83649 transitions. Word has length 71 [2021-06-05 23:20:50,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:50,277 INFO L482 AbstractCegarLoop]: Abstraction has 33855 states and 83649 transitions. [2021-06-05 23:20:50,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.2051282051282053) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 33855 states and 83649 transitions. [2021-06-05 23:20:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:20:50,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:50,308 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:50,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 23:20:50,508 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:50,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:50,508 INFO L82 PathProgramCache]: Analyzing trace with hash -584494157, now seen corresponding path program 133 times [2021-06-05 23:20:50,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:50,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422822125] [2021-06-05 23:20:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:20:50,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:50,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422822125] [2021-06-05 23:20:50,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422822125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:50,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397809222] [2021-06-05 23:20:50,870 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:50,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:20:50,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:51,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:51,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:51,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:51,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:51,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:51,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:51,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:51,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:51,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:51,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:20:51,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:51,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:51,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:51,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:20:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 14 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:51,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397809222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:51,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:51,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-06-05 23:20:51,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830788512] [2021-06-05 23:20:51,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:20:51,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:51,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:20:51,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:20:51,996 INFO L87 Difference]: Start difference. First operand 33855 states and 83649 transitions. Second operand has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:54,431 INFO L93 Difference]: Finished difference Result 53495 states and 133049 transitions. [2021-06-05 23:20:54,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:20:54,432 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:20:54,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:54,498 INFO L225 Difference]: With dead ends: 53495 [2021-06-05 23:20:54,498 INFO L226 Difference]: Without dead ends: 53311 [2021-06-05 23:20:54,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 1944.2ms TimeCoverageRelationStatistics Valid=406, Invalid=4286, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:20:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53311 states. [2021-06-05 23:20:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53311 to 34159. [2021-06-05 23:20:54,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34159 states, 34158 states have (on average 2.4711341413431698) internal successors, (84409), 34158 states have internal predecessors, (84409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:55,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34159 states to 34159 states and 84409 transitions. [2021-06-05 23:20:55,038 INFO L78 Accepts]: Start accepts. Automaton has 34159 states and 84409 transitions. Word has length 71 [2021-06-05 23:20:55,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:55,038 INFO L482 AbstractCegarLoop]: Abstraction has 34159 states and 84409 transitions. [2021-06-05 23:20:55,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 34159 states and 84409 transitions. [2021-06-05 23:20:55,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:20:55,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:55,068 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:20:55,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:55,269 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:20:55,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:20:55,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1050795597, now seen corresponding path program 134 times [2021-06-05 23:20:55,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:20:55,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78083551] [2021-06-05 23:20:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:20:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:20:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:20:55,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:20:55,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78083551] [2021-06-05 23:20:55,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78083551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:55,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134570291] [2021-06-05 23:20:55,601 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:20:55,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:20:55,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:20:55,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:20:55,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:20:56,412 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-05 23:20:56,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:56,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:56,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:56,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:56,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:56,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:56,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:56,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:20:56,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:20:56,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:20:56,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:20:56,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:20:56,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:20:56,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:20:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 5 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:20:56,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134570291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:20:56,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:20:56,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 36 [2021-06-05 23:20:56,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629132767] [2021-06-05 23:20:56,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:20:56,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:20:56,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:20:56,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:20:56,713 INFO L87 Difference]: Start difference. First operand 34159 states and 84409 transitions. Second operand has 37 states, 37 states have (on average 3.324324324324324) internal successors, (123), 36 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:20:59,290 INFO L93 Difference]: Finished difference Result 54951 states and 136441 transitions. [2021-06-05 23:20:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:20:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.324324324324324) internal successors, (123), 36 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:20:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:20:59,358 INFO L225 Difference]: With dead ends: 54951 [2021-06-05 23:20:59,359 INFO L226 Difference]: Without dead ends: 54863 [2021-06-05 23:20:59,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1767.0ms TimeCoverageRelationStatistics Valid=379, Invalid=4043, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:20:59,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54863 states. [2021-06-05 23:20:59,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54863 to 33919. [2021-06-05 23:20:59,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33919 states, 33918 states have (on average 2.4709298897340646) internal successors, (83809), 33918 states have internal predecessors, (83809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33919 states to 33919 states and 83809 transitions. [2021-06-05 23:20:59,891 INFO L78 Accepts]: Start accepts. Automaton has 33919 states and 83809 transitions. Word has length 71 [2021-06-05 23:20:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:20:59,891 INFO L482 AbstractCegarLoop]: Abstraction has 33919 states and 83809 transitions. [2021-06-05 23:20:59,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.324324324324324) internal successors, (123), 36 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:20:59,891 INFO L276 IsEmpty]: Start isEmpty. Operand 33919 states and 83809 transitions. [2021-06-05 23:20:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:20:59,921 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:20:59,921 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:21:00,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:00,121 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:21:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:21:00,122 INFO L82 PathProgramCache]: Analyzing trace with hash -403180109, now seen corresponding path program 135 times [2021-06-05 23:21:00,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:21:00,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667461303] [2021-06-05 23:21:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:21:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:21:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:21:00,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:21:00,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667461303] [2021-06-05 23:21:00,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667461303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:00,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418334929] [2021-06-05 23:21:00,478 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:21:00,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 23:21:00,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:21:00,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:21:00,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:01,306 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-06-05 23:21:14,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:14,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:14,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:14,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:14,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:14,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:14,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:14,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:14,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:14,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 60 [2021-06-05 23:21:14,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:21:14,660 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 23:21:14,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:21:14,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:177, output treesize:7 [2021-06-05 23:21:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 5 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:14,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418334929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:14,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:14,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-06-05 23:21:14,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676760302] [2021-06-05 23:21:14,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:21:14,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:14,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:21:14,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1262, Unknown=5, NotChecked=0, Total=1406 [2021-06-05 23:21:14,673 INFO L87 Difference]: Start difference. First operand 33919 states and 83809 transitions. Second operand has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 37 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:31,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:31,049 INFO L93 Difference]: Finished difference Result 52511 states and 130429 transitions. [2021-06-05 23:22:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:22:31,050 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 37 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:22:31,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:31,111 INFO L225 Difference]: With dead ends: 52511 [2021-06-05 23:22:31,111 INFO L226 Difference]: Without dead ends: 52079 [2021-06-05 23:22:31,112 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 22900.9ms TimeCoverageRelationStatistics Valid=398, Invalid=4287, Unknown=7, NotChecked=0, Total=4692 [2021-06-05 23:22:31,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52079 states. [2021-06-05 23:22:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52079 to 34335. [2021-06-05 23:22:31,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34335 states, 34334 states have (on average 2.4708161006582396) internal successors, (84833), 34334 states have internal predecessors, (84833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34335 states to 34335 states and 84833 transitions. [2021-06-05 23:22:31,617 INFO L78 Accepts]: Start accepts. Automaton has 34335 states and 84833 transitions. Word has length 71 [2021-06-05 23:22:31,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:31,617 INFO L482 AbstractCegarLoop]: Abstraction has 34335 states and 84833 transitions. [2021-06-05 23:22:31,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.236842105263158) internal successors, (123), 37 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:31,617 INFO L276 IsEmpty]: Start isEmpty. Operand 34335 states and 84833 transitions. [2021-06-05 23:22:31,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:22:31,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:31,647 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:31,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:31,848 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:31,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:31,848 INFO L82 PathProgramCache]: Analyzing trace with hash 395386803, now seen corresponding path program 136 times [2021-06-05 23:22:31,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:31,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026058661] [2021-06-05 23:22:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:22:32,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:32,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026058661] [2021-06-05 23:22:32,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026058661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:32,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050768731] [2021-06-05 23:22:32,357 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:32,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:22:32,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:32,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:22:32,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:33,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:33,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:33,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:33,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:33,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:33,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:33,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:33,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:33,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:33,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:22:33,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:22:33,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:22:33,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:22:33,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:22:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 14 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:33,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050768731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:33,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:33,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-06-05 23:22:33,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139416190] [2021-06-05 23:22:33,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:22:33,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:33,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:22:33,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:22:33,361 INFO L87 Difference]: Start difference. First operand 34335 states and 84833 transitions. Second operand has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:35,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:35,824 INFO L93 Difference]: Finished difference Result 50775 states and 125929 transitions. [2021-06-05 23:22:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:22:35,825 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:22:35,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:35,887 INFO L225 Difference]: With dead ends: 50775 [2021-06-05 23:22:35,887 INFO L226 Difference]: Without dead ends: 50735 [2021-06-05 23:22:35,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 1971.0ms TimeCoverageRelationStatistics Valid=406, Invalid=4286, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:22:35,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50735 states. [2021-06-05 23:22:36,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50735 to 34367. [2021-06-05 23:22:36,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34367 states, 34366 states have (on average 2.4708432753302683) internal successors, (84913), 34366 states have internal predecessors, (84913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34367 states to 34367 states and 84913 transitions. [2021-06-05 23:22:36,492 INFO L78 Accepts]: Start accepts. Automaton has 34367 states and 84913 transitions. Word has length 71 [2021-06-05 23:22:36,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:36,492 INFO L482 AbstractCegarLoop]: Abstraction has 34367 states and 84913 transitions. [2021-06-05 23:22:36,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:36,493 INFO L276 IsEmpty]: Start isEmpty. Operand 34367 states and 84913 transitions. [2021-06-05 23:22:36,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:22:36,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:36,522 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:36,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:36,723 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:36,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:36,723 INFO L82 PathProgramCache]: Analyzing trace with hash -613231693, now seen corresponding path program 137 times [2021-06-05 23:22:36,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:36,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694297330] [2021-06-05 23:22:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:37,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:37,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694297330] [2021-06-05 23:22:37,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694297330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:37,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281755612] [2021-06-05 23:22:37,108 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:37,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:22:37,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:37,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:22:37,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:38,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:38,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:38,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:38,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:38,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:38,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:38,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:38,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:38,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:38,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:22:38,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:22:38,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:22:38,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:22:38,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:22:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:38,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281755612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:38,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:38,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-06-05 23:22:38,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011014190] [2021-06-05 23:22:38,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:22:38,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:38,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:22:38,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:22:38,158 INFO L87 Difference]: Start difference. First operand 34367 states and 84913 transitions. Second operand has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:41,285 INFO L93 Difference]: Finished difference Result 64583 states and 160781 transitions. [2021-06-05 23:22:41,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:22:41,286 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:22:41,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:41,364 INFO L225 Difference]: With dead ends: 64583 [2021-06-05 23:22:41,364 INFO L226 Difference]: Without dead ends: 64351 [2021-06-05 23:22:41,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 1894.2ms TimeCoverageRelationStatistics Valid=400, Invalid=4292, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:22:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64351 states. [2021-06-05 23:22:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64351 to 32383. [2021-06-05 23:22:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32383 states, 32382 states have (on average 2.472762645914397) internal successors, (80073), 32382 states have internal predecessors, (80073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32383 states to 32383 states and 80073 transitions. [2021-06-05 23:22:42,022 INFO L78 Accepts]: Start accepts. Automaton has 32383 states and 80073 transitions. Word has length 71 [2021-06-05 23:22:42,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:42,022 INFO L482 AbstractCegarLoop]: Abstraction has 32383 states and 80073 transitions. [2021-06-05 23:22:42,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:42,022 INFO L276 IsEmpty]: Start isEmpty. Operand 32383 states and 80073 transitions. [2021-06-05 23:22:42,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:22:42,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:42,050 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:42,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:42,251 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:42,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:42,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1243698253, now seen corresponding path program 138 times [2021-06-05 23:22:42,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:42,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084667148] [2021-06-05 23:22:42,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:42,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:42,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084667148] [2021-06-05 23:22:42,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084667148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:42,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537354250] [2021-06-05 23:22:42,588 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:42,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:22:42,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:42,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 23:22:42,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:43,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:43,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:43,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:43,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:43,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:43,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:43,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:43,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:43,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:43,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:22:43,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:22:43,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:22:43,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:22:43,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:170, output treesize:7 [2021-06-05 23:22:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:43,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537354250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:43,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:43,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 35 [2021-06-05 23:22:43,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601837402] [2021-06-05 23:22:43,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:22:43,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:43,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:22:43,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1166, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:22:43,618 INFO L87 Difference]: Start difference. First operand 32383 states and 80073 transitions. Second operand has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:48,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:48,054 INFO L93 Difference]: Finished difference Result 38879 states and 96017 transitions. [2021-06-05 23:22:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:22:48,055 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:22:48,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:48,095 INFO L225 Difference]: With dead ends: 38879 [2021-06-05 23:22:48,096 INFO L226 Difference]: Without dead ends: 38783 [2021-06-05 23:22:48,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 3269.9ms TimeCoverageRelationStatistics Valid=418, Invalid=4694, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:22:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38783 states. [2021-06-05 23:22:48,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38783 to 30479. [2021-06-05 23:22:48,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30479 states, 30478 states have (on average 2.4713891987663232) internal successors, (75323), 30478 states have internal predecessors, (75323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30479 states to 30479 states and 75323 transitions. [2021-06-05 23:22:48,515 INFO L78 Accepts]: Start accepts. Automaton has 30479 states and 75323 transitions. Word has length 71 [2021-06-05 23:22:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:48,515 INFO L482 AbstractCegarLoop]: Abstraction has 30479 states and 75323 transitions. [2021-06-05 23:22:48,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 30479 states and 75323 transitions. [2021-06-05 23:22:48,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:22:48,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:48,542 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:48,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 23:22:48,742 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:48,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1673396813, now seen corresponding path program 139 times [2021-06-05 23:22:48,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:48,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40065590] [2021-06-05 23:22:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:49,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:49,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40065590] [2021-06-05 23:22:49,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40065590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:49,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87938679] [2021-06-05 23:22:49,112 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:49,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:22:49,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:50,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:50,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:50,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:50,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:50,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:50,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:50,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:50,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:50,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:50,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:22:50,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:22:50,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:22:50,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:22:50,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:22:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:50,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87938679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:50,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:50,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-06-05 23:22:50,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368151720] [2021-06-05 23:22:50,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:22:50,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:50,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:22:50,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:22:50,132 INFO L87 Difference]: Start difference. First operand 30479 states and 75323 transitions. Second operand has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:52,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:52,349 INFO L93 Difference]: Finished difference Result 54407 states and 135523 transitions. [2021-06-05 23:22:52,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:22:52,349 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:22:52,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:52,413 INFO L225 Difference]: With dead ends: 54407 [2021-06-05 23:22:52,413 INFO L226 Difference]: Without dead ends: 54175 [2021-06-05 23:22:52,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 1881.6ms TimeCoverageRelationStatistics Valid=406, Invalid=4286, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:22:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54175 states. [2021-06-05 23:22:52,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54175 to 30927. [2021-06-05 23:22:52,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30927 states, 30926 states have (on average 2.4710276143051155) internal successors, (76419), 30926 states have internal predecessors, (76419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30927 states to 30927 states and 76419 transitions. [2021-06-05 23:22:52,905 INFO L78 Accepts]: Start accepts. Automaton has 30927 states and 76419 transitions. Word has length 71 [2021-06-05 23:22:52,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:52,906 INFO L482 AbstractCegarLoop]: Abstraction has 30927 states and 76419 transitions. [2021-06-05 23:22:52,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:52,906 INFO L276 IsEmpty]: Start isEmpty. Operand 30927 states and 76419 transitions. [2021-06-05 23:22:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:22:52,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:52,934 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:53,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 23:22:53,134 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:53,135 INFO L82 PathProgramCache]: Analyzing trace with hash -70060109, now seen corresponding path program 140 times [2021-06-05 23:22:53,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:53,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140875858] [2021-06-05 23:22:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 202 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:22:53,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:53,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140875858] [2021-06-05 23:22:53,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140875858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:53,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022565008] [2021-06-05 23:22:53,497 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:53,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:22:53,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:53,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:22:53,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:54,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:54,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:54,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:54,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:54,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:54,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:54,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:54,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:54,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:54,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:22:54,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:22:54,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:22:54,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:22:54,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:22:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 3 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:54,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022565008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:54,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:54,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 34 [2021-06-05 23:22:54,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022076808] [2021-06-05 23:22:54,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:22:54,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:54,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:22:54,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:22:54,467 INFO L87 Difference]: Start difference. First operand 30927 states and 76419 transitions. Second operand has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:57,718 INFO L93 Difference]: Finished difference Result 45659 states and 113299 transitions. [2021-06-05 23:22:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:22:57,718 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:22:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:57,760 INFO L225 Difference]: With dead ends: 45659 [2021-06-05 23:22:57,760 INFO L226 Difference]: Without dead ends: 45023 [2021-06-05 23:22:57,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 2410.9ms TimeCoverageRelationStatistics Valid=435, Invalid=4677, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:22:57,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45023 states. [2021-06-05 23:22:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45023 to 27967. [2021-06-05 23:22:58,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27967 states, 27966 states have (on average 2.473467782307087) internal successors, (69173), 27966 states have internal predecessors, (69173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27967 states to 27967 states and 69173 transitions. [2021-06-05 23:22:58,168 INFO L78 Accepts]: Start accepts. Automaton has 27967 states and 69173 transitions. Word has length 71 [2021-06-05 23:22:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:58,168 INFO L482 AbstractCegarLoop]: Abstraction has 27967 states and 69173 transitions. [2021-06-05 23:22:58,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand 27967 states and 69173 transitions. [2021-06-05 23:22:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:22:58,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:58,195 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:58,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 23:22:58,397 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2139698253, now seen corresponding path program 141 times [2021-06-05 23:22:58,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:58,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254140641] [2021-06-05 23:22:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:58,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:58,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254140641] [2021-06-05 23:22:58,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254140641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:58,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839244924] [2021-06-05 23:22:58,765 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:58,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:22:58,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:58,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:22:58,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:59,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:59,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:59,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:59,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:59,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:59,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:59,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:59,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:22:59,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:22:59,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:22:59,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:22:59,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:22:59,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:22:59,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:22:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:59,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839244924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:59,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:59,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 36 [2021-06-05 23:22:59,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368701854] [2021-06-05 23:22:59,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:22:59,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:59,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:22:59,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:22:59,786 INFO L87 Difference]: Start difference. First operand 27967 states and 69173 transitions. Second operand has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:01,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:01,591 INFO L93 Difference]: Finished difference Result 52727 states and 131165 transitions. [2021-06-05 23:23:01,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:23:01,592 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:23:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:01,656 INFO L225 Difference]: With dead ends: 52727 [2021-06-05 23:23:01,656 INFO L226 Difference]: Without dead ends: 52639 [2021-06-05 23:23:01,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 1862.3ms TimeCoverageRelationStatistics Valid=379, Invalid=4043, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:23:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52639 states. [2021-06-05 23:23:02,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52639 to 26831. [2021-06-05 23:23:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26831 states, 26830 states have (on average 2.474133432724562) internal successors, (66381), 26830 states have internal predecessors, (66381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26831 states to 26831 states and 66381 transitions. [2021-06-05 23:23:02,190 INFO L78 Accepts]: Start accepts. Automaton has 26831 states and 66381 transitions. Word has length 71 [2021-06-05 23:23:02,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:02,190 INFO L482 AbstractCegarLoop]: Abstraction has 26831 states and 66381 transitions. [2021-06-05 23:23:02,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 26831 states and 66381 transitions. [2021-06-05 23:23:02,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:23:02,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:02,210 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:02,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 23:23:02,411 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:02,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:02,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1492082765, now seen corresponding path program 142 times [2021-06-05 23:23:02,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:02,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155338443] [2021-06-05 23:23:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:02,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:02,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155338443] [2021-06-05 23:23:02,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155338443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:02,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210429139] [2021-06-05 23:23:02,786 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:02,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:23:02,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:02,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:23:02,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:03,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:03,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:03,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:03,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:03,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:03,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:03,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:03,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:23:03,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:23:03,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:23:03,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:23:03,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:23:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:03,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210429139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:03,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:03,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-06-05 23:23:03,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335213530] [2021-06-05 23:23:03,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:23:03,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:03,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:23:03,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:23:03,801 INFO L87 Difference]: Start difference. First operand 26831 states and 66381 transitions. Second operand has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:05,582 INFO L93 Difference]: Finished difference Result 48487 states and 120645 transitions. [2021-06-05 23:23:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:23:05,583 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:23:05,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:05,637 INFO L225 Difference]: With dead ends: 48487 [2021-06-05 23:23:05,637 INFO L226 Difference]: Without dead ends: 48399 [2021-06-05 23:23:05,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 1887.2ms TimeCoverageRelationStatistics Valid=406, Invalid=4286, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:23:05,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48399 states. [2021-06-05 23:23:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48399 to 26959. [2021-06-05 23:23:06,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26959 states, 26958 states have (on average 2.4742562504636845) internal successors, (66701), 26958 states have internal predecessors, (66701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26959 states to 26959 states and 66701 transitions. [2021-06-05 23:23:06,065 INFO L78 Accepts]: Start accepts. Automaton has 26959 states and 66701 transitions. Word has length 71 [2021-06-05 23:23:06,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:06,065 INFO L482 AbstractCegarLoop]: Abstraction has 26959 states and 66701 transitions. [2021-06-05 23:23:06,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:06,065 INFO L276 IsEmpty]: Start isEmpty. Operand 26959 states and 66701 transitions. [2021-06-05 23:23:06,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:23:06,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:06,086 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:06,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:06,287 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:06,287 INFO L82 PathProgramCache]: Analyzing trace with hash -693515853, now seen corresponding path program 143 times [2021-06-05 23:23:06,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:06,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143008236] [2021-06-05 23:23:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:06,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:06,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143008236] [2021-06-05 23:23:06,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143008236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:06,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394465157] [2021-06-05 23:23:06,785 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:06,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:23:06,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:06,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:23:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:07,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:07,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:07,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:07,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:07,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:07,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:07,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:07,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:07,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:07,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:23:07,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:23:07,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:23:07,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:23:07,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:23:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:07,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394465157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:07,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:07,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-06-05 23:23:07,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843328228] [2021-06-05 23:23:07,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:23:07,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:07,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:23:07,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:23:07,818 INFO L87 Difference]: Start difference. First operand 26959 states and 66701 transitions. Second operand has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:09,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:09,676 INFO L93 Difference]: Finished difference Result 47239 states and 117413 transitions. [2021-06-05 23:23:09,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:23:09,677 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:23:09,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:09,731 INFO L225 Difference]: With dead ends: 47239 [2021-06-05 23:23:09,731 INFO L226 Difference]: Without dead ends: 47199 [2021-06-05 23:23:09,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 2011.0ms TimeCoverageRelationStatistics Valid=406, Invalid=4286, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:23:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47199 states. [2021-06-05 23:23:10,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47199 to 27167. [2021-06-05 23:23:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27167 states, 27166 states have (on average 2.4744533608186705) internal successors, (67221), 27166 states have internal predecessors, (67221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27167 states to 27167 states and 67221 transitions. [2021-06-05 23:23:10,159 INFO L78 Accepts]: Start accepts. Automaton has 27167 states and 67221 transitions. Word has length 71 [2021-06-05 23:23:10,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:10,159 INFO L482 AbstractCegarLoop]: Abstraction has 27167 states and 67221 transitions. [2021-06-05 23:23:10,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 27167 states and 67221 transitions. [2021-06-05 23:23:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:23:10,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:10,184 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:10,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 23:23:10,385 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:10,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:10,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1586749517, now seen corresponding path program 144 times [2021-06-05 23:23:10,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:10,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991876824] [2021-06-05 23:23:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:10,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:10,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991876824] [2021-06-05 23:23:10,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991876824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:10,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866032428] [2021-06-05 23:23:10,783 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:10,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 23:23:10,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:10,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-05 23:23:10,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:11,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:11,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:11,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:11,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:11,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:11,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:11,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:11,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:11,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:23:11,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:23:11,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:23:11,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:23:11,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:23:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:11,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866032428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:11,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:11,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 23:23:11,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791064537] [2021-06-05 23:23:11,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:23:11,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:11,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:23:11,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:23:11,949 INFO L87 Difference]: Start difference. First operand 27167 states and 67221 transitions. Second operand has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:14,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:14,082 INFO L93 Difference]: Finished difference Result 46591 states and 115911 transitions. [2021-06-05 23:23:14,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:23:14,082 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:23:14,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:14,133 INFO L225 Difference]: With dead ends: 46591 [2021-06-05 23:23:14,133 INFO L226 Difference]: Without dead ends: 46031 [2021-06-05 23:23:14,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 2060.1ms TimeCoverageRelationStatistics Valid=412, Invalid=4418, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:23:14,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46031 states. [2021-06-05 23:23:14,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46031 to 19935. [2021-06-05 23:23:14,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19935 states, 19934 states have (on average 2.4840473562757097) internal successors, (49517), 19934 states have internal predecessors, (49517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19935 states to 19935 states and 49517 transitions. [2021-06-05 23:23:14,473 INFO L78 Accepts]: Start accepts. Automaton has 19935 states and 49517 transitions. Word has length 71 [2021-06-05 23:23:14,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:14,473 INFO L482 AbstractCegarLoop]: Abstraction has 19935 states and 49517 transitions. [2021-06-05 23:23:14,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:14,473 INFO L276 IsEmpty]: Start isEmpty. Operand 19935 states and 49517 transitions. [2021-06-05 23:23:14,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:23:14,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:14,488 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:14,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:14,689 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1405435469, now seen corresponding path program 145 times [2021-06-05 23:23:14,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:14,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39408122] [2021-06-05 23:23:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:15,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:15,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39408122] [2021-06-05 23:23:15,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39408122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:15,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461592500] [2021-06-05 23:23:15,107 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:15,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:23:15,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:16,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:16,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:16,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:16,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:16,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:16,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:16,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:16,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:16,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:16,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:23:16,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:23:16,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:23:16,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:23:16,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:23:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:16,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461592500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:16,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:16,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 23:23:16,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165668370] [2021-06-05 23:23:16,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:23:16,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:16,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:23:16,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:23:16,153 INFO L87 Difference]: Start difference. First operand 19935 states and 49517 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:19,010 INFO L93 Difference]: Finished difference Result 39543 states and 98661 transitions. [2021-06-05 23:23:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:23:19,010 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:23:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:19,053 INFO L225 Difference]: With dead ends: 39543 [2021-06-05 23:23:19,053 INFO L226 Difference]: Without dead ends: 39455 [2021-06-05 23:23:19,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 2020.9ms TimeCoverageRelationStatistics Valid=412, Invalid=4418, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:23:19,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39455 states. [2021-06-05 23:23:19,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39455 to 19711. [2021-06-05 23:23:19,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19711 states, 19710 states have (on average 2.4838660578386604) internal successors, (48957), 19710 states have internal predecessors, (48957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19711 states to 19711 states and 48957 transitions. [2021-06-05 23:23:19,370 INFO L78 Accepts]: Start accepts. Automaton has 19711 states and 48957 transitions. Word has length 71 [2021-06-05 23:23:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:19,370 INFO L482 AbstractCegarLoop]: Abstraction has 19711 states and 48957 transitions. [2021-06-05 23:23:19,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:19,370 INFO L276 IsEmpty]: Start isEmpty. Operand 19711 states and 48957 transitions. [2021-06-05 23:23:19,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:23:19,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:19,387 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:19,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:19,588 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:19,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:19,588 INFO L82 PathProgramCache]: Analyzing trace with hash -606868557, now seen corresponding path program 146 times [2021-06-05 23:23:19,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:19,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991895194] [2021-06-05 23:23:19,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:19,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:19,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991895194] [2021-06-05 23:23:19,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991895194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:19,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024907816] [2021-06-05 23:23:19,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:20,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:23:20,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:20,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:23:20,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:20,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:21,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:21,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:21,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:21,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:21,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:21,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:21,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:21,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:21,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:23:21,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:23:21,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:23:21,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:23:21,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:23:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:21,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024907816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:21,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:21,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 23:23:21,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775616218] [2021-06-05 23:23:21,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:23:21,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:21,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:23:21,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:23:21,078 INFO L87 Difference]: Start difference. First operand 19711 states and 48957 transitions. Second operand has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:23,555 INFO L93 Difference]: Finished difference Result 39095 states and 97429 transitions. [2021-06-05 23:23:23,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:23:23,556 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:23:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:23,599 INFO L225 Difference]: With dead ends: 39095 [2021-06-05 23:23:23,599 INFO L226 Difference]: Without dead ends: 39055 [2021-06-05 23:23:23,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 1973.3ms TimeCoverageRelationStatistics Valid=412, Invalid=4418, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:23:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39055 states. [2021-06-05 23:23:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39055 to 19647. [2021-06-05 23:23:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19647 states, 19646 states have (on average 2.48381349893108) internal successors, (48797), 19646 states have internal predecessors, (48797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19647 states to 19647 states and 48797 transitions. [2021-06-05 23:23:23,959 INFO L78 Accepts]: Start accepts. Automaton has 19647 states and 48797 transitions. Word has length 71 [2021-06-05 23:23:23,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:23,959 INFO L482 AbstractCegarLoop]: Abstraction has 19647 states and 48797 transitions. [2021-06-05 23:23:23,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 19647 states and 48797 transitions. [2021-06-05 23:23:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:23:23,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:23,974 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:24,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:24,175 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:24,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:24,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1791354445, now seen corresponding path program 147 times [2021-06-05 23:23:24,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:24,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193949227] [2021-06-05 23:23:24,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:24,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:24,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193949227] [2021-06-05 23:23:24,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193949227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:24,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647464191] [2021-06-05 23:23:24,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:24,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 23:23:24,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:24,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 23:23:24,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:25,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:25,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:25,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:25,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:25,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:25,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:25,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 60 [2021-06-05 23:23:25,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:23:25,773 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:23:25,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:23:25,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-06-05 23:23:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:25,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647464191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:25,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:25,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 35 [2021-06-05 23:23:25,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677185292] [2021-06-05 23:23:25,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:23:25,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:25,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:23:25,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:23:25,786 INFO L87 Difference]: Start difference. First operand 19647 states and 48797 transitions. Second operand has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:31,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:31,201 INFO L93 Difference]: Finished difference Result 28039 states and 69373 transitions. [2021-06-05 23:23:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:23:31,201 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:23:31,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:31,228 INFO L225 Difference]: With dead ends: 28039 [2021-06-05 23:23:31,228 INFO L226 Difference]: Without dead ends: 27455 [2021-06-05 23:23:31,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 3446.8ms TimeCoverageRelationStatistics Valid=429, Invalid=4683, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:23:31,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27455 states. [2021-06-05 23:23:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27455 to 20287. [2021-06-05 23:23:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20287 states, 20286 states have (on average 2.4823523612343488) internal successors, (50357), 20286 states have internal predecessors, (50357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:31,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20287 states to 20287 states and 50357 transitions. [2021-06-05 23:23:31,490 INFO L78 Accepts]: Start accepts. Automaton has 20287 states and 50357 transitions. Word has length 71 [2021-06-05 23:23:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:31,490 INFO L482 AbstractCegarLoop]: Abstraction has 20287 states and 50357 transitions. [2021-06-05 23:23:31,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:31,490 INFO L276 IsEmpty]: Start isEmpty. Operand 20287 states and 50357 transitions. [2021-06-05 23:23:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:23:31,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:31,506 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:31,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:31,706 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:31,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:31,707 INFO L82 PathProgramCache]: Analyzing trace with hash 2073914291, now seen corresponding path program 148 times [2021-06-05 23:23:31,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:31,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000020477] [2021-06-05 23:23:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:32,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:32,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000020477] [2021-06-05 23:23:32,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000020477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:32,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106943092] [2021-06-05 23:23:32,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:32,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:23:32,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:32,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:23:32,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:33,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:33,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:33,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:33,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:33,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:33,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:33,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:33,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:33,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:33,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:23:33,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:23:33,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:23:33,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:23:33,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:23:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:33,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106943092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:33,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:33,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 23:23:33,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822970045] [2021-06-05 23:23:33,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:23:33,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:33,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:23:33,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:23:33,158 INFO L87 Difference]: Start difference. First operand 20287 states and 50357 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:35,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:35,099 INFO L93 Difference]: Finished difference Result 32279 states and 80813 transitions. [2021-06-05 23:23:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:23:35,099 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:23:35,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:35,134 INFO L225 Difference]: With dead ends: 32279 [2021-06-05 23:23:35,135 INFO L226 Difference]: Without dead ends: 31999 [2021-06-05 23:23:35,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1935.3ms TimeCoverageRelationStatistics Valid=404, Invalid=4152, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:23:35,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31999 states. [2021-06-05 23:23:35,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31999 to 20719. [2021-06-05 23:23:35,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20719 states, 20718 states have (on average 2.4811757891688386) internal successors, (51405), 20718 states have internal predecessors, (51405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20719 states to 20719 states and 51405 transitions. [2021-06-05 23:23:35,557 INFO L78 Accepts]: Start accepts. Automaton has 20719 states and 51405 transitions. Word has length 71 [2021-06-05 23:23:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:35,557 INFO L482 AbstractCegarLoop]: Abstraction has 20719 states and 51405 transitions. [2021-06-05 23:23:35,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 20719 states and 51405 transitions. [2021-06-05 23:23:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:23:35,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:35,573 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:35,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:35,774 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:35,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:35,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1422486093, now seen corresponding path program 149 times [2021-06-05 23:23:35,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:35,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129967970] [2021-06-05 23:23:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:36,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:36,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129967970] [2021-06-05 23:23:36,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129967970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:36,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553219745] [2021-06-05 23:23:36,189 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:36,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 23:23:36,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 23:23:36,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:37,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:37,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:37,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:37,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:37,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:37,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:37,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:37,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:37,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:37,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:23:37,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:23:37,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:23:37,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:23:37,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:170, output treesize:7 [2021-06-05 23:23:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:37,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553219745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:37,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:37,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2021-06-05 23:23:37,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915746757] [2021-06-05 23:23:37,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:23:37,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:37,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:23:37,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1443, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:23:37,385 INFO L87 Difference]: Start difference. First operand 20719 states and 51405 transitions. Second operand has 40 states, 40 states have (on average 3.15) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:42,571 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 83 [2021-06-05 23:23:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:43,392 INFO L93 Difference]: Finished difference Result 28243 states and 70241 transitions. [2021-06-05 23:23:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:23:43,393 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:23:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:43,419 INFO L225 Difference]: With dead ends: 28243 [2021-06-05 23:23:43,419 INFO L226 Difference]: Without dead ends: 27487 [2021-06-05 23:23:43,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 4379.9ms TimeCoverageRelationStatistics Valid=524, Invalid=6448, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:23:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27487 states. [2021-06-05 23:23:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27487 to 21215. [2021-06-05 23:23:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21215 states, 21214 states have (on average 2.4801074761949655) internal successors, (52613), 21214 states have internal predecessors, (52613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21215 states to 21215 states and 52613 transitions. [2021-06-05 23:23:43,669 INFO L78 Accepts]: Start accepts. Automaton has 21215 states and 52613 transitions. Word has length 71 [2021-06-05 23:23:43,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:43,669 INFO L482 AbstractCegarLoop]: Abstraction has 21215 states and 52613 transitions. [2021-06-05 23:23:43,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 21215 states and 52613 transitions. [2021-06-05 23:23:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:23:43,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:43,686 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:43,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 23:23:43,886 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:43,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:43,886 INFO L82 PathProgramCache]: Analyzing trace with hash -979191885, now seen corresponding path program 150 times [2021-06-05 23:23:43,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:43,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726569928] [2021-06-05 23:23:43,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:44,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:44,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726569928] [2021-06-05 23:23:44,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726569928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:44,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258671763] [2021-06-05 23:23:44,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:44,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 23:23:44,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:44,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-05 23:23:44,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:45,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:45,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:45,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:45,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:45,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:45,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:45,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:45,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:45,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:45,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 60 [2021-06-05 23:23:45,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:23:45,855 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-06-05 23:23:45,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:23:45,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:176, output treesize:7 [2021-06-05 23:23:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:45,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258671763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:45,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:45,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 23:23:45,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086666031] [2021-06-05 23:23:45,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:23:45,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:45,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:23:45,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:23:45,869 INFO L87 Difference]: Start difference. First operand 21215 states and 52613 transitions. Second operand has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:50,957 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 98 [2021-06-05 23:23:56,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:56,726 INFO L93 Difference]: Finished difference Result 35451 states and 87865 transitions. [2021-06-05 23:23:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 23:23:56,726 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:23:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:56,761 INFO L225 Difference]: With dead ends: 35451 [2021-06-05 23:23:56,762 INFO L226 Difference]: Without dead ends: 34327 [2021-06-05 23:23:56,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3934 ImplicationChecksByTransitivity, 8560.4ms TimeCoverageRelationStatistics Valid=1047, Invalid=13715, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 23:23:56,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34327 states. [2021-06-05 23:23:57,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34327 to 22719. [2021-06-05 23:23:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22719 states, 22718 states have (on average 2.485562109340611) internal successors, (56467), 22718 states have internal predecessors, (56467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22719 states to 22719 states and 56467 transitions. [2021-06-05 23:23:57,078 INFO L78 Accepts]: Start accepts. Automaton has 22719 states and 56467 transitions. Word has length 71 [2021-06-05 23:23:57,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:57,078 INFO L482 AbstractCegarLoop]: Abstraction has 22719 states and 56467 transitions. [2021-06-05 23:23:57,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:57,078 INFO L276 IsEmpty]: Start isEmpty. Operand 22719 states and 56467 transitions. [2021-06-05 23:23:57,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:23:57,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:57,095 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:57,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:57,295 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:57,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:57,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1108696499, now seen corresponding path program 151 times [2021-06-05 23:23:57,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:57,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16581922] [2021-06-05 23:23:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:57,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:57,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16581922] [2021-06-05 23:23:57,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16581922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:57,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911162754] [2021-06-05 23:23:57,706 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 [2021-06-05 23:23:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:57,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:23:57,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:57,907 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 23:23:58,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:58,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:58,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:58,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:58,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:58,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:58,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:58,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:23:58,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:58,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:23:58,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:23:58,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:23:58,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:23:58,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:23:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 13 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:58,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911162754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:58,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:58,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 23:23:58,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532262662] [2021-06-05 23:23:58,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:23:58,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:58,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:23:58,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:23:58,820 INFO L87 Difference]: Start difference. First operand 22719 states and 56467 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:01,082 INFO L93 Difference]: Finished difference Result 29367 states and 72977 transitions. [2021-06-05 23:24:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:24:01,083 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:24:01,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:01,114 INFO L225 Difference]: With dead ends: 29367 [2021-06-05 23:24:01,115 INFO L226 Difference]: Without dead ends: 28895 [2021-06-05 23:24:01,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2168.0ms TimeCoverageRelationStatistics Valid=398, Invalid=4024, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:24:01,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28895 states. [2021-06-05 23:24:01,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28895 to 24415. [2021-06-05 23:24:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24415 states, 24414 states have (on average 2.4823052347014007) internal successors, (60603), 24414 states have internal predecessors, (60603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24415 states to 24415 states and 60603 transitions. [2021-06-05 23:24:01,414 INFO L78 Accepts]: Start accepts. Automaton has 24415 states and 60603 transitions. Word has length 71 [2021-06-05 23:24:01,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:01,414 INFO L482 AbstractCegarLoop]: Abstraction has 24415 states and 60603 transitions. [2021-06-05 23:24:01,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:01,415 INFO L276 IsEmpty]: Start isEmpty. Operand 24415 states and 60603 transitions. [2021-06-05 23:24:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:24:01,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:01,433 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:01,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 23:24:01,634 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:01,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:01,634 INFO L82 PathProgramCache]: Analyzing trace with hash -399824461, now seen corresponding path program 152 times [2021-06-05 23:24:01,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:01,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618224862] [2021-06-05 23:24:01,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 198 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:24:01,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:01,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618224862] [2021-06-05 23:24:01,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618224862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:01,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180802522] [2021-06-05 23:24:01,931 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 [2021-06-05 23:24:01,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:24:01,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:01,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:24:01,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:02,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:02,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:02,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:02,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:02,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:02,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:02,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:02,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:02,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:02,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:24:02,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:24:02,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:24:02,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:24:02,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:24:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 7 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:02,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180802522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:02,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:02,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 34 [2021-06-05 23:24:02,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434762810] [2021-06-05 23:24:02,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:24:02,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:02,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:24:02,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:24:02,896 INFO L87 Difference]: Start difference. First operand 24415 states and 60603 transitions. Second operand has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 34 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:05,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:05,345 INFO L93 Difference]: Finished difference Result 32875 states and 81701 transitions. [2021-06-05 23:24:05,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:24:05,345 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 34 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:24:05,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:05,383 INFO L225 Difference]: With dead ends: 32875 [2021-06-05 23:24:05,384 INFO L226 Difference]: Without dead ends: 32319 [2021-06-05 23:24:05,384 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2314.9ms TimeCoverageRelationStatistics Valid=412, Invalid=4010, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:24:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32319 states. [2021-06-05 23:24:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32319 to 23535. [2021-06-05 23:24:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23535 states, 23534 states have (on average 2.483683181779553) internal successors, (58451), 23534 states have internal predecessors, (58451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23535 states to 23535 states and 58451 transitions. [2021-06-05 23:24:05,713 INFO L78 Accepts]: Start accepts. Automaton has 23535 states and 58451 transitions. Word has length 71 [2021-06-05 23:24:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:05,713 INFO L482 AbstractCegarLoop]: Abstraction has 23535 states and 58451 transitions. [2021-06-05 23:24:05,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 34 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 23535 states and 58451 transitions. [2021-06-05 23:24:05,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:24:05,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:05,730 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:05,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 23:24:05,931 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:05,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:05,931 INFO L82 PathProgramCache]: Analyzing trace with hash 477438387, now seen corresponding path program 153 times [2021-06-05 23:24:05,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:05,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891213465] [2021-06-05 23:24:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:06,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:06,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891213465] [2021-06-05 23:24:06,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891213465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:06,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408084186] [2021-06-05 23:24:06,286 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 [2021-06-05 23:24:06,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 23:24:06,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:06,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:24:06,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:07,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:07,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:07,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:07,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:07,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:07,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:07,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:07,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:07,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:07,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:24:07,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:24:07,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:24:07,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:24:07,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:24:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:07,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408084186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:07,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:07,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 35 [2021-06-05 23:24:07,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007398515] [2021-06-05 23:24:07,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:24:07,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:07,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:24:07,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:24:07,288 INFO L87 Difference]: Start difference. First operand 23535 states and 58451 transitions. Second operand has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:09,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:09,645 INFO L93 Difference]: Finished difference Result 28871 states and 71683 transitions. [2021-06-05 23:24:09,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:24:09,646 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:24:09,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:09,675 INFO L225 Difference]: With dead ends: 28871 [2021-06-05 23:24:09,675 INFO L226 Difference]: Without dead ends: 28383 [2021-06-05 23:24:09,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 2093.1ms TimeCoverageRelationStatistics Valid=366, Invalid=3794, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:24:09,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28383 states. [2021-06-05 23:24:09,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28383 to 23087. [2021-06-05 23:24:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23087 states, 23086 states have (on average 2.4831066447197436) internal successors, (57325), 23086 states have internal predecessors, (57325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23087 states to 23087 states and 57325 transitions. [2021-06-05 23:24:09,982 INFO L78 Accepts]: Start accepts. Automaton has 23087 states and 57325 transitions. Word has length 71 [2021-06-05 23:24:09,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:09,982 INFO L482 AbstractCegarLoop]: Abstraction has 23087 states and 57325 transitions. [2021-06-05 23:24:09,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:09,982 INFO L276 IsEmpty]: Start isEmpty. Operand 23087 states and 57325 transitions. [2021-06-05 23:24:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:24:10,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:10,002 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:10,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 23:24:10,202 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:10,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:10,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2035475891, now seen corresponding path program 154 times [2021-06-05 23:24:10,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:10,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305269884] [2021-06-05 23:24:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:10,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:10,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305269884] [2021-06-05 23:24:10,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305269884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:10,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537276427] [2021-06-05 23:24:10,590 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 [2021-06-05 23:24:10,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:24:10,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:10,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:24:10,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:11,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:11,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:11,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:11,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:11,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:11,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:11,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:11,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:11,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:11,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:24:11,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:24:11,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:24:11,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:24:11,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:24:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 13 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:11,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537276427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:11,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:11,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 35 [2021-06-05 23:24:11,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279726789] [2021-06-05 23:24:11,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:24:11,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:11,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:24:11,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:24:11,583 INFO L87 Difference]: Start difference. First operand 23087 states and 57325 transitions. Second operand has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:13,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:13,417 INFO L93 Difference]: Finished difference Result 31975 states and 79499 transitions. [2021-06-05 23:24:13,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:24:13,418 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:24:13,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:13,453 INFO L225 Difference]: With dead ends: 31975 [2021-06-05 23:24:13,453 INFO L226 Difference]: Without dead ends: 31535 [2021-06-05 23:24:13,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 1867.7ms TimeCoverageRelationStatistics Valid=330, Invalid=3452, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:24:13,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31535 states. [2021-06-05 23:24:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31535 to 25455. [2021-06-05 23:24:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25455 states, 25454 states have (on average 2.4821639035122183) internal successors, (63181), 25454 states have internal predecessors, (63181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:13,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25455 states to 25455 states and 63181 transitions. [2021-06-05 23:24:13,780 INFO L78 Accepts]: Start accepts. Automaton has 25455 states and 63181 transitions. Word has length 71 [2021-06-05 23:24:13,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:13,781 INFO L482 AbstractCegarLoop]: Abstraction has 25455 states and 63181 transitions. [2021-06-05 23:24:13,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:13,781 INFO L276 IsEmpty]: Start isEmpty. Operand 25455 states and 63181 transitions. [2021-06-05 23:24:13,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:24:13,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:13,799 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:13,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:14,000 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:14,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:14,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1126450765, now seen corresponding path program 155 times [2021-06-05 23:24:14,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:14,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753161555] [2021-06-05 23:24:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:14,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:14,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753161555] [2021-06-05 23:24:14,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753161555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:14,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104105073] [2021-06-05 23:24:14,358 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:14,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 23:24:14,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:14,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 23:24:14,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:15,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:15,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:15,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:15,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:15,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:15,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:15,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:15,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:15,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:15,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:24:15,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:24:15,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:24:15,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:24:15,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:24:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:15,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104105073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:15,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:15,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 36 [2021-06-05 23:24:15,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930396531] [2021-06-05 23:24:15,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:24:15,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:15,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:24:15,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:24:15,488 INFO L87 Difference]: Start difference. First operand 25455 states and 63181 transitions. Second operand has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:16,906 INFO L93 Difference]: Finished difference Result 40631 states and 101189 transitions. [2021-06-05 23:24:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:24:16,907 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:24:16,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:16,950 INFO L225 Difference]: With dead ends: 40631 [2021-06-05 23:24:16,950 INFO L226 Difference]: Without dead ends: 40543 [2021-06-05 23:24:16,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1884.1ms TimeCoverageRelationStatistics Valid=341, Invalid=3565, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:24:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40543 states. [2021-06-05 23:24:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40543 to 24623. [2021-06-05 23:24:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24623 states, 24622 states have (on average 2.4815612054260416) internal successors, (61101), 24622 states have internal predecessors, (61101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24623 states to 24623 states and 61101 transitions. [2021-06-05 23:24:17,318 INFO L78 Accepts]: Start accepts. Automaton has 24623 states and 61101 transitions. Word has length 71 [2021-06-05 23:24:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:17,318 INFO L482 AbstractCegarLoop]: Abstraction has 24623 states and 61101 transitions. [2021-06-05 23:24:17,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:17,318 INFO L276 IsEmpty]: Start isEmpty. Operand 24623 states and 61101 transitions. [2021-06-05 23:24:17,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:24:17,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:17,335 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:17,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 23:24:17,536 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:17,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1890623053, now seen corresponding path program 156 times [2021-06-05 23:24:17,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:17,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745886658] [2021-06-05 23:24:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:17,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745886658] [2021-06-05 23:24:17,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745886658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052388702] [2021-06-05 23:24:17,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:18,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 23:24:18,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:18,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-05 23:24:18,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:18,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:18,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:18,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:19,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:19,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:19,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:19,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:19,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:19,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:19,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 60 [2021-06-05 23:24:19,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:24:19,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:24:19,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:24:19,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:174, output treesize:7 [2021-06-05 23:24:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:19,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052388702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:19,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:19,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 23:24:19,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865245306] [2021-06-05 23:24:19,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:24:19,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:19,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:24:19,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:24:19,057 INFO L87 Difference]: Start difference. First operand 24623 states and 61101 transitions. Second operand has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:20,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:20,542 INFO L93 Difference]: Finished difference Result 35815 states and 89413 transitions. [2021-06-05 23:24:20,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:24:20,542 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:24:20,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:20,584 INFO L225 Difference]: With dead ends: 35815 [2021-06-05 23:24:20,584 INFO L226 Difference]: Without dead ends: 35631 [2021-06-05 23:24:20,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1818.5ms TimeCoverageRelationStatistics Valid=374, Invalid=3658, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:24:20,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35631 states. [2021-06-05 23:24:20,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35631 to 24735. [2021-06-05 23:24:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24735 states, 24734 states have (on average 2.4816446996037844) internal successors, (61381), 24734 states have internal predecessors, (61381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24735 states to 24735 states and 61381 transitions. [2021-06-05 23:24:20,936 INFO L78 Accepts]: Start accepts. Automaton has 24735 states and 61381 transitions. Word has length 71 [2021-06-05 23:24:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:20,937 INFO L482 AbstractCegarLoop]: Abstraction has 24735 states and 61381 transitions. [2021-06-05 23:24:20,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 24735 states and 61381 transitions. [2021-06-05 23:24:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:24:20,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:20,954 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:21,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:21,155 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:21,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:21,155 INFO L82 PathProgramCache]: Analyzing trace with hash 184616883, now seen corresponding path program 157 times [2021-06-05 23:24:21,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:21,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415595609] [2021-06-05 23:24:21,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:21,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:21,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415595609] [2021-06-05 23:24:21,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415595609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:21,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722403564] [2021-06-05 23:24:21,512 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 [2021-06-05 23:24:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:21,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:24:21,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:22,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:22,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:22,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:22,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:22,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:22,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:22,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:22,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:22,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:22,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:24:22,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:24:22,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:24:22,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:24:22,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:24:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 13 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:22,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722403564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:22,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:22,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 35 [2021-06-05 23:24:22,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097588480] [2021-06-05 23:24:22,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:24:22,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:22,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:24:22,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:24:22,527 INFO L87 Difference]: Start difference. First operand 24735 states and 61381 transitions. Second operand has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:24,353 INFO L93 Difference]: Finished difference Result 31671 states and 78691 transitions. [2021-06-05 23:24:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:24:24,353 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:24:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:24,387 INFO L225 Difference]: With dead ends: 31671 [2021-06-05 23:24:24,387 INFO L226 Difference]: Without dead ends: 31263 [2021-06-05 23:24:24,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1829.7ms TimeCoverageRelationStatistics Valid=311, Invalid=3229, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:24:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31263 states. [2021-06-05 23:24:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31263 to 25903. [2021-06-05 23:24:24,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25903 states, 25902 states have (on average 2.4809281136591768) internal successors, (64261), 25902 states have internal predecessors, (64261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25903 states to 25903 states and 64261 transitions. [2021-06-05 23:24:24,867 INFO L78 Accepts]: Start accepts. Automaton has 25903 states and 64261 transitions. Word has length 71 [2021-06-05 23:24:24,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:24,867 INFO L482 AbstractCegarLoop]: Abstraction has 25903 states and 64261 transitions. [2021-06-05 23:24:24,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 35 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:24,868 INFO L276 IsEmpty]: Start isEmpty. Operand 25903 states and 64261 transitions. [2021-06-05 23:24:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:24:24,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:24,888 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:25,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:25,089 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:25,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:25,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1317657523, now seen corresponding path program 158 times [2021-06-05 23:24:25,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:25,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240007079] [2021-06-05 23:24:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:25,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:25,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240007079] [2021-06-05 23:24:25,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240007079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:25,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474644922] [2021-06-05 23:24:25,462 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 [2021-06-05 23:24:25,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:24:25,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:25,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:24:25,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:26,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:26,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:26,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:26,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:26,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:26,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:26,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:26,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:26,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:26,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:24:26,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:24:26,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:24:26,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:24:26,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:24:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:26,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474644922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:26,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:26,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 36 [2021-06-05 23:24:26,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783890606] [2021-06-05 23:24:26,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:24:26,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:26,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:24:26,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:24:26,490 INFO L87 Difference]: Start difference. First operand 25903 states and 64261 transitions. Second operand has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:28,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:28,256 INFO L93 Difference]: Finished difference Result 40887 states and 101845 transitions. [2021-06-05 23:24:28,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:24:28,257 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:24:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:28,300 INFO L225 Difference]: With dead ends: 40887 [2021-06-05 23:24:28,300 INFO L226 Difference]: Without dead ends: 40799 [2021-06-05 23:24:28,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1750.1ms TimeCoverageRelationStatistics Valid=323, Invalid=3337, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:24:28,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40799 states. [2021-06-05 23:24:28,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40799 to 25631. [2021-06-05 23:24:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25631 states, 25630 states have (on average 2.4807257120561843) internal successors, (63581), 25630 states have internal predecessors, (63581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:28,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25631 states to 25631 states and 63581 transitions. [2021-06-05 23:24:28,685 INFO L78 Accepts]: Start accepts. Automaton has 25631 states and 63581 transitions. Word has length 71 [2021-06-05 23:24:28,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:28,686 INFO L482 AbstractCegarLoop]: Abstraction has 25631 states and 63581 transitions. [2021-06-05 23:24:28,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 36 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:28,686 INFO L276 IsEmpty]: Start isEmpty. Operand 25631 states and 63581 transitions. [2021-06-05 23:24:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:24:28,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:28,704 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:28,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:28,905 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:28,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:28,905 INFO L82 PathProgramCache]: Analyzing trace with hash 965259187, now seen corresponding path program 159 times [2021-06-05 23:24:28,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:28,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931997984] [2021-06-05 23:24:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:29,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:29,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931997984] [2021-06-05 23:24:29,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931997984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:29,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82433741] [2021-06-05 23:24:29,293 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 [2021-06-05 23:24:29,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 23:24:29,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:29,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:24:29,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:30,052 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-05 23:24:30,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:30,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:30,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:30,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:30,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:30,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:30,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:30,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:30,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:30,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:24:30,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:24:30,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:24:30,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:24:30,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:24:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:30,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82433741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:30,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:30,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-06-05 23:24:30,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10339077] [2021-06-05 23:24:30,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:24:30,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:30,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:24:30,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:24:30,441 INFO L87 Difference]: Start difference. First operand 25631 states and 63581 transitions. Second operand has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:32,255 INFO L93 Difference]: Finished difference Result 39015 states and 97173 transitions. [2021-06-05 23:24:32,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:24:32,255 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:24:32,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:32,296 INFO L225 Difference]: With dead ends: 39015 [2021-06-05 23:24:32,296 INFO L226 Difference]: Without dead ends: 38927 [2021-06-05 23:24:32,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1771.3ms TimeCoverageRelationStatistics Valid=362, Invalid=3544, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:24:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38927 states. [2021-06-05 23:24:32,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38927 to 25807. [2021-06-05 23:24:32,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25807 states, 25806 states have (on average 2.4808571650003874) internal successors, (64021), 25806 states have internal predecessors, (64021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25807 states to 25807 states and 64021 transitions. [2021-06-05 23:24:32,661 INFO L78 Accepts]: Start accepts. Automaton has 25807 states and 64021 transitions. Word has length 71 [2021-06-05 23:24:32,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:32,661 INFO L482 AbstractCegarLoop]: Abstraction has 25807 states and 64021 transitions. [2021-06-05 23:24:32,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.263157894736842) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 25807 states and 64021 transitions. [2021-06-05 23:24:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:24:32,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:32,680 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:32,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:32,880 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:32,880 INFO L82 PathProgramCache]: Analyzing trace with hash 553485235, now seen corresponding path program 160 times [2021-06-05 23:24:32,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:32,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564161966] [2021-06-05 23:24:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:33,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:33,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564161966] [2021-06-05 23:24:33,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564161966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:33,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736661966] [2021-06-05 23:24:33,323 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 [2021-06-05 23:24:33,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:24:33,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:33,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:24:33,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:34,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:34,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:34,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:34,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:34,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:34,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:34,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:34,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:34,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:34,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:24:34,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:24:34,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:24:34,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:24:34,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:24:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:34,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736661966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:34,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:34,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 23:24:34,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639783560] [2021-06-05 23:24:34,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:24:34,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:34,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:24:34,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:24:34,358 INFO L87 Difference]: Start difference. First operand 25807 states and 64021 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:36,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:36,318 INFO L93 Difference]: Finished difference Result 37287 states and 92853 transitions. [2021-06-05 23:24:36,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:24:36,318 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:24:36,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:36,358 INFO L225 Difference]: With dead ends: 37287 [2021-06-05 23:24:36,358 INFO L226 Difference]: Without dead ends: 37199 [2021-06-05 23:24:36,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1911.6ms TimeCoverageRelationStatistics Valid=378, Invalid=3654, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:24:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37199 states. [2021-06-05 23:24:36,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37199 to 25807. [2021-06-05 23:24:36,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25807 states, 25806 states have (on average 2.4808571650003874) internal successors, (64021), 25806 states have internal predecessors, (64021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25807 states to 25807 states and 64021 transitions. [2021-06-05 23:24:36,720 INFO L78 Accepts]: Start accepts. Automaton has 25807 states and 64021 transitions. Word has length 71 [2021-06-05 23:24:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:36,720 INFO L482 AbstractCegarLoop]: Abstraction has 25807 states and 64021 transitions. [2021-06-05 23:24:36,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 25807 states and 64021 transitions. [2021-06-05 23:24:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:24:36,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:36,741 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:36,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 23:24:36,941 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash -822858317, now seen corresponding path program 161 times [2021-06-05 23:24:36,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:36,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999868055] [2021-06-05 23:24:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:37,378 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:37,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:37,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999868055] [2021-06-05 23:24:37,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999868055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:37,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370315827] [2021-06-05 23:24:37,378 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 [2021-06-05 23:24:37,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 23:24:37,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:37,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 23:24:37,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:38,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:38,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:38,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:38,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:38,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:38,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:38,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:38,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:38,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:38,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:24:38,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:24:38,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:24:38,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:24:38,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:24:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:38,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370315827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:38,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:38,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 23:24:38,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602262474] [2021-06-05 23:24:38,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:24:38,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:38,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:24:38,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:24:38,449 INFO L87 Difference]: Start difference. First operand 25807 states and 64021 transitions. Second operand has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:39,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:39,808 INFO L93 Difference]: Finished difference Result 34503 states and 85789 transitions. [2021-06-05 23:24:39,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:24:39,809 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:24:39,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:39,845 INFO L225 Difference]: With dead ends: 34503 [2021-06-05 23:24:39,845 INFO L226 Difference]: Without dead ends: 34463 [2021-06-05 23:24:39,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1798.0ms TimeCoverageRelationStatistics Valid=368, Invalid=3538, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:24:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34463 states. [2021-06-05 23:24:40,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34463 to 25823. [2021-06-05 23:24:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25823 states, 25822 states have (on average 2.480869026411587) internal successors, (64061), 25822 states have internal predecessors, (64061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25823 states to 25823 states and 64061 transitions. [2021-06-05 23:24:40,332 INFO L78 Accepts]: Start accepts. Automaton has 25823 states and 64061 transitions. Word has length 71 [2021-06-05 23:24:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:40,332 INFO L482 AbstractCegarLoop]: Abstraction has 25823 states and 64061 transitions. [2021-06-05 23:24:40,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 38 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 25823 states and 64061 transitions. [2021-06-05 23:24:40,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:24:40,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:40,351 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:40,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 23:24:40,552 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:40,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:40,552 INFO L82 PathProgramCache]: Analyzing trace with hash -200995405, now seen corresponding path program 162 times [2021-06-05 23:24:40,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:40,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605742804] [2021-06-05 23:24:40,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:40,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:40,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605742804] [2021-06-05 23:24:40,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605742804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:40,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574092271] [2021-06-05 23:24:40,971 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 [2021-06-05 23:24:41,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 23:24:41,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:41,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 23:24:41,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:43,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:43,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:43,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:43,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:43,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:43,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:43,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:43,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:43,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 60 [2021-06-05 23:24:43,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:24:43,829 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:24:43,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:24:43,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:178, output treesize:7 [2021-06-05 23:24:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:43,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574092271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:43,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:43,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 37 [2021-06-05 23:24:43,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094475618] [2021-06-05 23:24:43,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:24:43,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:43,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:24:43,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:24:43,841 INFO L87 Difference]: Start difference. First operand 25823 states and 64061 transitions. Second operand has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:52,596 INFO L93 Difference]: Finished difference Result 47963 states and 119451 transitions. [2021-06-05 23:24:52,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:24:52,597 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:24:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:52,640 INFO L225 Difference]: With dead ends: 47963 [2021-06-05 23:24:52,640 INFO L226 Difference]: Without dead ends: 47327 [2021-06-05 23:24:52,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 5231.5ms TimeCoverageRelationStatistics Valid=454, Invalid=4948, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:24:52,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47327 states. [2021-06-05 23:24:52,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47327 to 25711. [2021-06-05 23:24:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25711 states, 25710 states have (on average 2.4817191754181254) internal successors, (63805), 25710 states have internal predecessors, (63805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:53,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25711 states to 25711 states and 63805 transitions. [2021-06-05 23:24:53,024 INFO L78 Accepts]: Start accepts. Automaton has 25711 states and 63805 transitions. Word has length 71 [2021-06-05 23:24:53,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:53,024 INFO L482 AbstractCegarLoop]: Abstraction has 25711 states and 63805 transitions. [2021-06-05 23:24:53,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 25711 states and 63805 transitions. [2021-06-05 23:24:53,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:24:53,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:53,043 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:53,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:53,245 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash 597571507, now seen corresponding path program 163 times [2021-06-05 23:24:53,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:53,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276556320] [2021-06-05 23:24:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:53,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:53,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276556320] [2021-06-05 23:24:53,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276556320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:53,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866117294] [2021-06-05 23:24:53,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:24:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:53,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:24:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:54,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:54,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:54,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:54,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:54,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:54,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:54,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:54,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:54,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:24:54,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:24:54,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:24:54,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:24:54,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:24:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:54,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866117294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:54,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:54,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 37 [2021-06-05 23:24:54,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274588010] [2021-06-05 23:24:54,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:24:54,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:54,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:24:54,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:24:54,701 INFO L87 Difference]: Start difference. First operand 25711 states and 63805 transitions. Second operand has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 37 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:57,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:24:57,566 INFO L93 Difference]: Finished difference Result 48775 states and 121581 transitions. [2021-06-05 23:24:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:24:57,566 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 37 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:24:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:24:57,619 INFO L225 Difference]: With dead ends: 48775 [2021-06-05 23:24:57,619 INFO L226 Difference]: Without dead ends: 48687 [2021-06-05 23:24:57,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 2088.6ms TimeCoverageRelationStatistics Valid=448, Invalid=4808, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:24:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48687 states. [2021-06-05 23:24:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48687 to 24831. [2021-06-05 23:24:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24831 states, 24830 states have (on average 2.482682239226742) internal successors, (61645), 24830 states have internal predecessors, (61645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24831 states to 24831 states and 61645 transitions. [2021-06-05 23:24:58,169 INFO L78 Accepts]: Start accepts. Automaton has 24831 states and 61645 transitions. Word has length 71 [2021-06-05 23:24:58,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:24:58,169 INFO L482 AbstractCegarLoop]: Abstraction has 24831 states and 61645 transitions. [2021-06-05 23:24:58,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 37 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:24:58,169 INFO L276 IsEmpty]: Start isEmpty. Operand 24831 states and 61645 transitions. [2021-06-05 23:24:58,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:24:58,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:24:58,187 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:24:58,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 23:24:58,388 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:24:58,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:24:58,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1040865715, now seen corresponding path program 164 times [2021-06-05 23:24:58,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:24:58,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892698573] [2021-06-05 23:24:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:24:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:24:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:58,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:24:58,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892698573] [2021-06-05 23:24:58,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892698573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:58,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456142656] [2021-06-05 23:24:58,828 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 [2021-06-05 23:24:58,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:24:58,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:24:58,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:24:58,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:24:59,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:59,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:59,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:59,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:59,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:59,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:59,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:24:59,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:24:59,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:24:59,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:24:59,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:24:59,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:24:59,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:24:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:24:59,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456142656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:24:59,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:24:59,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 37 [2021-06-05 23:24:59,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245454445] [2021-06-05 23:24:59,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:24:59,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:24:59,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:24:59,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:24:59,868 INFO L87 Difference]: Start difference. First operand 24831 states and 61645 transitions. Second operand has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:02,670 INFO L93 Difference]: Finished difference Result 44871 states and 111829 transitions. [2021-06-05 23:25:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:25:02,671 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:25:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:02,840 INFO L225 Difference]: With dead ends: 44871 [2021-06-05 23:25:02,840 INFO L226 Difference]: Without dead ends: 44783 [2021-06-05 23:25:02,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 2122.0ms TimeCoverageRelationStatistics Valid=454, Invalid=4802, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:25:02,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44783 states. [2021-06-05 23:25:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44783 to 24479. [2021-06-05 23:25:03,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24479 states, 24478 states have (on average 2.4830868535011033) internal successors, (60781), 24478 states have internal predecessors, (60781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24479 states to 24479 states and 60781 transitions. [2021-06-05 23:25:03,199 INFO L78 Accepts]: Start accepts. Automaton has 24479 states and 60781 transitions. Word has length 71 [2021-06-05 23:25:03,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:03,199 INFO L482 AbstractCegarLoop]: Abstraction has 24479 states and 60781 transitions. [2021-06-05 23:25:03,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 24479 states and 60781 transitions. [2021-06-05 23:25:03,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:25:03,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:03,219 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:03,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:03,419 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:03,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:03,420 INFO L82 PathProgramCache]: Analyzing trace with hash 129434547, now seen corresponding path program 165 times [2021-06-05 23:25:03,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:03,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301568496] [2021-06-05 23:25:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:03,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:03,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301568496] [2021-06-05 23:25:03,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301568496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:03,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112648709] [2021-06-05 23:25:03,867 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 [2021-06-05 23:25:03,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 23:25:03,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:03,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:25:03,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:04,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:04,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:04,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:04,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:04,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:04,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:04,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:04,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:25:04,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:25:04,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:25:04,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:25:04,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:25:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:04,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112648709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:04,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:04,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 37 [2021-06-05 23:25:04,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180755753] [2021-06-05 23:25:04,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:25:04,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:04,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:25:04,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:25:04,890 INFO L87 Difference]: Start difference. First operand 24479 states and 60781 transitions. Second operand has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:07,538 INFO L93 Difference]: Finished difference Result 45063 states and 112549 transitions. [2021-06-05 23:25:07,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:25:07,539 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:25:07,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:07,594 INFO L225 Difference]: With dead ends: 45063 [2021-06-05 23:25:07,594 INFO L226 Difference]: Without dead ends: 44879 [2021-06-05 23:25:07,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 2114.8ms TimeCoverageRelationStatistics Valid=466, Invalid=4790, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:25:07,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44879 states. [2021-06-05 23:25:08,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44879 to 24367. [2021-06-05 23:25:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24367 states, 24366 states have (on average 2.48300911105639) internal successors, (60501), 24366 states have internal predecessors, (60501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24367 states to 24367 states and 60501 transitions. [2021-06-05 23:25:08,083 INFO L78 Accepts]: Start accepts. Automaton has 24367 states and 60501 transitions. Word has length 71 [2021-06-05 23:25:08,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:08,083 INFO L482 AbstractCegarLoop]: Abstraction has 24367 states and 60501 transitions. [2021-06-05 23:25:08,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:08,083 INFO L276 IsEmpty]: Start isEmpty. Operand 24367 states and 60501 transitions. [2021-06-05 23:25:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:25:08,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:08,102 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:08,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 23:25:08,302 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:08,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1309650509, now seen corresponding path program 166 times [2021-06-05 23:25:08,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:08,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393676255] [2021-06-05 23:25:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:08,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:08,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393676255] [2021-06-05 23:25:08,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393676255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:08,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191383014] [2021-06-05 23:25:08,703 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 [2021-06-05 23:25:08,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:25:08,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:08,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:25:08,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:09,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:09,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:09,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:09,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:09,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:09,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:09,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:09,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:09,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:25:09,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:25:09,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:25:09,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:25:09,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:25:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:09,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191383014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:09,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:09,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 36 [2021-06-05 23:25:09,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488753298] [2021-06-05 23:25:09,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:25:09,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:09,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:25:09,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:25:09,702 INFO L87 Difference]: Start difference. First operand 24367 states and 60501 transitions. Second operand has 37 states, 37 states have (on average 3.135135135135135) internal successors, (116), 36 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:25:12,279 INFO L93 Difference]: Finished difference Result 43895 states and 109421 transitions. [2021-06-05 23:25:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:25:12,280 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.135135135135135) internal successors, (116), 36 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:25:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:25:12,333 INFO L225 Difference]: With dead ends: 43895 [2021-06-05 23:25:12,333 INFO L226 Difference]: Without dead ends: 43807 [2021-06-05 23:25:12,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 2033.5ms TimeCoverageRelationStatistics Valid=442, Invalid=4528, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:25:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43807 states. [2021-06-05 23:25:12,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43807 to 24047. [2021-06-05 23:25:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24047 states, 24046 states have (on average 2.4827829992514348) internal successors, (59701), 24046 states have internal predecessors, (59701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24047 states to 24047 states and 59701 transitions. [2021-06-05 23:25:12,723 INFO L78 Accepts]: Start accepts. Automaton has 24047 states and 59701 transitions. Word has length 71 [2021-06-05 23:25:12,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:25:12,723 INFO L482 AbstractCegarLoop]: Abstraction has 24047 states and 59701 transitions. [2021-06-05 23:25:12,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.135135135135135) internal successors, (116), 36 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:25:12,723 INFO L276 IsEmpty]: Start isEmpty. Operand 24047 states and 59701 transitions. [2021-06-05 23:25:12,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:25:12,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:25:12,741 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:25:12,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:12,945 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:25:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:25:12,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1721424461, now seen corresponding path program 167 times [2021-06-05 23:25:12,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:25:12,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289594005] [2021-06-05 23:25:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:25:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:25:13,351 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 23:25:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 9 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:13,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:25:13,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289594005] [2021-06-05 23:25:13,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289594005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:13,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101541883] [2021-06-05 23:25:13,509 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 [2021-06-05 23:25:13,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 23:25:13,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:25:13,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-05 23:25:13,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:25:14,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:14,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:14,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:14,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:14,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:14,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:14,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:25:14,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:25:14,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 23:25:14,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:25:14,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:25:14,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:25:14,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:25:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:25:14,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101541883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:25:14,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:25:14,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 37 [2021-06-05 23:25:14,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830495951] [2021-06-05 23:25:14,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:25:14,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:25:14,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:25:14,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:25:14,560 INFO L87 Difference]: Start difference. First operand 24047 states and 59701 transitions. Second operand has 38 states, 38 states have (on average 3.1578947368421053) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 23:25:15,568 WARN L222 SmtUtils]: Removed 3 from assertion stack [2021-06-05 23:25:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:25:15,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:25:15,769 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:25:15,770 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:25:15,772 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:25:15,772 INFO L202 PluginConnector]: Adding new model send-receive.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:25:15 BasicIcfg [2021-06-05 23:25:15,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:25:15,773 INFO L168 Benchmark]: Toolchain (without parser) took 808441.63 ms. Allocated memory was 348.1 MB in the beginning and 2.6 GB in the end (delta: 2.3 GB). Free memory was 327.4 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-06-05 23:25:15,773 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 348.1 MB. Free memory was 328.6 MB in the beginning and 328.5 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:25:15,773 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.56 ms. Allocated memory is still 348.1 MB. Free memory was 327.3 MB in the beginning and 325.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:25:15,773 INFO L168 Benchmark]: Boogie Preprocessor took 16.20 ms. Allocated memory is still 348.1 MB. Free memory was 325.9 MB in the beginning and 325.0 MB in the end (delta: 942.9 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 23:25:15,773 INFO L168 Benchmark]: RCFGBuilder took 294.46 ms. Allocated memory is still 348.1 MB. Free memory was 324.9 MB in the beginning and 311.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 23:25:15,773 INFO L168 Benchmark]: TraceAbstraction took 808100.15 ms. Allocated memory was 348.1 MB in the beginning and 2.6 GB in the end (delta: 2.3 GB). Free memory was 311.5 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-06-05 23:25:15,773 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 348.1 MB. Free memory was 328.6 MB in the beginning and 328.5 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.56 ms. Allocated memory is still 348.1 MB. Free memory was 327.3 MB in the beginning and 325.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.20 ms. Allocated memory is still 348.1 MB. Free memory was 325.9 MB in the beginning and 325.0 MB in the end (delta: 942.9 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 294.46 ms. Allocated memory is still 348.1 MB. Free memory was 324.9 MB in the beginning and 311.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 808100.15 ms. Allocated memory was 348.1 MB in the beginning and 2.6 GB in the end (delta: 2.3 GB). Free memory was 311.5 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (24047states) and FLOYD_HOARE automaton (currently 22 states, 38 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 38 for 14ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 808012.4ms, OverallIterations: 174, TraceHistogramMax: 9, EmptinessCheckTime: 1830.2ms, AutomataDifference: 549829.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 51.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14599 SDtfs, 39205 SDslu, 207225 SDs, 0 SdLazy, 225107 SolverSat, 9472 SolverUnsat, 56 SolverUnknown, 0 SolverNotchecked, 322760.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16671 GetRequests, 7888 SyntacticMatches, 538 SemanticMatches, 8244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117106 ImplicationChecksByTransitivity, 324758.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34367occurred in iteration=143, InterpolantAutomatonStates: 4752, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 34668.4ms AutomataMinimizationTime, 173 MinimizatonAttempts, 1198344 StatesRemovedByMinimization, 170 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 778.8ms SsaConstructionTime, 3328.8ms SatisfiabilityAnalysisTime, 179216.0ms InterpolantComputationTime, 20020 NumberOfCodeBlocks, 20020 NumberOfCodeBlocksAsserted, 926 NumberOfCheckSat, 19676 ConstructedInterpolants, 1382 QuantifiedInterpolants, 703052 SizeOfPredicates, 358 NumberOfNonLiveVariables, 21981 ConjunctsInSsa, 9551 ConjunctsInUnsatCore, 344 InterpolantComputations, 5 PerfectInterpolantSequences, 2929/46119 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown